CN218751294U - A flotation pontoon subassembly and offshore platform for offshore platform - Google Patents

Abstract

The application discloses a flotation pontoon subassembly and offshore platform for offshore platform, wherein, the flotation pontoon subassembly includes: the device comprises N cylinders with buoyancy and a frame structure for fixing the N cylinders, wherein the value of N is an integer greater than or equal to 1; the N cylinders are fixed in the frame structure; the N barrels have closed hollow cavities and are made of light materials with corrosion resistance. Therefore, the floating barrel is fixed through the frame structure, and the weight of the buoy assembly can be obviously reduced. Meanwhile, compared with a buoy with a steel structure, the material and construction cost is reduced. And the corrosion resistance is also increased by the barrel body made of light materials with corrosion resistance.

Description

A flotation pontoon subassembly and offshore platform for offshore platform

Technical Field

The present application relates to the field of pontoons, and more particularly, to a pontoon assembly for an offshore platform and an offshore platform.

Background

The offshore floating structure is a foundation for constructing an offshore platform, and the existing offshore floating structure is usually a steel hull and is formed by combining a plurality of steel buoys. For example, the vertical column floating type wind power foundation is designed in a manner that a stiffened plate is adopted in the steel ship body, and is used for providing buoyancy and stability for the floating body and resisting external water pressure or bearing other internal and external loads.

However, steel structural buoys are typically heavy, costly to material and construct, and also susceptible to seawater corrosion.

SUMMERY OF THE UTILITY MODEL

A spar assembly for an offshore platform is provided to achieve a reduced spar weight and to improve the durability of the spar assembly while reducing the manufacturing cost of the spar assembly.

In a first aspect, the present application provides a buoy assembly for an offshore platform, comprising: n cylinders with buoyancy and a frame structure for fixing the N cylinders, wherein the value of N is an integer greater than or equal to 1; the N cylinders are fixed in the frame structure; the N barrels have closed hollow cavities and are made of light materials with corrosion resistance.

In some possible embodiments, the frame structure includes M compartments, at least one of the N cylinders is fixed in one of the M compartments, and a value of M is an integer greater than or equal to 1 and less than or equal to N.

In some possible embodiments, the cylinders fixed in one compartment are uniformly distributed in the compartment, and the top and the bottom of each cylinder are respectively attached to the compartment in the vertical direction of the sea level.

In some possible embodiments, the compartment comprises a central column inside which the cylinder is fixed by co-action with the compartment.

In some possible embodiments, the cylinders in each compartment are placed equiangularly evenly distributed around the central column.

In some possible embodiments, the N cylinders are ring structures with a through hole in the center, and the size of the through hole is greater than or equal to that of the central column; the cylinder body in each compartment is sleeved on the central column through a through hole.

In some possible embodiments, the buoy assemblies are distributed in Y layers in the vertical direction of the sea level, and the value of Y is an integer greater than or equal to 1 and less than or equal to N; the number of each layer of cylinder bodies is the same, and the cylinder bodies are connected end to end in the vertical direction of the sea level.

In some possible embodiments, an enclosing wall structure is arranged between two cylinders which are connected end to end; wherein, the enclosure wall structure cladding is in the connecting portion of two barrels to enclose into confined space with the surface of two barrels.

In some possible embodiments, the buoy assembly further comprises a ballast structure disposed at an end of the frame structure submerged at sea level; wherein the ballast structure is configured to lower the center of gravity of the buoy assembly.

In some possible embodiments, the frame structure is made of a rigid material, the surface of which is coated with a corrosion-resistant coating.

In a second aspect, embodiments of the present disclosure provide an offshore platform, comprising: a truss platform; one or more buoy assemblies as provided in any of the preceding claims; the buoy component is fixedly connected with the truss platform and used for providing buoyancy for the truss platform.

Compared with the prior art, the technical scheme provided by the application has the beneficial effects that:

in the application, the barrels of the N closed hollow cavities are fixed together through a frame structure, buoyancy is provided by the N barrels together, and the barrels are made of light materials with corrosion resistance. Therefore, the buoyancy barrel is fixed through the frame structure, and the weight of the buoy assembly can be obviously reduced. Meanwhile, compared with a buoy with a steel structure, the material and construction cost is reduced. And the corrosion resistance is also increased by the barrel made of light materials with corrosion resistance.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

FIG. 1 is a schematic illustration of a steel buoy structure of the related art;

FIG. 2 is a schematic structural view of a buoy assembly in an embodiment of the present application;

FIG. 3 is a schematic view of a frame structure in an embodiment of the present application;

FIG. 4 is a schematic structural view of another embodiment of a spar assembly according to the present disclosure;

FIG. 5 is a schematic structural view of another embodiment of a buoy assembly of the present application;

FIG. 6 is a schematic structural view of another embodiment of a buoy assembly of the present application;

FIG. 7 is a schematic structural view of an alternative embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of an offshore platform in an embodiment of the present application.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

In order to explain the technical means of the present application, the following description will be given by way of specific examples.

The offshore platform can be fixed on the sea or movably float on the sea, and can provide an offshore operation platform for production operation or other activities. The device is widely applied to providing fixed observation platforms for building lighthouses, radar stations, hydrometeorological observation stations and the like, and providing large-scale operation platforms for building offshore wharfs, drilling and mining submarine petroleum oil and gas exploitation, fishery fishing, energy generation and the like.

The primary structure that enables an offshore platform to float on the surface of the sea is a buoyant floating structure, typically a buoyant pontoon. Most of existing offshore floating structures are steel buoy structures in a three-upright-column or four-upright-column mode, and the steel buoy structures are mainly formed by combining a plurality of steel hollow cylinders. Such as a steel pontoon structure in the form of a three-column structure as shown in fig. 1. The pontoon structure comprises three hollow steel barrels 11 and a connecting column 12 for fixing the barrels. The end of the cylinder body sinking to the sea level is provided with an opening. The steel cylinder 11 may also be designed with a ribbed plate inside to provide buoyancy and stability for the floating body and resist external water pressure, or bear other internal and external loads. However, steel construction buoys have the disadvantages of being heavy, costly in both material and construction, and also susceptible to seawater corrosion.

To solve the above problems, embodiments of the present application provide a buoy assembly for an offshore platform, which can be applied to the above offshore platform to provide buoyancy for the offshore platform floating on the sea surface.

Fig. 2 is a schematic structural diagram of a buoy assembly for an offshore platform according to an embodiment of the present application, and referring to fig. 2, the buoy assembly 20 may include: n cylinders 21 having buoyancy, and a frame structure 22 for fixing the N cylinders 21. Specifically, the value of N is an integer greater than or equal to 1, and the N cylinders 21 are fixed in the frame structure 22. Wherein the N barrels 21 have closed hollow cavities and are made of a lightweight material having corrosion resistance.

It can be understood that the cylinder 21 having the hollow cavity has a smaller weight as a whole than that of the cylinder 21 having the solid cavity in the same volume. Therefore, based on the principle of buoyancy, the cylinder 21, which is lighter in weight and larger in volume, can have greater buoyancy. Meanwhile, the closed space also ensures that the hollow cavity is not filled with seawater, and the usability of the cylinder assembly 20 is also ensured.

In addition, since the buoy assembly 20 needs to be wholly or partially submerged in seawater, which is highly corrosive, the cylinder 21 can be made of a material having corrosion resistance in order to ensure a longer lifetime of the buoy assembly. For example, it may be made of Polytetrafluoroethylene (PTFE), rubber, etc.

In one embodiment, the shape of the barrel 21 may be any shape that can be placed on the frame structure 22. Such as ellipsoidal, cylindrical, spherical, etc. The shape of the N cylinders 21 may be the same or different, as long as the plurality of cylinders 21 are placed in the frame structure 22, and the buoy assembly 20 has stability as a whole, which is not limited in the embodiment of the present application.

For example, the N buoys 21 may be two ellipsoidal cylinders and two cylindrical cylinders, and each two cylinders 21 may be arranged in the same structure of the cylinders 21 in the diagonal direction.

In one embodiment, the frame structure 22 may be made of a rigid material with a corrosion-resistant coating on the surface.

It can be understood that the N cylinders 21 are fixed together by the frame structure 22, and in order to ensure that the N cylinders 21 do not scatter in the frame structure 22, the material for manufacturing the frame structure 22 must have certain rigidity. While the frame structure 22 itself requires the use of lighter materials in order to ensure a lighter overall weight of the buoy assembly 20. For example, the frame structure 22 may be a hollow stainless steel tube, and may be made of any other rigid lightweight metal or non-metal material, which is not limited in the embodiments of the present application.

In addition, since the frame structure 22 is also required to be wholly or partially submerged under the sea level as the cylinder 21, the corrosion of the frame structure 22 by seawater can be reduced by coating a layer of corrosion-resistant coating on the surface of the frame structure 22, and the frame structure 22 can be protected to a certain extent. Also, since the frame structure 22 is in direct contact with seawater, the corrosion-resistant coating chosen needs to be at least water-resistant.

In one possible embodiment, N cylinders 21 are fixedly arranged in M compartments, respectively, in a frame structure 22. Fig. 3 is a schematic structural diagram of the frame structure 22 in the embodiment of the present application, and refer to fig. 3: the frame structure 22 includes M compartments 23, and at least one cylinder 21 of the N cylinders 21 is fixed in one compartment 23 of the M compartments 23. Wherein, the value of M is an integer which is more than or equal to 1 and less than or equal to N.

It can be understood that the N separately arranged cylinders 21 can be respectively fixed in the frame structure 22, and when one or more cylinders 21 need to be replaced, only the cylinder 21 in the corresponding compartment 23 needs to be replaced, and the cylinders 21 in the other compartments 23 are not affected. And even if one or more of the barrels in the compartment 23 are damaged, the buoy assembly 20 is stable as a whole due to the fixation of the frame assembly 22, and the damage to part of the barrels 21 does not affect other barrels. Therefore, the plurality of compartments 23 are arranged to separate the N cylinders 21, so that the overall stability of the buoy assembly 20 is high, and meanwhile, the replacement of part of the cylinders 21 is facilitated.

In one embodiment, the number of cartridges 21 secured within each compartment 23 is the same.

It will be appreciated that the number of compartments 23 may be the same as the number of barrels 21, in which case each barrel 21 may be individually disposed within one compartment 23. Alternatively, the number of the cylinders 21 may be an integral multiple of the number of the compartments 23.

Illustratively, the number of cylinders 21 may be 2 times the number of compartments 23, and in this case, 2 cylinders 21 may be fixed in each compartment 23. When the number of the cylinders 21 is 3 times of the number of the compartments 23, 3 cylinders 21 may be fixed in each compartment 23.

In other possible embodiments, the number of cylinders 21 fixed in each compartment 23 is different.

It will be appreciated that in order to ensure the stability of the buoy assembly 20 as a whole, symmetry needs to be maintained between the compartments 23 when the number of cylinders 21 secured in each compartment 23 is different. Therefore, the center of the buoy assembly is ensured to be positioned at the center of the buoy assembly, so that the buoy assembly cannot deflect when being placed on the water surface.

Illustratively, the value of N is 5, and 5 cylinders 21 are included in this case. The number of the compartments 23 is 3, which are respectively A, B and C, and the three compartments 23A, B and C are arranged in a line. The space sizes of the two A and C compartments are the same, two cylinders 21 can be fixed, and one cylinder can be fixed by the compartment B. 5 identical cylinders 21 are respectively fixed in the three compartments A, B and C.

In a possible embodiment, the cylinders 21 fixed in one compartment 23 are uniformly distributed in the compartment 23, and each cylinder 21 is attached to the compartment 23 at the top and the bottom of the cylinder 21 in the vertical direction of the sea level.

It should be understood that when a plurality of cylinders 21 are contained in one compartment 23, in order to ensure that the compartment 23 is uniformly stressed, it is necessary to uniformly distribute the cylinders 21. For example, one compartment 23 may contain 3 cylinders 21, each of which has the same ellipsoidal shape. The three cylinders 21 may be arranged in a row in the compartment 23, or may be attached to each other and arranged in an equilateral triangle. Or one compartment 23 can contain 4 cylinders 21, and the 4 cylinders 21 can be arranged in a row or in two rows and two columns to be attached to each other. The specific placement of the cylinder 21 may be determined based on the design requirement of the offshore platform or the size of the compartment 23, which is not specifically limited in this embodiment of the application.

In a possible embodiment, a central pillar 41 may be further included in the compartment 23, and the central pillar 41 is used for fixing the cylinder 21 in cooperation with the compartment 23.

Referring to fig. 4, fig. 4 is a schematic structural view of a buoy assembly in an embodiment of the present application, wherein (a) in fig. 4 is a front view of the buoy assembly 20 in the embodiment of the present application, and (b) is a top view of the buoy assembly 20 in the embodiment of the present application. The central column 41 is arranged in the center of the compartment 23, 4 cylinder bodies 21 are contained in the compartment 23, and the 4 cylinder bodies 21 are uniformly distributed around the central column 41 at equal angles.

It can be understood that, by arranging the plurality of barrels 21 around the central column 41 at equal angles, the barrels 21 can be fixed through the partition 23, and meanwhile, the central space surrounded between the barrels 21 is supported by the central column 41, so that the barrels 21 can be further fixed, and the stability of the buoy assembly 20 is improved.

In a possible embodiment, the N cylinders 21 are annular structures with through holes at the centers, and the size of the through holes is larger than or equal to that of the central column 41;

wherein, the cylinder 21 in each compartment 23 is sleeved on the central column 41 through a through hole.

In one embodiment, the size of the through hole may be exactly the same as the size of the central column 41, and the cylinder 21 may be completely fixed when the cylinder 21 is sleeved on the central column 41. Or the size of the through hole can be slightly larger than that of the central column 41, and the cylinder body 21 is sleeved on the central column 41 and cannot be locked due to too large friction force when the cylinder body 21 is replaced.

It can be understood that the cylinder 21 is fixed by the frame 22, and when the cylinder 21 is fixed by being sleeved on the central column 41, the cylinder 21 will not be dispersed around under the action of the central column 41. At this time, the frame structure 22 may include only a portion connected to both ends of the center pillar 41. So, barrel 21 cup joints on center post 41, and the top and the bottom of barrel 21 pass through frame construction 22 fixedly in the vertical direction of coastal level, and barrel 21 can not need all around the frame also can be fixed, can effectively alleviate the holistic weight of flotation pontoon subassembly 20. In addition, the cylinder 21 is made into an annular structure with a through hole, so that the cylinder 21 can be directly sleeved on the central column 41, the cylinder 21 can be better fixed in the separation bin 23, and meanwhile, the cylinder 21 is convenient to replace.

In a possible embodiment, the buoy assembly 20 is distributed in Y layers in the vertical direction of the sea level, and the value of Y is an integer greater than or equal to 1 and less than or equal to N;

wherein, the number of the cylinders 21 on each layer is the same, and the cylinders 21 are connected end to end in the vertical direction of the sea level.

It can be understood that, by designing the buoy assembly 20 as a multi-layer structure, and arranging the same number of cylinders 21 on each layer, the area occupied by the buoy assembly 20 in the plane vertical direction can be effectively reduced under the condition that the number of the cylinders 21 is kept unchanged, and the size requirements of different offshore platforms can be better adapted.

For example, referring to fig. 5, (a) in fig. 5 is a front view of the float assembly 20 in the present embodiment, and (b) a top view of the float assembly 20 in the present embodiment. The buoy assembly 20 is designed to be double-layer distributed in the vertical direction of the sea level, each layer comprises four cylinder bodies 21, and every two cylinder bodies 21 are connected end to end in the vertical direction of the sea level and are placed in the same compartment 23.

In a possible embodiment, a surrounding wall structure 61 is further included between the two barrels 21 connected end to end.

Referring to fig. 6, the enclosing wall structure 61 covers the connecting portion of the two cylinders 21 and encloses a sealed space with the outer surfaces of the two cylinders 21.

Specifically, when the cylinder 21 may have a shape such as an ellipsoid or a sphere, the plurality of cylinders 21 may not be completely attached to each other. When the buoy assembly 20 is designed to be a multi-layer structure, the contact surface between every two cylinders 21 has a certain clearance. The seawater has certain fluidity, and the buoyancy of the cylinder 21 changes due to the change of the height of the buoy 21 from the water line. Since there is a gap between two barrels 21 in the vertical direction of sea level, the two buoys 21 are subjected to inconsistent buoyancy, and therefore, it is necessary to connect the two buoys 21 into a whole by providing the surrounding wall structure 61.

Illustratively, the enclosure wall structure 61 may be a bendable steel plate, or other waterproof material having flexibility. The surrounding wall structure 61 may be fixed to the connection portion between the two buoys 21 by means of adhesion, or a fastening structure may be provided to fix the surrounding wall structure 61 to the cylinder 21. The manner in which the wall structure is connected to the barrel 21 is not intended to limit the scope of the present application.

In one possible embodiment, to balance the buoyancy of buoy assembly 20 with the weight of buoy assembly 20 itself, or to design the depth of buoy assembly 20 when acting below sea level based on design requirements, a ballast structure 71 may be added to buoy assembly 20, see FIG. 7, to lower the center of gravity of buoy assembly 20.

Specifically, the ballast structure 71 is provided at the end of the frame structure 22 submerged at sea level.

It will be appreciated that offshore platforms providing different functions may need to be secured at different locations offshore, for example offshore docks may need to provide offshore platforms that extend above sea level, lighthouses using tidal power generation may require generator sets to be submerged below sea level, etc. Thus, by adding ballast structures 71 of different weights and sizes to enable buoy assembly 20 to float to different depths and also in the sea, buoy assembly 20 is made to meet different functional requirements offshore work platforms.

Illustratively, the ballast structure 71 may be cast using concrete. The ballast structure 71 is cast using concrete, which not only has a low manufacturing cost, but also can be formed in a shape that is suitable for the shape of the cylinder 21, so that the ballast structure 71 and the cylinder 21 can be attached to each other by bending, and the ballast structure 71 and the cylinder 21 are formed as an integral structure without a gap therebetween. The situation that the buoyancy force is inconsistent due to the change of the water line does not exist, and the stability of the buoy assembly 20 is improved.

Alternatively, ballast structure 71 may be an integral structure that is fixedly attached to frame structure 22 during manufacture, or may be a separate peripheral module, ballast structure 71 being removably secured directly to buoy assembly 20, and the center of gravity of buoy assembly 20 being changeable by replacing ballast structures 71 of different weights.

In the embodiment of the application, the buoy assembly comprises N cylinders with buoyancy and a frame structure for fixing the N cylinders, wherein the N cylinders are fixed in the frame structure; the N cylinders are provided with closed hollow cavities and are made of light materials with corrosion resistance. Therefore, the floating barrel is fixed through the frame structure, and the weight of the buoy assembly can be obviously reduced. Meanwhile, compared with a buoy with a steel structure, the material and construction cost is reduced. And the corrosion resistance is also increased by the barrel body made of light materials with corrosion resistance.

Based on the same inventive concept, the embodiment of the present application provides an offshore platform, and referring to fig. 8, the offshore platform 80 includes: a parallel frame 81 and one or more pontoon assemblies 20 as described above.

Wherein, the buoy assembly 20 is fixedly connected with the truss platform 81 and is used for providing buoyancy for the truss platform.

For example, the offshore platform 80 may be a wind turbine platform for wind power generation, which is fixedly connected to the bottom of the wind turbine.

Specifically, the fan platform is composed of two buoy assemblies 20 and a row frame platform 81 connected with the buoy assemblies 20, and the bottom of the fan is fixedly connected with the row frame platform 81.

The above-mentioned wind turbine platform provides buoyancy through buoy assembly 20 during the use, makes the fan erect on sea level to, buoy assembly 20 includes: n cylinders 21 with buoyancy and a frame structure 22 for fixing the N cylinders, wherein the N cylinders 21 are fixed in the frame structure 22. Therefore, the buoyancy barrel is fixed through the frame structure, and the weight of the buoy assembly can be obviously reduced. Meanwhile, compared with the buoy with a steel structure, the material and construction cost is reduced. And the corrosion resistance is also increased by the barrel body made of light materials with corrosion resistance.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (10)

1. A spar assembly for an offshore platform, comprising: the device comprises N cylinders with buoyancy and a frame structure for fixing the N cylinders, wherein the value of N is an integer greater than or equal to 1; the N cylinders are fixed in the frame structure;

the N barrels are provided with closed hollow cavities and are made of light materials with corrosion resistance.

2. The float assembly of claim 1,

the frame structure comprises M compartments, at least one of the N barrels is fixed in one of the M compartments, and the value of M is an integer which is greater than or equal to 1 and less than or equal to N.

3. The float assembly of claim 2,

the device comprises barrel bodies fixed in a compartment, wherein the barrel bodies are uniformly distributed in the compartment, and the top and the bottom of each barrel body are respectively attached to the compartment in the vertical direction of the sea level.

4. The float assembly of claim 3,

the separation chamber is internally provided with a central column which is used for fixing the cylinder body under the coaction with the separation chamber.

5. The float assembly of claim 4,

the cylinders in each compartment are uniformly distributed around the central column at equal angles.

6. The float assembly of claim 4,

the N cylinders are of an annular structure with a through hole in the center, and the size of the through hole is larger than or equal to that of the central column;

the cylinder in each compartment is sleeved on the central column through the through hole.

7. The float assembly of claim 2,

the buoy components are distributed in Y layers in the vertical direction of the sea level, and the value of Y is an integer which is greater than or equal to 1 and less than or equal to N;

the number of the cylinders on each layer is the same, and the cylinders are connected end to end in the vertical direction of the sea level.

8. The float assembly of claim 7,

an enclosure wall structure is arranged between the two cylinders which are connected end to end; the surrounding wall structure is coated on the connecting part of the two barrels and forms a sealed space with the outer surfaces of the two barrels.

9. The float assembly according to any of the claims 1-8,

the buoy assembly further comprises a ballast structure disposed at an end of the frame structure submerged at sea level; wherein the content of the first and second substances,

the ballast structure is for lowering the center of gravity of the buoy assembly.

10. An offshore platform, comprising:

a truss platform;

one or more buoy assemblies as claimed in claims 1-9;

the buoy component is fixedly connected with the truss platform and used for providing buoyancy for the truss platform.

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