CN114837478A - Novel wet-towed self-installation type offshore transformer substation and seabed big data center integral structure and installation and maintenance method - Google Patents
Novel wet-towed self-installation type offshore transformer substation and seabed big data center integral structure and installation and maintenance method Download PDFInfo
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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
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- 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
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- 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
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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
- E04H5/02—Buildings or groups of buildings for industrial purposes, e.g. for power-plants or factories
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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
- 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
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- 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
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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
- E04H2005/005—Buildings for data processing centers
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to an integral structure of an offshore transformer substation and a seabed big data center adopting a wet dragging self-installation mode and an installation and maintenance method, and the integral structure mainly comprises an upper module of the offshore transformer substation, an integral jacket, a seabed big data center module and a lifting connecting pile leg for connecting the upper module and the seabed big data center module; the invention adopts a wet-dragging self-installation type integral structure scheme, can be applied to a seabed big data center of an offshore substation structure attached to middle and small upper modules (such as 200 MW-500 MW offshore booster stations), has wide application range and high feasibility, effectively improves the additional value of the offshore substation, meets the requirements of electric energy access and data sending of the seabed big data center, and simplifies the offshore construction operation flow of each stage of transportation, installation, service operation and maintenance.
Description
Technical Field
The invention relates to an integral structure of an offshore transformer substation and a seabed big data center adopting a wet-dragging self-installation mode and an installation and maintenance method, which are suitable for the field of ocean engineering.
Background
In recent years, China has become the country with the most newly increased installed capacity in recent years, and more than 20 small-sized offshore substation structures with different types are successfully built in China. With the development of offshore wind power to deep and far sea and high capacity, the offshore transformer station continuously improves the steel structure consumption, the offshore installation and construction cost and the like, and meanwhile, the subsidy of the offshore wind power moves back to the slope, and the product yield of the offshore transformer station is greatly reduced.
The novel structure of the large data center in the new infrastructure is fused in the large offshore transformer substation researched and developed by the applicant at the application date, the novel structure is disclosed in the Chinese invention patent application with the application number of 202110005696.7, a series of problems of sea land for the seabed large data center (IDC), electric energy supply, data transmission and the like are solved, additional benefits are increased for the offshore transformer substation, and the thought is provided for further improving the sea intensive property.
The offshore substation and seabed large data center structure is suitable for a large-scale substation structure adopting floating-support installation, the upper module of the large-scale substation structure usually reaches ten thousand tons (such as an offshore converter station), and the unilateral length of the plane size can reach hundreds of meters. Due to the width requirement of the floating vessel in the floating installation method, the notches in the independent segmented jacket are usually large, and are suitable for arranging the seabed IDCs and simultaneously used as a positioning frame to assist in accurately positioning the jacket. The scheme aims at the characteristics of a large-scale transformer substation. But the structure types of medium and small-sized offshore alternating current booster stations and the like cannot be directly applied. When the seabed IDC and the small and medium-sized offshore substation structure are fused and applied, the following problems still exist and need to be solved: firstly, the upper blocks of the small and medium-sized offshore transformer substations are generally 1500-4500 tons, the plane size is small, and the adoption of a floating support installation method is not economical; secondly, jacket foundations of existing small and medium-sized offshore substations are all integrated frames, no space for accommodating seabed IDC modules is available underwater at the site where the station is located, and the IDCs need to additionally occupy sea areas if the IDCs are directly combined; thirdly, the installation of the upper blocks of the existing small and medium-sized offshore transformer substations adopts a hoisting mode, the hoisting ship resources are pretty and high in offshore construction cost; fourthly, when the water block and the underwater IDC part of the fusion facility are respectively installed, butt joint surfaces of cables, optical fibers, maintenance channels and the like which need to penetrate through up and down have high requirements on deformation control of the structure, and offshore construction is complex and has a long period. In conclusion, it is necessary to improve the prior art, improve the applicability of the prior art, reduce the difficulty of installation and construction of the offshore substation + and improve the engineering economy.
Disclosure of Invention
The invention aims to provide a novel wet-dragging self-installation type offshore substation + seabed big data center integral structure and a process flow scheme thereof, aiming at the problems that the conventional small and medium-sized offshore substations cannot directly accommodate seabed IDCs, the offshore installation construction cost of upper blocks is high, the seabed IDCs are difficult to connect with the upper blocks and the like, and the offshore substation + seabed IDCs are integrally fused and applied, so that the offshore construction operation flows of each stage of transportation, installation, service operation and maintenance can be simplified, the engineering cost is reduced, and the economical efficiency 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:
novel wet support is from marine transformer substation and big data center overall structure in seabed of installation formula, its characterized in that: the offshore large data center module is mainly composed of an upper module of an offshore substation, an integral jacket, a large subsea data center module and a lifting connecting pile leg for connecting the upper module and the large subsea data center module;
the integral jacket consists of jacket segments on the left side and the right side and a connecting frame for connecting the jacket segments on the left side and the right side; the submarine cable protection pipe is positioned in the two split jacket jackets and is arranged towards the outer side, so that interference between the seabed IDC and the submarine cable route is avoided, and the jacket notch between the jacket on the left side and the jacket on the right side is provided with the connecting frame; the jacket notch is a no sea cable notch.
The connecting frame is provided with a positioning structure, and the seabed 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 large seabed data center module is provided with a pressure-resistant cabin array and a fixed frame, the pressure-resistant cabin array is formed by connecting pressure containers, and the pressure containers are provided with equipment rooms, water ballast tanks and man-passing channel interfaces;
a connecting channel is arranged between the upper module of the offshore substation and the seabed big data center module;
the lifting connecting pile leg penetrates through the upper module and the seabed big data center module, the lifting connecting pile leg is connected with the upper module in a lifting mode, the lifting connecting pile leg only provides a foundation force under a temporary working condition, the supporting force of the upper module of the offshore substation in service is still provided by the jacket, and the lifting connecting pile leg can achieve a lifting function required by an installation process of the upper module of the offshore substation; the seabed big data center module is connected with the lifting type connecting pile leg in a lifting mode, and the lifting function of the seabed big data center module under the temporary working condition can be achieved.
The upper module of the offshore substation is a multi-layer steel structure truss which is applied to commercial engineering, high-voltage primary electrical equipment for realizing main power transmission and transformation functions and an attached electrical secondary, heating ventilation, water supply and drainage and other function guarantee systems are contained, and the total weight of the system is about 1500-4500 tons according to the capacity and the arrangement type of a wind power plant.
For the jacket, 2-3 supporting points are arranged on the single jacket for butt joint with the upper module according to the weight of the upper module; the left and right sides monolithic jacket is symmetrical. Keep away from the strong point outside of linking frame and additionally set up three stake sleeves, strengthen overall structure's horizontal rigidity on the one hand, on the other hand increases pile foundation bearing capacity.
The integral jacket is provided with two connecting frames which are positioned on the upper outermost side and the lower outermost side of the split bottom of the jacket, and the plane is in a shape like a Chinese character 'bi' or 'hui', and is about 3-5 m high. The arrangement mode can effectively ensure the plane error of the butt joint supporting point of the upper module and ensure the butt joint precision when the upper module is lifted while improving the hoisting rigidity of the jacket; the channel space with the reserved notch in the center of the connecting frame can be sunk into the seabed big data module, the guiding and positioning device arranged at the connecting frame can directly position the upper module and the seabed IDC integrated structure, extra construction ships are removed, and the butt joint construction precision is high.
The pressure-proof cabin array part can also refer to a novel structure of a large data center in a new capital construction fused with a large-scale offshore substation developed by the applicant at the application date (see the Chinese invention 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) for circulating internal cooling water, so that the heat dissipation effect is improved, and the PUE is further reduced; meanwhile, the pull lugs are arranged on the two sides of the pressure-resistant cabin, so that the stability under the power working conditions of wet towing, bottom sinking and the like is improved.
The positioning structure and the guiding and positioning structure are matched to accurately position when an upper module of the offshore substation and a large submarine data center module are installed, and to accurately position again when the guiding is separated under the temporary working condition and after the temporary working condition is finished. Further, the fixed frame is provided with the vertical insertion type matched positioning structure, and the vertical insertion type matched positioning structure adopts a bracket insertion point device.
The connecting channel adopts an automatic telescopic connecting channel, such as a telescopic structure. A cable allowance which meets the lifting limit of the large submarine data center module is arranged between the upper module of the offshore substation and the large submarine data center module; when the seabed big data center module sinks or the upper module rises, the automatic telescopic connecting channel can automatically stretch and retract and lay and recover cables.
The cable allowance in the limit state from the time when the seabed IDC sinks to the time when the upper module rises to the top of the lifting connecting pile leg is arranged in the cable expansion structure, and the cable can be automatically stretched and retracted and laid and recovered when the seabed IDC sinks or the upper module rises; meanwhile, the inner side of the connecting channel is provided with a multi-stage ladder stand for the maintainers to go up and down.
The lifting type connecting pile leg is composed of a steel truss, a lifting mechanism and a locking mechanism are arranged in the lifting type connecting pile leg, the lifting mechanism can adopt a gear rack structure and is driven by a motor, and the respective up-and-down movement and respective elevation positioning of an upper module and a lower module (an upper module of a marine transformer substation and a seabed big data center module) can be realized. The number of the lifting type connecting pile legs can be four, and the lifting type connecting pile legs are close to four corners of the module.
To achieve the above object, according to a second aspect of the present invention, the following technical solutions are adopted:
the novel installation and maintenance method of the wet-supported self-installation type offshore transformer substation and the seabed big data center integrated structure is characterized in that the integrated structure of the upper block of the offshore transformer substation, the seabed big data center module, the integrated jacket and the self-installation type pile legs are all built on land or in a dock, and the debugging and the installation of the blocks and equipment in the pressure-resistant cabin are all completed before the blocks and the equipment in the pressure-resistant cabin are shipped out of the sea;
the method comprises the following steps:
firstly, the integral jacket is delivered to a designated sea area, and after hoisting, sinking, piling and leveling, the integrated structure of the upper module block and the seabed big data center module of the offshore substation is delivered; the integrated structure is used for emptying ballast water in the pressure-resistant tank in the wet towing process to provide maximum buoyancy, and if the whole weight is larger, the buoy is additionally arranged to realize the floating state of the whole structure; in the state, the lifting type connecting pile leg is lifted to the highest position, the upper block of the offshore substation is lowered to the position near the sea level, the gravity center is lowered, the stability during wet towing is improved, and the integrated structure is wet towed to the position near the jacket by adopting a towing ship;
lowering the lifting connecting pile leg to the seabed, and after the bottom surface of the lifting upper block is slightly higher than the plane of the supporting point of the jacket, the lifting connecting pile leg contracts upwards to avoid collision when the structure enters the notch of the jacket; after the integrated structure is wet towed to the position without the submarine cable notch by the tug, increasing ballast water in the pressure-resistant tank, simultaneously lowering the lifting type connecting pile leg and the large submarine data center module to the seabed, and inserting the positioning structures on two sides of the fixed frame of the large submarine data center module into the positioning structures in the jacket connecting frame to realize accurate positioning of the whole structure;
then slowly lowering the upper module of the offshore substation to the jacket supporting surface to realize the load transfer of the upper module; finally, laying and connecting pipelines, namely accessing the power generation side submarine cable to the upper module of the offshore substation, communicating various pipelines between the upper module of the offshore substation and the pressure-resistant cabin, and sending out the submarine cable and connecting the optical cable with the upper module of the offshore substation and the pressure-resistant cabin;
in the whole installation process, the connecting channel is self-adjusted according to the relative position of the upper part block of the offshore substation and the seabed big data center module;
in daily work of the seabed big data center module, monitoring is carried out through sensors and cameras which are arranged at different parts of the integrated structure, and an underwater robot executes general structure operation and maintenance work; when local hardware inside the seabed big data center module is damaged, the internal transmission mechanical equipment is used for autonomous replacement;
during daily maintenance, operation and maintenance, workers enter the pressure-resistant cabin of the seabed big data center module from the upper module through the connecting channel; if corrosion protection and marine organism treatment are newly added on the outer side of the pressure-resistant cabin or an internal server is replaced, the large seabed data center module is lifted to the water surface through the lifting connecting pile leg to perform operation; when the large submarine data center module needs to be returned to a factory for maintenance, the lifting connecting pile legs are lifted to be separated from the large submarine data center module, then ballast water in the large submarine data center module is properly drained to realize floating of the large submarine data center module, the connecting channel is dismantled, the connecting pile legs are pulled by a tugboat to be horizontally moved out of the jacket notch, and the connecting pile legs are wet-towed to the land for maintenance.
The invention has the beneficial effects that:
the invention adopts a wet-dragging self-installation type integral structure scheme, can be applied to a seabed big data center of an offshore substation structure attached to middle and small upper modules (such as 200 MW-500 MW offshore booster stations), has wide application range and high feasibility, effectively improves the additional value of the offshore substation, meets the requirements of electric energy access and data sending of the seabed big data center, and particularly:
1) the large seabed data center and the upper module of the transformer substation are arranged up and down in the sea area, the large seabed data center is positioned in the jacket notch, the space utilization rate is high, extra sea area is not needed, and the concept of intensive sea utilization and green IDC is met; and the large data center structure is directly contacted with the seawater, the natural temperature is low, and the seawater can be directly used for cooling the internal equipment.
2) Electric energy required by the operation of the large submarine data center is directly provided by the offshore transformer substation, namely, the electric energy consumed by the large submarine data center is renewable clean energy, and the concept of multi-energy complementation, energy conservation and emission reduction is met; the seabed big data center can share auxiliary systems such as water supply and drainage, heating and ventilation, control and monitoring in the transformer substation module, only core IT equipment, necessary pipelines and watertight equipment are placed in a pressure-resistant cabin, and PUE is greatly reduced; each function partition of the pressure-resistant cabin array is independent, mutual interference does not exist, and the safety is high.
3) The adjustable water ballast tanks are arranged in the pressure-resistant tank array of the large submarine data center, so that the marine transformer substation and the large submarine data center can be conveniently hauled integrally, the large submarine data center and the upper module are connected by adopting self-mounting type pile legs and multiple layers of telescopic sleeves, the upper module and the large submarine data center can be self-mounted in a vertical moving mode, lifting ships are not needed, the cross surface of offshore operation is few, the large submarine data center and the upper module can be mounted simultaneously, the construction process is simple and convenient, and the offshore construction period is greatly shortened.
4) The jacket foundation adopts an integral double-side jacket, a large submarine 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 module is guaranteed, the hoisting structure strength can be effectively improved, and the offshore operation time is greatly shortened compared with that of a jacket with two independent segments; when the structure is in service, the bearing capacity of the pile foundation is provided by the jacket foundation, so that the problems of insufficient bearing capacity, low strength and the like of the self-installed pile leg are effectively solved, and the survival capability of the whole structure under the condition of extreme disasters is improved; the large seabed data center module can keep a certain gap with the seabed by adjusting the ballast water and the elevation of the position of the lifting type connecting pile leg, and can effectively prevent the scouring phenomenon.
5) The daily maintenance operation and maintenance of the large seabed data center can enter the pressure-resistant cabin through the maintenance channel in the multi-section telescopic connecting sleeve without contacting with seawater, and the operation is simple and comfortable; when a large amount of servers in the pressure-resistant cabin need to be replaced or external anticorrosion and marine organism treatment needs to be repaired, the pressure-resistant cabin array can be fixed on the water surface under the combined action of drainage and lifting connecting pile legs, the operation is simple, and the influence on the operation of a large seabed data center is small; if the large seabed data center needs to be returned to a factory for maintenance, the pile legs can be separated from the pressure-resistant cabin array and pulled back by the power ship. Generally, the detection scheme of the invention has multiple applicability and easy operation, can effectively prolong the service life, and can better ensure the stable operation of the seabed IDC.
Drawings
Fig. 1 is a schematic elevation view of the overall structure of the present invention.
FIGS. 2-1, 2-2, 2-3, 2-4 and 2-5 are schematic diagrams of a plan view of a jacket and subsea IDC module, a schematic diagram of a corbel pointing device, a cross-sectional view of an embodiment of a pressure vessel, a schematic diagram of a cross-section of a telescoping connecting channel, and a schematic diagram of an embodiment of a connecting channel, respectively, of the present invention.
FIGS. 3-1, 3-2, 4-1, 4-2, 5-1, 5-2, 6-1, and 6-2 are flow charts of the installation process of the present invention, respectively.
Fig. 7-1 and 7-2 are schematic views of the inspection work in the abnormal inspection state of the present invention.
Detailed Description
For further explanation of the contents, features and effects of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings.
As shown in fig. 1, the present invention is composed of the following parts: the offshore transformer substation upper module comprises an offshore transformer substation upper module 1, an integral jacket 2, a seabed big data center module 3, lifting type connecting pile legs 4 and a telescopic connecting channel 5. The integrated jacket 2 comprises a left jacket single piece 21, a right jacket single piece 22, a connecting frame 23, a submarine cable protection pipe 24 and a steel pipe pile 25. For clarity, the schematic diagram is not an overall structure in service. In service, the undersea big data centre module 3 is lowered into the central space of the connecting frame 23. According to the properties of the surface soil of the seabed, if the scouring effect is obvious, adjusting the height positioning of the ballast water tank 3A and the seabed big data center module 3 in the lifting type connecting pile leg 4, and placing the seabed big data center module 3 above the seabed by 0.5-1 m to avoid the stress concentration caused by the unevenness of the seabed after direct sitting and scouring; if the scouring effect is weak, the large subsea data center module 3 can sit directly on the seabed.
As shown in fig. 2-1, in the embodiment, the jacket is provided with 6 support points in total to be butted with the upper block (two columns in the middle), and the outer 6 pile-sleeve structures only for enhancing the rigidity and the bearing capacity of the pile foundation are provided, and 12 steel pipe piles are arranged in total. According to the submarine cable access requirement of the offshore substation, 16 submarine cable protection pipes 24 are reserved, the upper ports and the lower ports are respectively positioned on the inner side and the outer side of the single jacket 21 and 22, and a submarine cable-free notch is formed between the left jacket single piece 21 and the right jacket single piece 22 so as to arrange the submarine large data center module 3; the left jacket single piece 21 and the right jacket single piece 22 are connected through two connecting frames 23 in a welding mode, rigidity during 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 seabed big data center module 3 and the upper module 1 is facilitated.
The large seabed data center module 3 consists of a fixed frame 31, a pressure-resistant cabin array 32 and a bracket tip inserting device 33. As shown in fig. 2-2, the bracket insertion tip device 33 is welded to the outside of the fixed frame 31, the fixed steel plate 311 having rigidity satisfying the butt joint requirement is welded to the position of the fixed frame 31 where the bracket is disposed, the bracket insertion tip device structure composed of the upper plate 331, the reinforcing rib plate 332, the lower plate 333, and the insertion tip 334 is welded to the outside of the fixed steel plate 311, and the fixed frame 31 is provided with the bracket insertion tip device 33 at four positions corresponding to the positions of the guide sleeve 231.
As shown in fig. 2-3, the pressure pod array 32 is made up of a cylindrical array of pressure vessels 321 connected together. The cylindrical pressure container 321 is provided with a ballast water control pipeline 322, a man-passing channel interface 324, a seaworthy pull lug 325 and a fixed base 326, the pressure-resistant cabin array 32 is fixed by welding the fixed support 326 at the bottom and utilizing fillet welds at the periphery of the fixed support 326 and the fixed frame 31, and meanwhile, a guy cable is arranged on the lower half side of the pressure-resistant cabin and is fixed on the seaworthy pull lug 325. A ballast water tank 3A, a cooling circulation pipe 323, a server 327, a robot 328, and a pipe 329 such as a cable are provided in the cylindrical pressure vessel 321. A cooling circulation pipeline 323 is connected into the cylindrical pressure container 321 at the end part to realize the circulation of cooling water, and is in direct contact with seawater to further accelerate heat dissipation and reduce PUE; the passerby channel interface 324 can be connected with passerby channel interfaces of other individual capsule bodies through flanges, and an internal passerby overhaul channel is formed after connection is completed; the arrangement of the airworthiness lug 325 can improve the stability of the cylindrical pressure container 321 under wet dragging, sinking/floating and other power working conditions; the interior of the cylindrical pressure container 321 is divided into three layers, the top layer is provided with a pipeline 329 such as a cable, the middle layer is a main equipment layer and is provided with a server 327, 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 connecting channel 5, and a sufficient cable, optical fiber and other lines 51 meeting the limit lifting allowance of the large data center module 3 are arranged between the upper module 1 of the offshore substation and the large data center module 3, the cables and the optical fiber pass through the telescopic connecting channel 5, the lines are also provided with cable drums 52 capable of winding and unwinding the cables, and the cable drums 52 can be arranged in the telescopic connecting channel 5. At each stage of the whole structure, the retractable connecting channel 5 can be automatically adjusted in a retractable manner according to the distance between the upper module 1 of the offshore substation and the big data center module 3 on the seabed, and the cable reel 52 can be controlled to recover and pay out the cables and optical fibers. Under the normal maintenance state, the maintainer accessible vertical ladder 53 gets into withstand voltage under-deck.
As shown in fig. 2-5, the retractable connecting channel 5 is divided into four parts, namely a non-retractable section 54, a large-diameter retractable section 55, a middle-diameter retractable section 56 and a small-diameter retractable section 57, the inner diameter of the larger section is equal to or slightly larger than the outer diameter of the smaller section, and a gap is filled with watertight material, so that the function of sliding up and down is realized while no gap is ensured in the retractable section; the non-telescopic section is connected with the telescopic section by a connecting flange 58, so that the disconnection processing during the maintenance operation is convenient. When the upper block 1 and the large seabed data center 3 are at the maximum distance position, the sections 55, 56 and 57 of the telescopic section are all positioned at the outer sides of the sections, and when the distance between the sections is changed, the telescopic section can be built in and pulled out through pulling/pressing force, 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 schematic diagram of the marine transportation and installation of the present 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, the bottom of the jacket is sunk by hoisting, the steel pipe pile 25 is driven into the main conduit and the sleeve, and the leveling and pile top cutting processes are performed 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 subsea large data center module 3 is towed by a tug 6 to a designated sea area. In the wet towing process, the bottom surface of the upper block 1 is close to 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 put down to the seabed, and the upper module 1 is lifted to make the bottom surface of the upper module higher than the supporting plane 1-2 m of the integral jacket 2.
4) As shown in fig. 4-2, the lift connector legs 4 are lifted upwards and the tug 6 continues to pull the integrated structure into the sea-cable-free recess in the integrated jacket 2 between the left jacket half-piece 21 and the right jacket half-piece 22, taking care to avoid collision of the lift connector legs 4 with the connecting frame 23.
5) As shown in fig. 5-1 and 5-2, after the preliminary positioning, the ballast water in the ballast water tank 3A is added, the large data center module 3 of the sea bottom and the lifting type connecting spud leg 4 are lowered to the sea bottom, and the four bracket tip insertion devices 33 of the fixed frame 31 are inserted into the guide sleeve 231, so that the precise positioning of the whole structure is realized.
6) As shown in fig. 6-1 and 6-2, slowly lowering the upper module 1 to the supporting surface of the integral jacket 2, and welding crown plates and the like to realize load transfer of the upper module; and finally, checking the pipeline in the telescopic connecting channel 5 to finish offshore installation.
Fig. 7-1 and 7-2 are schematic diagrams of the overhaul operation in two abnormal overhaul states of the invention. As shown in fig. 7-1, if the pressure-resistant tank array 32 in the large subsea data center module 3 needs to clean marine life on the outside, repair anticorrosive paint, and replace a small-range server, the downloaded water in the ballast water tank 3A can be drained, and the module 3 is lifted to the vicinity of the sea level by the lifting connecting legs 4, so as to meet the above operation requirements. As shown in fig. 7-2, if the large-scale server replacement or equipment updating is required for the large-scale server replacement or equipment updating of the large-scale data center module 3, the lifting connection leg 4 can be lifted to be separated from the large-scale data center module 3, the connection flange 58 is removed, the telescopic connection channel 5 is divided into the upper telescopic section and the lower fixed section 54, the cable connected with the large-scale data center module 3 is removed, the ballast water in the ballast water tank 3A is adjusted to float upwards, and the large-scale data center module is pulled to the outer side of the no-submarine cable notch by the tugboat 6, so that the large-scale data center module can be returned to the factory for maintenance.
The above embodiment is merely a preferred embodiment of the present invention, and those skilled in the art will understand that modifications or substitutions of technical solutions or parameters in the embodiment can be made without departing from the principle and essence of the present invention, and all of them shall be covered by the protection scope of the present invention.
Claims (7)
1. Novel wet support is from marine transformer substation and big data center overall structure in seabed of installation formula, its characterized in that: the offshore large data center module is mainly composed of an upper module of an offshore substation, an integral jacket, a large subsea data center module and a lifting connecting pile leg for connecting the upper module and the large subsea data center module;
the integral jacket consists of jacket fragments on the left side and the right side and a connecting frame for connecting the jacket fragments on the left side and the right side; the submarine cable protection pipe is positioned in the jacket with the two sub-pieces and arranged outwards, and the jacket notch between the jacket at the left side and the jacket at the right side is provided with the connecting frame;
the connecting frame is provided with a guiding and positioning structure, and the seabed 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 large seabed data center module is provided with a pressure-resistant cabin array and a fixed frame, the pressure-resistant cabin array is formed by connecting pressure containers, and the pressure containers are provided with equipment rooms, water ballast tanks and man-passing channel interfaces;
a connecting channel is arranged between the upper module of the offshore substation and the seabed big data center module;
the lifting connecting pile leg penetrates through the upper module and the seabed big data center module, the lifting connecting pile leg is connected with the upper module in a lifting mode, the lifting connecting pile leg only provides a foundation force under a temporary working condition, the supporting force of the upper module of the offshore substation in service is still provided by the jacket, and the lifting connecting pile leg can achieve a lifting function required by an installation process of the upper module of the offshore substation; the seabed big data center module is connected with the lifting type connecting pile leg in a lifting mode, and the lifting function of the seabed big data center module under the temporary working condition can be achieved.
2. The new wet-supporting self-installing offshore substation and large subsea data center integrated structure according to claim 1, wherein said fixing frame is provided with said vertical insertion type matching positioning structure, said vertical insertion type matching positioning structure employs a bracket insertion point device, which can be accurately positioned when the upper block of the offshore substation is installed with the large subsea data center module, and can be accurately positioned again when the guiding is disengaged in the temporary working condition and after the temporary working condition is over.
3. The new wet-supported self-installed offshore substation and large subsea data center integrated structure of claim 1, characterized in that said connection channel is an automatic telescopic connection channel; and a cable allowance which meets the lifting limit of the submarine big data center module is arranged between the upper module of the offshore substation and the submarine big data center module.
4. The new wet-supporting self-installing offshore substation and large subsea data center integrated structure of claim 3, wherein said automatic telescopic connecting channel can automatically extend and retract and implement cable laying and recovery when the large subsea data center module sinks or the upper module rises.
5. The new wet-supported self-installed offshore substation and large subsea data center integrated structure as claimed in claim 3, wherein adjacent pressure vessels form a sealed man-through channel by man-through channel interface connection, the lower end of said connection channel being connected with said man-through channel.
6. The new wet-supported self-installed offshore substation and large subsea data center integrated structure of claim 3, characterized in that said jacket notch is a no sea cable notch.
7. The novel installation and maintenance method of the wet-supported self-installation type offshore transformer substation and the seabed big data center integrated structure is characterized in that the integrated structure of the upper block of the offshore transformer substation, the seabed big data center module, the integrated jacket and the self-installation type pile legs are all built on land or in a dock, and the debugging and the installation of the blocks and equipment in the pressure-resistant cabin are all completed before the blocks and the equipment in the pressure-resistant cabin are shipped out of the sea;
the method comprises the following steps:
firstly, the integral jacket is delivered to a designated sea area, and after hoisting, sinking, piling and leveling, the integrated structure of the upper module block and the seabed big data center module of the offshore substation is delivered; the integrated structure is used for emptying ballast water in the pressure-resistant tank in the wet towing process to provide maximum buoyancy, and if the whole weight is larger, the buoy is additionally arranged to realize the floating state of the whole structure; in the state, the lifting type connecting pile leg is lifted to the highest position, the upper block of the offshore substation is lowered to the position near the sea level, the gravity center is lowered, the stability during wet towing is improved, and the integrated structure is wet towed to the position near the jacket by adopting a towing ship;
lowering the lifting connecting pile leg to the seabed, and after the bottom surface of the upper block is lifted to be slightly higher than the plane of the supporting point of the jacket, the lifting connecting pile leg contracts upwards to avoid collision when the structure enters the notch of the jacket; after the integrated structure is wet towed to the position without the submarine cable notch by the tug, increasing ballast water in the pressure-resistant tank, simultaneously lowering the lifting type connecting pile leg and the large submarine data center module to the seabed, and inserting the positioning structures on two sides of the fixed frame of the large submarine data center module into the positioning structures in the jacket connecting frame to realize accurate positioning of the whole structure;
then slowly lowering the upper part module of the offshore substation to the jacket supporting surface to realize the load transfer of the upper part module; finally, laying and connecting pipelines, namely accessing the power generation side submarine cable to the upper module of the offshore substation, communicating various pipelines between the upper module of the offshore substation and the pressure-resistant cabin, and sending out the submarine cable and connecting the optical cable with the upper module of the offshore substation and the pressure-resistant cabin;
in the whole installation process, the connecting channel is self-adjusted according to the relative position of the upper part block of the offshore substation and the seabed big data center module;
in daily work of the seabed big data center module, monitoring is carried out through sensors and cameras which are arranged at different parts of the integrated structure, and an underwater robot executes general structure operation and maintenance work; when local hardware inside the seabed big data center module is damaged, the internal transmission mechanical equipment is used for autonomous replacement;
during daily maintenance, operation and maintenance, workers enter the pressure-resistant cabin of the seabed big data center module from the upper module through the connecting channel; if corrosion protection and marine organism treatment are newly added on the outer side of the pressure-resistant cabin or an internal server is replaced, the large seabed data center module is lifted to the water surface through the lifting connecting pile leg to perform operation; when the large submarine data center module needs to be returned to a factory for maintenance, the lifting connecting pile legs are lifted to be separated from the large submarine data center module, then ballast water in the large submarine data center module is properly drained to realize floating of the large submarine data center module, the connecting channel is removed, the large submarine data center module is pulled by a tugboat to be horizontally moved out of the jacket notch, and wet towing is carried out on the land for maintenance.
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