LU102089B1

LU102089B1 - Mobile offshore platform

Info

Publication number: LU102089B1
Application number: LU102089A
Authority: LU
Inventors: Hongyan Ding; puyang Zhang; Yaohua Guo; Conghuan Le
Original assignee: Univ Tianjin
Priority date: 2020-08-25
Filing date: 2020-09-25
Publication date: 2021-05-05
Also published as: CN111846132A; CN111846132B

Abstract

The disclosure relates to a mobile offshore platform, comprising an anchor foundation (100), a floating workbench (200) arranged in an upper portion of the anchor foundation; wherein the anchor foundation comprises a foundation box, with a hole being formed in the middle, wherein the floating workbench comprises a workbench body (210), a bottom cabin which is arranged on the bottom of the workbench body, a skirt plate which is arranged on the bottom of the bottom cabin; wherein the workbench body comprises a main cabin which is used for mounting devices and arranged in the middle of the workbench body; and the skirt plate is fitted with the hole on the foundation box in the anchor foundation to be inserted into the seabed reserved by the hole on the foundation box. An offshore wind-driven generator set comprising said mobile offshore platform is also described.

Description

MOBILE OFFSHORE PLATFORM

TECHNICAL FIELD The present invention relates to an offshore working platform, in particular to a mobile offshore platform, and belongs to the technical field of manufacturing and construction of offshore infrastructures.

BACKGROUND OF THE PRESENT INVENTION Small islands on the earth account for the vast majority of islands. Since | the energy and fresh water resources in small islands are limited and the long- distance power transmission or fresh water transportation at sea is not economical and safe, a huge challenge is brought to the development, utilization and construction of islands.

In the prior art, mobile offshore working platforms have been used with conventional power generation devices or even nuclear power stations, seawater desalting devices or the like, to provide residents, enterprises, offshore working platforms or the like in remote seaside areas with energy resources, fresh water and other resources, ensuring their life and production.

Mobile offshore working platforms being studied at present mainly include barge-type working platforms, fully-submerged bottom-sitting working platforms, floating working platforms and artificial reef working platforms. However, at present, only the Russian barge-type floating nuclear power station "AkademikLomonosov" has been built and put into use. These mobile offshore working platforms have the following advantages and disadvantages.

The barge-type working platforms have the characteristics of mobility and flexibility, but have less adaptability to severe sea conditions.

The fully-submerged bottom-sitting working platforms can avoid the influences from severe sea conditions such as tsunami and typhoon, but do not have the self-shifting function. These working platforms need to be moved and installed in place by means of large offshore ships, with low flexibility.

I

The floating working platforms also have the problems of invasion of severe sea conditions and low shifting mobility.

The artificial reef working platforms are similar to onshore working platforms. Practice has proven that artificial islands constructed in the early stage have a great impact on the marine ecological environment. The artificial reef working platforms still have the problems of soft marine soil foundation and low mobility.

Therefore, it is necessary to provide a mobile offshore platform which is easy to operate and can perform operations such as bottom sitting, full submerging, floating and shifting according to the water depths and sea conditions in different sea areas.

SUMMARY OF THE PRESENT INVENTION To solve the above deficiencies, the present invention provides a mobile offshore platform and an offshore wind-driven generator in order that: a mobile offshore platform structure which is safe, reliable and easy to move and has an anchor foundation and a floating workbench is provided, and a mobile offshore platform capable of realizing bottom sitting, full submerging, floating and easily shifting according to the water depths and sea conditions in different sea areas is constructed by the combination of the anchor foundation and the floating workbench, so that the demands for electricity, fresh water and other material resources required for living and production in islands or remote seaside areas and offshore facilities.

A mobile offshore platform is provided, including: an anchor foundation, a floating workbench arranged in an upper portion of the anchor foundation and a plurality of ropes that connect the anchor foundation to the floating workbench.

The anchor foundation includes: an annular foundation box, a limiting unit and a plurality of rope-retractable devices, with a hole being formed in the middie of the foundation box, the limiting unit being arranged on the top of the foundation box in such a way that the limiting unit is coaxial with the foundation mr box and being used to connect the floating workbench and the anchor foundation to realize limiting, and the rope-retractable devices being uniformly arranged on a peripheral sidewall of the foundation box.

The floating workbench includes: a workbench body, an ice-breaking cone ring which is circumferentially arranged around the workbench body and has an outwardly protruded sharp corner, a bottom cabin which is arranged on the bottom of the workbench body, a skirt plate which is arranged on the bottom of the bottom cabin, and rope connecting mechanisms which are arranged around the workbench body and correspond to the rope-retractable devices.

The bottom cabin is matched with the limiting unit, and the height of the bottom cabin is not less than the vertical height of the limiting unit. The bottom cabin has a function of adjusting the floating state and stability of the floating workbench and is used for being clamped with the limiting unit of the anchor foundation to connect the anchor foundation and the floating workbench.

The workbench body is a hollow cylinder having double sidewalls and double top walls, and includes a main cabin which is used for mounting devices and arranged in the middie of the workbench body and a ballast water cabin which is used for adjusting the floating state and stability of the floating workbench and arranged in a lower portion of the workbench body.

The skirt plate includes a plurality of rib plates and third side plates, with the rib plates being radially arranged on the bottom of the bottom cabin by using the center point of the workbench body as a center, and the third side plates being distributed on two sides of the rib plates in a fishbone shape. The skirt plate is fitted with the hole on the foundation box in the anchor foundation to be inserted into the seabed reserved by the hole on the foundation box.

Further, the foundation box of the anchor foundation includes a first bottom plate and a first top plate coaxial with the first bottom plate; the top of a first outer wall plate is connected to the outer periphery of the first top plate, while the bottom thereof is connected to the outer periphery of the first bottom plate; a first inner wall plate is concentric with the first outer wall plate; the top of the Pr L first inner wall plate is connected to an inner edge of the first top plate, while the bottom thereof is connected to an inner edge of the first bottom plate; a plurality of partition plates, which are radially arranged outward along the circumferential center of the foundation box and used for forming a plurality of foundation cabins inside the foundation box, are arranged in the foundation box; and, a through hole for mounting a water/gas inlet/outlet valve to allow the anchor foundation to be lifted up or down as required is formed on the tops of the foundation cabins and on the first top plate that is shielded by the limiting unit.

The limiting unit includes an annular inner wing plate and an annular outer wing plate, with an upper edge of the annular inner wing plate being connected to an upper edge of the annular outer wing plate to form a cone ring having a herringbone protruded longitudinal section, and a lower edge of the annular inner wing plate and a lower edge of the annular outer wing plate being connected to the first top plate, respectively.

The rope-retractable devices are uniformly distributed on the outer side of the first outer wall plate. ; The anchor foundation further includes a pull ring for embedding the anchor foundation into the seabed; the pull ring is detachably arranged on the bottom of the first outer wall plate; a connecting portion is extended from the bottom of the first outer wall plate to connect the first outer wall plate and the pull ring; pin holes are formed on the connecting portion; the pull ring consists of two semicircular ring bodies; and, two ends of each of the two semicircular ring bodies are hinged to the pin holes through a pin shaft.

Further, the foundation box and/or the limiting unit in the anchor foundation is made of any one or a combination of steel, reinforced concrete and a steel- concrete composite structure.

Further, the workbench body of the floating workbench includes a cylindrical outer side plate, an outer top plate, a second bottom plate, an inner side plate, an inner top plate and a ballast water cabin plate; the outer top plate Dun „————“

is arranged on the top of the outer side plate, and the outer periphery of the outer top plate is connected to the outer periphery of the top of the outer side plate; the second bottom plate is arranged on the bottom of the outer side plate, and the outer periphery of the second bottom plate is connected to the outer periphery of the bottom of the outer side plate; the bottom of the inner side plate is fixedly arranged on the second bottom plate, concentric with the outer side plate and located inside the outer side plate; the inner top plate is arranged on the top of the inner side plate and located below the outer top plate, and the outer periphery of the inner top plate is connected to the outer periphery of the top of the inner side plate; and, the ballast water cabin plate is vertically arranged close to the second bottom plate between the outer side plate and the inner side plate, and two ends of the ballast water cabin plate are connected to the outer side plate and the inner side plate, respectively.

The outer side plate, the outer top plate and the second bottom plate form a closed hollow cylinder, the outer side plate and the inner side plate form a double-sidewall structure of the hollow cylinder, and the inner top plate and the outer top plate form a double-top-wall structure. The inner side plate, the inner top plate and the second bottom plate form the main cabin. The ballast water cabin plate, the outer side plate, the inner side plate and the second bottom | plate form the ballast water cabin arranged on the bottom of the hollow cylinder.

Optionally, a plurality of portholes which can be opened or closed are formed on the outer top plate or the outer side plate to form a semi-closed hollow cylinder.

The ice-breaking cone ring has a triangular longitudinal section, and can move up and down on the outer periphery of the workbench body. The ice- breaking cone ring is suitable for breaking ice floes in cold sea areas in winter, and the position of the ice-breaking cone can be adjusted up and down according to the water depth and sea level of the sea area where the ice- breaking cone is used, so that the flexibility and applicability of the ice-breaking cone is realized and the safety of the workbench body is ensured.

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Further, the floating workbench further includes a plurality of platform floor plates and a plurality of platform cabin plates; the platform floor plates are arranged inside the double-sidewall structure and/or the main cabin of the workbench body to partition the interior of the double-sidewall structure and/or the main cabin into a plurality of floors; and, the platform cabin plates are concentric with the outer side plate and the inner side plate to partition each floor into a plurality of operation cabins. The floating workbench arranged in such a way not only can satisfy the installation and application requirements of sea water desalting devices, LNG and oil storage devices, generator sets or even small nuclear power stations, and but also can realize a better living, rest, exercise and entertainment space for the production, management and service personnel on the floating workbench and maintain the physical and mental health of the personnel.

The mobile offshore platform has three operation modes as required.

Fixed connection mode: the anchor foundation is anchored on the seabed, the bottom cabin of the floating workbench is clamped into the limiting unit of the anchor foundation so that the anchor foundation is connected to the floating workbench, and the skirt plate of the floating workbench is inserted into the hole on the foundation box in the anchor foundation matched with the floating workbench so that the mobile offshore platform is inserted into the seabed reserved by the hole on the foundation box.

Semi-floating mode: the anchor foundation is buried and anchored on the seabed, and the floating workbench is semi-floated on the sea by adjusting the ropes in the rope-retractable devices on the anchor foundation.

Fully-submerged mode: the anchor foundation is buried and anchored on the seabed, and the floating workbench is floated on the sea in a fully- submerged manner by adjusting the ropes in the rope-retractable devices on the anchor foundation.

The present invention further provides an offshore wind-driven generator set, including a tower, a wind-driven generator, blades and the mobile offshore EE ————————— I platform described above, the tower being mounted on the top of the workbench body of the mobile offshore platform, the wind-driven generator being mounted on the tower, and the blades being mounted on the wind-driven generator.

Compared with the prior art, the embodiments of the present invention have the following beneficial effects and remarkable progresses.

1. The anchor foundation in the mobile offshore platform provided by the present invention is simple, firm, high in stability and good in stability, can be buried and anchored on the seabed, and can provide a stable foundation for the devices and structures above the anchor foundation. Moreover, the anchor foundation is easy to achieve in-situ manufacturing and installing, and the foundation structure can be lifted up and floated by easy operation such as water drainage, without needing large ocean engineering devices. After being moved in place, the foundation structure can be submerged, buried and fixed | by an operation of filling water, so that an anchor foundation is provided for the devices in the upper layer.

2. The floating workbench in the mobile offshore platform provided by the present invention is simple in structure, safe, high in reliability and large in available space, and can satisfy the requirements of mounting sea water desalting devices, LNG and oil storage devices, generator sets or even small nuclear power stations. The workbench body can perform operations such as bottom sitting, full submerging and floating at sea according to the sea conditions and other requirements, and can be shifted to satisfy various requirements by means of other auxiliary power devices.

3. The anchor foundation and the floating workbench in the mobile offshore platform provided by the present invention are manufactured separately, moved simultaneously, and connected as a whole in a predetermined sea area by ropes, so that operations such as bottom sitting, full submerging, floating and shifting can be performed according to the water depths and sea conditions in different sea areas. The mobile offshore platform is high in mobility, flexibility, adaptability and practicability and easy to construct, satisfies various Pr requirements for living, production or the like in islands, remote seaside areas and offshore facilities. The mobile offshore platform has good social benefits, can provide better economic benefits for enterprises, has a very promising market prospect, and has a high popularization and application value.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a stereoscopic structure diagram of a mobile offshore platform according to an embodiment of the present invention; FIG. 2 is a stereoscopic structure diagram of an anchor foundation of the mobile offshore platform according to an embodiment of the present invention; FIG. 3 is an internal structure diagram of the anchor foundation shown in FIG. 2; FIG. 4 is a sectional view of the anchor foundation shown in FIG. 2; FIG. 5 is a schematic view of the structure and operation process of a pull ring of the anchor foundation shown in FIG. 2; FIG. 6 is a sectional view of a floating workbench of the mobile offshore platform according to an embodiment of the present invention; FIG. 7 is a stereoscopic structure diagram of a skirt plate of the floating | workbench shown in FIG. 6; | FIG. 8 is a schematic view of the operation state of the mobile offshore platform structure according to different water depths according to an embodiment of the present invention, where: FIG. 8-1 shows a state where the floating workbench is connected to and seated on the anchor foundation; and FIGs. 8-1 and 8-2 show floating states where the floating workbench is connected to the anchor foundation by ropes according to different water depths; FIG. 9 is a schematic view of the operation state of the mobile offshore platform structure according to different sea conditions according to an embodiment of the present invention, where:

FIG. 9-1 shows an operation state where the floating workbench is connected to the anchor foundation in a floating manner under good sea conditions; FIG. 9-2 shows an operation state where the floating workbench is connected to the anchor foundation in a semi-submerged manner under severe sea conditions; and FIG. 9-3 shows an operation state where the floating workbench is submerged into the seabed and seated on the anchor foundation under severe sea conditions; and FIG. 10 is a structural diagram of an offshore wind-driven generator set according to an embodiment of the present invention; in which: 100: anchor foundation; 110: foundation box; 111: first bottom plate; 112: first top plate; 113: first outer wall plate; 114: first inner wall plate; 115: partition plate; 120: limiting unit; 121: annular inner wing plate; 122: annular outer wing plate; 130: rope-retractable device; 131: rope; 140: pull ring; 141: pin hole; 142: pin shaft; 150: hole; ‘ | 200: floating workbench; 210: workbench body; 211: outer side plate; 212: outer top plate; 213: second bottom plate; 214: inner side plate; 215: inner top plate; 216: ballast water cabin plate; 220: ice-breaking cone ring; 230: skirt plate; 231: rib plate; 232: third side plate; 240: bottom cabin; 241: second bottom plate; second side plate; 310: tower; 320: wind-driven generator; and, 330: blade.

DETAILED DESCRIPTION OF THE PRESENT INVENTION

To make the objectives, technical solutions, beneficial effects and remarkable progresses of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings provided in the embodiments of the present invention. Apparently, the embodiments described herein are some but not all of the embodiments of the present invention. All | other embodiments obtained on the basis of the embodiments in the present invention by a person of ordinary skill in the art without paying any creative effort shall fall into the protection scope of the present invention.

| It is to be noted that: The term "comprise" and any variations thereof in the specification and claims of the present invention are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, and further optionally includes steps or units that are not listed or optionally includes other steps or units intrinsic to this process, method, product or device.

In the description of the embodiments of the present invention, some indicative orientation or position words used herein are merely based on the orientation or position relationship shown in the drawings in the embodiments of the present invention, and are merely for describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the described device or element must have a particular orientation or be constructed and operated in a particular orientation. Therefore, these words cannot be interpreted as limiting the present invention.

in the present invention, unless otherwise explicitly specified and defined, the terms "mount", "fix", "connect" or the like should be interpreted in a broad sense. For example, it may be fixed connection, detachable or movable connection, or integration; or, it may be direct connection, indirect connection through an intermediate medium, or invisible signal connection; or, it may be internal communication between two elements or interaction between two Da a

| 11 LU102089 elements. Unless otherwise explicitly defined, for a person of ordinary skill in the art, the specific meanings of the terms in the present invention can be | interpreted according to specific conditions.

It is also to be noted that, the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

As shown in FIG. 1, an embodiment of the present invention provides a mobile offshore platform, including: a anchor foundation 100, a floating workbench 200 arranged in an upper portion of the anchor foundation 100 and a plurality of ropes that connect the anchor foundation 100 to the floating workbench 200.

As shown in FIGs. 2-3, the anchor foundation 100 includes: an annular foundation box 110, a limiting unit 120 and a plurality of rope-retractable devices

130. A hole 150 is formed in the middle of the foundation box 110. The limiting unit 120 is arranged on the top of the foundation box 110 in such a way that the limiting unit 120 is coaxial with the foundation box 110, and is used to connect the floating workbench 200 and the anchor foundation 100 to realize limiting. The rope-retractable devices 130 are uniformly arranged on a peripheral sidewall of the foundation box 110.

Further, the foundation box 110 includes a first bottom plate 111 and a first top plate 112 coaxial with the first bottom plate 111. The top of a first outer wall plate 113 is connected to the outer periphery of the first top plate 112, while the bottom thereof is connected to the outer periphery of the first bottom plate 111.

A first inner wall plate 114 is concentric with the first outer wall plate 113. The top of the first inner wall plate 114 is connected to an inner edge of the first top plate 112, while the bottom thereof is connected to an inner edge of the first bottom plate 111. A plurality of partition plates 115, which are radially arranged outward along the circumferential center of the foundation box and used for forming a plurality of foundation cabins inside the foundation box 110 to reinforce the structure, are arranged in the foundation box 110. Through holes Im for mounting water/gas inlet/outlet valves (not shown) to allow the anchor foundation 100 to be lifted up or down as required are formed on the tops of the foundation cabins and on the first top plate 112 that is shielded by the limiting unit 120. The top and bottom of each of the partition plates 115 are resisted against the first bottom plate 111 and the first top plate 112, respectively, and two ends of each of the partition plates 115 are resisted against the first outer wall plate 113 and the first inner wall plate 114, respectively. By draining water/discharging gas from the foundation cabins through the water/gas inlet/outlet valves on the foundation cabins, the dead weight of the anchor foundation 100 is changed, and the anchor foundation 100 is thus lifted up or down.

The outer periphery of each of the first bottom plate 111 and the first top plate 112 is connected to upper and lower sides of the first outer wall plate 113, respectively, and an inner edge of each of the first bottom plate 111 and the first top plate 112 are connected to upper and lower sides of the first inner wall plate 114, respectively, to form a closed, annular and hollow foundation box 110 with a hole 150.

The limiting unit 120 includes an annular inner wing plate 121 and an annular outer wing plate 122. An upper edge of the annular inner wing plate 121 is connected to an upper edge of the annular outer wing plate 122 to form a cone ring having a herringbone protruded longitudinal section, and a lower edge of the annular inner wing plate 121 and a lower edge of the annular outer wing plate 122 are connected to the first top plate 112, respectively.

The rope-retractable devices 130 are uniformly distributed on the outer side of the first outer wall plate 113.

The anchor foundation 100 is simple and firm in structure, high in stability and good in stability, can be buried and anchored on the seabed, and can provide a stable foundation for the devices and structures above the anchor foundation. Moreover, the anchor foundation is easy to manufacture and install in place, and the foundation structure can be lifted up and floated by easy ZN“

operation such as water drainage, without large ocean engineering devices. After being moved in place, the foundation structure can be submerged, buried and fixed by an operation of filling water, so that a stable anchor foundation is provided for the devices in the upper layer.

Further, as shown in FIG. 5, the anchor foundation 100 further includes a pull ring 140 for embedding the anchor foundation 100 into the seabed. The pull ring 140 is detachably arranged on the bottom of the first outer wall plate 113. A connecting portion is extended from the bottom of the first outer wall plate 113 to connect the first outer wall plate 113 and the pull ring 140. Pin holes 141 are formed on the connecting portion. The pull ring 140 consists of two semicircular ring bodies. Two ends of each of the two semicircular ring bodies are hinged to the pin holes 141 through a pin shaft 142.

By providing the pull ring, the anchor foundation can be seated on the seabed by means of the structure of the foundation box itself and can be embedded into the seabed by the pull ring, so that the stability of the foundation structure is further provided, the impact of various ocean currents on the seabed can be better resisted, and a more stable foundation is provided for the devices above the anchor foundation.

In this embodiment, the foundation box 110 and/or the limiting unit 120 in the anchor foundation 100 is made of any one or a combination of steel, reinforced concrete and a steel-concrete composite structure.

Apparently, the anchor foundation provided in this embodiment can be made of different structural material according to different needs, so that different application requirements can be satisfied, and products with better cost performance can be obtained according to the actual investment.

As shown in FIG. 6, the floating workbench 200 includes: a workbench body 210, an ice-breaking cone ring 220 which is externally sleeved around the workbench body 210 and has an outwardly protruded sharp corner, a bottom cabin 240 which is arranged on the bottom of the workbench body 210, a skirt plate 230 which is arranged on the bottom of the bottom cabin 240, and rope DE —

connecting mechanisms (not shown) which are arranged around the workbench body 210 and correspond to the rope-retractable devices 130. The bottom cabin 240 is matched with the limiting unit 120, and the height of the bottom cabin 240 is not less than the vertical height of the limiting unit 120.

The workbench body 210 is a hollow cylinder having double sidewalls and double top walls, and includes a main cabin used for mounting devices, an operation cabin used for allowing workers to work and rest, a ballast water cabin used for adjusting the floating state and stability of the floating workbench 200, and a bottom cabin used for being connected to the anchor foundation 100.

As shown in FIG. 7, the skirt plate 230 includes a plurality of rib plates 231 and third side plates 232. The rib plates 231 are radially arranged below the bottom cabin 240 by using the center point of the workbench body 210 as a center. The third side plates 232 are distributed on two sides of the rib plates 231 in a fishbone shape. When the workbench body 210 completely descends on the seabed, the workbench body can be inserted into the hole 150 on the foundation box 110 in the anchor foundation 100 fitted with the workbench body and then inserted into the seabed reserved by the hole on the foundation box, so that the safety of the workbench body is further ensured.

Further, the workbench body 210 includes a cylindrical outer side plate 211, an outer top plate 212, a second bottom plate 213, an inner side plate 214, an inner top plate 215 and a ballast water cabin plate 216. The outer top plate 212 is arranged on the top of the outer side plate 211, and the outer periphery of the outer top plate 212 is connected to the outer periphery of the top of the outer side plate 211. The second bottom plate 213 is arranged on the bottom of the outer side plate 211, and the outer periphery of the second bottom plate 213 is connected to the outer periphery of the bottom of the outer side plate 211. The inner side plate 214 is fixedly arranged on the second bottom plate 213, concentric with the outer side plate 211 and located inside the outer side plate

211. The inner top plate 215 is arranged on the top of the inner side plate 214 and located below the outer top plate 212, and the outer periphery of the inner

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' LU102089 top plate 215 is connected to the outer periphery of the top of the inner side plate 214. The ballast water cabin plate 216 is vertically arranged close to the second bottom plate between the outer side plate 211 and the inner side plate 214, and two ends of the ballast water cabin plate 216 are connected to the outer side plate 211 and the inner side plate 214, respectively.

The outer side plate 211, the outer top plate 212 and the second bottom plate 213 form a closed hollow cylinder, the outer side plate 211 and the inner side plate 214 form a double-sidewall structure of the hollow cylinder, and the inner top plate 215 and the outer top plate 212 form a double-top-wall structure. The inner side plate 214, the inner top plate 215 and the second bottom plate 213 form the main cabin. The ballast water cabin plate 216, the outer side plate : 211, the inner side plate 214 and the second bottom plate 213 form the ballast water cabin arranged on the bottom of the hollow cylinder.

Optionally, a plurality of portholes (not shown) which can be opened or closed are formed on the outer top plate 212 or the outer side plate 211 to form a semi-closed hollow structure.

The workbench body 210 of the floating workbench 200 is a closed or semi-closed hollow structure having double top walls, double sidewalls, a main cabin and a ballast water cabin. The workbench body is simple in structure, safe, high in reliability and large in available space, and can satisfy the requirements of mounting sea water desalting devices, LNG and oil storage devices, generator sets or even small nuclear power stations. The workbench body can perform operations such as bottom sitting, full submerging and floating at sea according to the sea conditions and other requirements, and can be shifted by means of other auxiliary power devices.

The ice-breaking cone ring 220 has a triangular longitudinal section, and can move up and down on the outer periphery of the workbench body 210. The ice-breaking cone ring 220 is suitable for breaking ice floes in cold sea areas in winter, and the position of the ice-breaking cone can be adjusted up and down according to the water depth and sea level of the sea area where the ice- mama breaking cone is used, so that the flexibility and applicability of the ice-breaking cone is realized and the safety of the workbench body is ensured.

As shown in FIGs. 6, 7, the skirt plate 230 is arranged on the bottom of the bottom cabin 240. When the workbench body 210 is seated on the seabed, the workbench body can be inserted into the hole 150 on the foundation box in the anchor foundation 100 fitted with the workbench body and then inserted into the seabed reserved by the hole on the foundation box, so that the safety of the workbench body is further ensured.

Further, as shown in FIG. 6, the floating workbench 200 in this embodiment further includes a plurality of platform floor plates 217 and a plurality of platform cabin plates 218. The platform floor plates 217 are arranged inside the double-sidewall structure and/or the main cabin of the hollow cylinder and parallel to the second bottom plate 213 to partition the interior of the double- sidewall structure and/or the main cabin into a plurality of floors. The platform cabin plates 218 are concentric with the outer side plate 211 and the inner side plate 214 to partition each floor into a plurality of operation cabins. The floating workbench arranged in such a way not only can satisfy the installation and application requirements of sea water desalting devices, LNG and oil storage devices, generator sets or even small nuclear power stations, and but also can realize a better living, rest, exercise and entertainment space for the production, management and service personnel on the floating workbench and maintain the physical and mental health of the personnel.

Further, the floating workbench 200 further includes a bottom cabin 240 arranged between the workbench body 210 and the skirt plate 230. The platform bottom plate 240 includes a second bottom plate 241 and a second side plate 242. The outer periphery of the second bottom plate 241 corresponds to the inner periphery of the annular inner wing plate 121. The bottom of the second side plate 242 surrounds the outer periphery of the second bottom plate 241, and the top thereof is fixed on the bottom of the second bottom plate 213. The bottom cabin 240 is matched with the annular inner wing plate 121 of the ——————————————————————

limiting unit 120, the height of the bottom cabin is not less than the height of the herringbone protrusion in the limiting unit 120, and the bottom cabin can completely enter a region contained by the inner edge of the annular inner wing plate 121.

This embodiment provides a method for manufacturing an anchor foundation, including the following steps. | A first bottom plate 111 is formed by cutting and splicing a steel plate or pouring reinforced concrete.

A first outer wall plate 113 and a first inner wall plate 114 are formed around the outer periphery and inner edge of the first bottom plate by cutting and splicing a steel plate or pouring reinforced concrete, and the first outer wall plate 113 and the first inner wall plate 114 are connected to the outer periphery and inner edge of the first bottom plate 111, respectively, to from an annular structure.

In the annular structure, a plurality of partition plates 115 arranged radially outward around the circumferential center of the first bottom plate 111 are formed by cutting and splicing a steel plate or pouring reinforced concrete, and two ends of the partition plates 115 are connected to the first outer wall plate 113 and the first inner wall plate 114, respectively, to partition the interior of the annular structure into a plurality of foundation cabins.

A first top plate 112 coaxial with the first bottom plate 111 is constructed on the bottom of the annular structure by cutting and splicing a steel plate or pouring reinforced concrete, and the top of the annular structure is closed by the first top plate to form an annular hollow foundation box 110.

A limiting unit 120 including an annular inner wing plate 121 and an annular outer wing plate 122 is formed on the top of the first top plate 112 by cutting and splicing a steel plate or pouring reinforced concrete, and the outer periphery of the annular inner wing plate 121 is connected to the inner edge of the annular outer wing plate 122 to form a cone ring having a herringbone protruded longitudinal section, so that the limiting unit 120 has been

A manufactured.

A plurality of rope-retractable devices 130 are uniformly mounted on the peripheral sidewall of the first outer wall plate 113, the rope-retractable devices ; 130 are uniformly distributed and vertically/obliquely mounted on the peripheral sidewall of the first outer wall plate 113, and the ropes in the rope-retractable devices 130 can be pulled out from or retracted into the rope-retractable devices in a direction toward the limiting unit 120.

Through holes are formed on the top of the foundation cabins and on the first top plate 112 that is not shielded by the limiting unit 120, and water/gas inlet/outlet valves are mounted in the through holes, so that the anchor foundation 100 has been manufactured.

Optionally, after the water/gas inlet/outlet valves have been mounted in the through holes, a pin hole 141 is extended downward from the bottom of the first outer wall plate 113, and a pull ring is manufactured from steel in segments around the bottom of the first outer wall plate 113. The pull ring 140 consists of two semicircular ring bodies. Two ends of each of the two semicircular ring bodies are movably connected to the pin hole 141 through a pin shaft 142, respectively.

Further, a method for manufacturing the floating workbench includes the following steps.

A skirt plate 230 is manufactured by cutting and splicing a steel plate.

On the skirt plate 230, a bottom cabin 240 is constructed by cutting and splicing a steel plate or pouring reinforced concrete, and a workbench body 210 is then constructed by cutting and splicing a steel plate or pouring reinforced concrete, so that the workbench body including an outer side plate 211, a second bottom plate 213, an outer top plate 212, an inner side plate 214, an inner top plate 215 and a ballast water cabin plate 216 has been manufactured, and the workbench body including the double-sidewall structure, the main cabin and the ballast water cabin has been manufactured.

An ice-breaking cone ring 220 is manufactured in segments by cutting

ALL and splicing a steel plate, and a complete ice-breaking core ring is formed by splicing the ice-breaking core ring in each segment around the outer periphery of the outer side plate 211.

Platform floor plates 217 are constructed inside the double-sidewall structure and/or the main cabin by cutting and splicing a steel plate or pouring reinforced concrete or constructing profiles; and on the platform floor plates, each floor is partitioned into a plurality of operation cabins by cutting and splicing a steel plate or pouring reinforced concrete or constructing profiles.

Rope connecting mechanism corresponding to the rope-retractable devices 130 on the anchor foundation 100 are mounted on the outer periphery of the outer side plate 211, so that the floating workbench has been manufactured.

A method for manufacturing a mobile offshore platform structure includes the following steps.

A anchor foundation is manufactured by the method for manufacturing a anchor foundation.

A floating workbench is manufactured by the method for manufacturing a floating workbench.

The floating workbench is arranged above the anchor foundation, and the ropes in the rope-retractable devices on the anchor foundation are connected : to the rope connecting mechanisms on the floating workbench, so that the mobile offshore platform structure has been manufactured.

FIG. 8 shows a schematic view of the operation state of the mobile offshore platform structure according to different water depths according to an embodiment of the present invention. The curve in this figure shows the water level line. It is indicated that this platform can be applied to sea areas with different water depths. In case of different water depths, the platform can be above the water surface by adjusting the ropes.

FIG. 8-1 shows a schematic view of the operation state of the mobile offshore platform in a shallow sea area. The anchor foundation 100 is buried ————————————

and anchored on the seabed; the bottom cabin 240 of the ficating workbench 200 is clamped into the limiting unit 120 of the anchor foundation 100 so that the anchor foundation is connected to the floating workbench: and, the skirt plate 230 of the floating workbench 200 is inserted into the hole 150 on the foundation box 110 in the anchor foundation 100 matched with the floating workbench, so that the mobile offshore platform is inserted into the seabed reserved by the hole on the foundation box. FIGs. 8-2,8-3 show schematic views of the operation state of the mobile offshore platform in a deep sea area. The anchor foundation 100 is buried and anchored on the seabed, the floating workbench 200 is semi-floated or fully-submerged in the sea according to specific requirements, and the anchor foundation 100 on the bottom and the floating workbench 200 in the upper portion are tensioned by the ropes.

FIG. 9 shows a state of the floating workbench of the mobile offshore platform of the present invention according to different sea conditions. To clearly show the position of the floating workbench relative to the water surface, the curve in the upper part of this figure is a water surface line.

As shown in FIG. 9-1, the floating workbench is semi-floated. In case of severe weather such as typhoon, the floating workbench can be fully submerged by the ropes (as shown in FIG. 9-2, the floating workbench is fully submerged in the sea); or, as shown in FIG. 9-3, the anchor foundation and the floating workbench are connected and then seated on the seabed, so that the influence from the severe weather is actively avoided, and the safety of the mobile offshore platform structure is ensured.

When the mobile offshore platform structure is to be shifted, the anchor foundation can be lifted up by easy operations such as water drainage, without needing large ocean engineering devices. After being moved in place, the anchor foundation can be buried in place again by a reserve operation.

During the shifting and floating transportation of the mobile offshore platform structure, the anchor foundation and the floating workbench are separated. The anchor foundation and the floating workbench are connected Le by ropes, and the anchor foundation is located below the floating workbench. Accordingly, the height of the center of gravity of the floating workbench can be decreased, and the stability of the floating workbench during the shifting and floating transportation can be greatly improved.

Embodiment 1 oo This embodiment provides an extended application embodiment of the mobile offshore platform structure, particularly an offshore wind-driven generator set.

FIG. 10 shows the offshore wind-driven generator set according to this embodiment of the present invention, including: a tower 310, a wind-driven generator 320, blades 330 and the mobile offshore platform described above, wherein the tower 310 is mounted on the outer top plate 212 of the workbench body of the mobile offshore platform, the wind-driven generator 320 is mounted on the tower 310, and the blades 330 are mounted on the wind-driven generator 320.

Embodiment 2 An example of manufacturing, moving, positioning and using the mobile offshore platform is provided.

Firstly, the floating workbench 220 and the anchor foundation 100 are constructed in a wharf or dock, and the floating workbench 200 is seated on the anchor foundation 100, as shown in FIG. 8-1.

Corresponding devices such as a small nuclear power station, a sea water desalting device and an LNG or oil storage device are mounted in the main cabin in the floating workbench 200 according to the requirements.

Then, water is injected into the dock. The floating workbench and the anchor foundation are floated by using the buoyancy generated by the operation cabins and the main cabin in the floating workbench as well as the foundation box of the anchor foundation. Since the floating workbench and the anchor foundation have excellent floating stability, they can be floated by themselves without additional floating measures. The floating workbench and ALLEN.

the anchor foundation after floating are towed away from the dock/wharf area by a towboat. Due to the low water depth and small wind waves in the dock/wharf area, the floating workbench and the cylindrical foundation are connected and not separated, and are kept in a state shown in FIG. 8-1.

Subsequently, the floating workbench and the anchor foundation are towed to a sea lane from the dock/wharf by the towboat.

Since the floating transportation needs to last for a long distance, severe sea conditions may be encountered during the floating transportation. Therefore, it is necessary to further improve the stability of the floating workbench and improve the safety and stability of the floating transportation. For this purpose, the anchor foundation can be separated from the floating workbench, the anchor foundation is dropped directly below the floating workbench, and the anchor foundation and the floating workbench are connected by ropes, as shown in FIG. 8-2. At this time, since the floating workbench 200 falls under the pull-down action of the anchor foundation 100, the center of gravity of the floating workbench 200 and the anchor foundation 100 as a whole is moved down, so that the stability of the whole structure is improved.

When the floating workbench 200 and the anchor foundation 100 are floated to a specified sea area, the foundation box of the anchor foundation is filled with water and then lowered by ropes. When the anchor foundation is buried due to the dead weight, draining water/discharging gas or other measures, the anchor foundation is further leveled by means of the plurality of foundation cabins of the anchor foundation, until the levelness of the anchor | foundation is adjusted to be within the desired range. So far, the anchor foundation is submerged in place.

Then, according to the water depth of the target sea area, the floating workbench 200 is sat on the bottom or suspended, as shown in Fig. 8.

When the target sea area is shallow, the floating workbench can be lowered, and the skirt plate of the floating workbench is directly inserted into the seabed mud after passing through the middle hole in the middle of the anchor foundation.

At this time, the floating workbench and the anchor foundation are connected firmly to bear an external load together.

When the target sea area is deep, after the anchor foundation is mounted in place, the floating workbench can adjust its own underwater penetration ; flexibly by ropes, so that the floating workbench is located in place.

After the floating workbench is located in place, according to the sea level of the target sea area, the ice-breaking cone bring in the floating workbench located in place is adjusted up and down to resist against the invasion of sea ice.

To enhance the anti-pull and anti-overturning capability of the anchor foundation, in Embodiment 1 of the present invention, as an improved technical solution, a pull ring is further arranged on the anchor foundation.

In this case, after the anchor foundation is submerged in place, the ropes are released, and the pull ring can be rotated about the pin shaft to be embedded into the seabed in case of an extreme sea condition, so that the anchor foundation is further anchored.

When there is an extreme sea condition in the operating sea area, for example, when a severe sea condition such as typhoon or tsunami is going to attack the floating workbench, the floating workbench can be submerged urgently by adjusting the ropes to actively avoid the invasion of typhoon or tsunami, as shown in FIG. 9. When the mobile offshore platform structure is to be shifted due to various reasons, the ropes are tensioned, a part of sea water in the foundation box is drained, and the buried structure of the anchor foundation is gradually lifted up and moved away from the soil by injecting air into the foundation box of the anchor foundation.

At this time, the ropes are gradually tensioned.

After the anchor foundation is completely moved away from the soil, the position of the anchor foundation is further adjusted by the ropes.

After the water depth requirement of the sea lane is satisfied, the ropes are locked, and the floating ee I workbench and the anchor foundation are towed as a whole to a next target sea area by the towboat, so that the floating and shifting are completed, and the mobile offshore platform structure needs to be positioned, anchored and operated in a new sea area.

In conclusion, in the mobile offshore platform structure provided by the present invention, the anchor foundation and the floating workbench can be manufactured separately, moved simultaneously, and connected as a whole in a predetermined sea area by ropes, so that operations such as bottom sitting, full submerging, floating and shifting can be performed according to the water depths and sea conditions in different sea areas. The mobile offshore platform structure is high in mobility, flexibility, adaptability and practicability and easy to construct, can be expanded in various forms as required, and can satisfy the installation and application requirements of sea water desalting devices, LNG and oil storage devices, generator sets or even small nuclear power station and satisfy various requirements for living, production or the like in islands, remote seaside areas and offshore facilities. The mobile offshore platform structure has good social benefits, can provide better economic benefits for enterprises, has a very promising market prospect, and has a high popularization and application value.

The foregoing embodiments and specific examples are merely for describing the technical solutions of the present invention and not intended to limit the present invention. Although the present invention has been described in details by the foregoing embodiments, it should be understood by a person of ordinary skill in the art that modifications may be made to the technical solutions recorded in the foregoing embodiments or equivalent replacements may be made to some or all of the technical features, and these modifications or replacements shall not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention. Non-essential improvements and adjustments or replacements made according to the content of this specification by those skilled in the art shall fall into the protection scope of the present invention.

Claims

1. A mobile offshore platform, comprising: an anchor foundation (100), a floating workbench (200) arranged in an upper portion of the anchor foundation (100) and a plurality of ropes (131) that connect the anchor foundation (100) to the floating workbench (200); wherein the anchor foundation (100) comprises: an annular foundation box | (110), a limiting unit (120) and a plurality of rope-retractable devices (130), with a hole (150) being formed in the middle of the foundation box (110), the limiting unit (120) being arranged on the top of the foundation box (110) in such a way that the limiting unit (120) is coaxial with the foundation box (110) and being used to connect the floating workbench (200) and the anchor foundation (100) to realize limiting, and the rope-retractable devices (130) being uniformly arranged on a peripheral sidewall of the foundation box; the floating workbench (200) comprises: a workbench body (210), an ice- breaking cone ring (220) which is circumferentially arranged around the workbench body (210) and has an outwardly protruded sharp corner, a bottom cabin (240) which is arranged on the bottom of the workbench body (210), a skirt plate (230) which is arranged on the bottom of the bottom cabin (240), and rope connecting mechanisms which are arranged around the workbench body (210) and correspond to the rope-retractable devices (130); the bottom cabin (240) is matched with the limiting unit (120), and the height of the bottom cabin (240) is not less than the vertical height of the limiting unit (120); wherein the workbench body (210) is a hollow cylinder having double sidewalls and double top walls, and comprises a main cabin which is used for mounting devices and arranged in the middle of the workbench body and a ballast water cabin which is used for adjusting the floating state and stability of the floating workbench (200) and arranged in a lower portion of the workbench body; and the skirt plate (230) is fitted with the hole (150) on the foundation box (110)

ALL in the anchor foundation (100) to be inserted into the seabed reserved by the hole on the foundation box.

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2. The mobile offshore platform according to claim 1, wherein: | the foundation box (110) of the anchor foundation (100) comprises a first bottom plate (111) and a first top plate (112) coaxial with the first bottom plate; the top of a first outer wall plate (113) is connected to the outer periphery of the first top plate (112), while the bottom thereof is connected to the outer periphery of the first bottom plate (111); a first inner wall plate (114) is concentric with the first outer wall plate (113); the top of the first inner wall plate (114) is connected to an inner edge of the first top plate (112), while the bottom thereof is connected to an inner edge of the first bottom plate (111); a plurality of partition plates (115), which are radially arranged outward along the circumferential center of the foundation box (110) and used for forming a plurality of foundation cabins inside the foundation box (110), are arranged in the foundation box (110); and through holes for mounting water/gas inlet/outlet valves are formed on the first top plate that is shielded by the limiting unit (120); and the limiting unit (120) comprises an annular inner wing plate (121) and an annular outer wing plate (122), with an upper edge of the annular inner wing plate (121) being connected to an upper edge of the annular outer wing plate (122) to form a cone ring having a herringbone protruded longitudinal section, and a lower edge of the annular inner wing plate (121) and a lower edge of the annular outer wing plate (122) being connected to the first top plate (112), respectively.

3. The mobile offshore platform according to claim 2, wherein the anchor foundation (100) further comprises a pull ring (140) for embedding the anchor foundation (100) into the seabed; the pull ring (140) is detachably arranged on the bottom of the first outer wall plate (113); a connecting portion is extended from the bottom of the first outer wall plate to connect the first outer wall plate and the pull ring; pin holes are formed on the connecting portion; the pull ring consists of two semicircular ring bodies; and, two ends of each of the two ————————————————

semicircular ring bodies are hinged to the pin holes through a pin shaft.

4. The mobile offshore platform according to claim 1, wherein the foundation box (110) and/or the limiting unit (120) in the anchor foundation (100) is made of any one or a combination of steel, reinforced concrete and a steel- concrete composite structure.

5. The mobile offshore platform according to claim 1, wherein the ice- breaking cone ring (220) has a triangular longitudinal section, and can move up and down on the outer periphery of the workbench body (210).

6. The mobile offshore platform according to claim 1, wherein the skirt plate (230) comprises a plurality of rib plates (231) and third side plates (232), with the rib plates (231) being radially arranged on the bottom of the bottom cabin (240) by using the center point of the workbench body (210) as a center, and the third side plates (232) being distributed on two sides of the rib plates in | a fishbone shape.

7. The mobile offshore platform according to claim 1, wherein: the workbench body (210) of the floating workbench (200) comprises a cylindrical outer side plate (211), an outer top plate (212), a second bottom plate (213), an inner side plate (214), an inner top plate (215) and a ballast water cabin plate (216); the outer top plate (212) is arranged on the top of the outer side plate (211), and the outer periphery of the outer top plate (212) is connected to the outer periphery of the top of the outer side plate (211); the second bottom plate (213) is arranged on the bottom of the outer side plate (211), and the outer periphery of the second bottom plate (213) is connected to the outer periphery of the bottom of the outer side plate (211); the bottom of the inner side plate (214) is fixedly arranged on the second bottom plate (213), concentric with the outer side plate (211) and located inside the outer side plate (211); the inner top plate (215) is arranged on the top of the inner side plate (214) and located below the outer top plate (212), and the outer periphery of the inner top plate (215) is connected to the outer periphery of the top of the inner side plate (214); and, the ballast water cabin plate (216) is vertically arranged close to the second bottom plate between the outer side plate (211) and the inner side plate (214), and two ends of the ballast water cabin plate (216) are connected to the outer side plate (211) and the inner side plate (214), respectively; and | | the outer side plate (211), the outer top plate (212) and the second bottom plate (213) form a closed hollow cylinder, the outer side plate (211) and the inner side plate (214) form a double-sidewall structure of the hollow cylinder, and the inner top plate (215) and the outer top plate (212) form a double-top- wall structure; the inner side plate (214), the inner top plate (215) and the second bottom plate (213) form the main cabin; and, the ballast water cabin plate (216), the outer side plate (211), the inner side plate (214) and the second bottom plate (213) form the ballast water cabin arranged on the bottom of the hollow cylinder.

8. The mobile offshore platform according to claim 7, wherein a porthole which can be opened or closed is formed on the outer top plate (212) or the outer side plate (211).

9. The mobile offshore platform according to claim 7, wherein: the floating workbench (200) further comprises a plurality of platform floor plates (217) and a plurality of platform cabin plates (218); the platform floor plates (217) are arranged inside the double-sidewall structure and/or the main cabin of the workbench body to partition the interior of the double-sidewall structure and/or the main cabin into a plurality of floors; and, the platform cabin plates (218) are concentric with the outer side plate (211) and the inner side plate (214) to partition each floor into a plurality of operation cabins. |

10. The mobile offshore platform according to claim 1, wherein the anchor foundation (100) and the floating workbench (200) are connected in any one or more of the following connection modes: a fixed connection mode, a semi- floating mode and a fully-submerged mode; wherein: the fixed connection mode: the anchor foundation is anchored on the ZN.

seabed, the bottom cabin (240) of the floating workbench (200) is clamped into the limiting unit (120) of the anchor foundation (100) so that the anchor foundation is connected to the floating workbench, and the skirt plate (230) of the floating workbench (200) is inserted into the hole (150) on the foundation box (110) in the anchor foundation (100) matched with the floating workbench so that the mobile offshore platform is inserted into the seabed reserved by the hole on the foundation box; the semi-floating mode: the anchor foundation (100) is buried and anchored on the seabed, and the floating workbench (200) is semi-floated on the sea by adjusting the ropes (131) in the rope-retractable devices (130) on the anchor foundation (100); and the fully-submerged mode: the anchor foundation (100) is buried and anchored on the seabed, and the floating workbench (200) is floated on the sea in a fully-submerged manner by adjusting the ropes (131) in the rope- retractable devices (130) on the anchor foundation (100).

11. An offshore wind-driven generator set, comprising a tower, a wind- driven generator, blades and the mobile offshore platform according to any one of the preceding claims, the tower being mounted on the top of the workbench body (210) of the mobile offshore platform, the wind-driven generator being mounted on the tower, and the blades being mounted on the wind-driven generator.

ZN