CN114954820A - Annular-connected four-column type offshore floating type fan platform - Google Patents

Abstract

The invention discloses an annularly connected four-column offshore floating fan platform, comprising a platform base, a side column, a central column and a mooring system. The platform base is composed of a bottom plate, a top plate, a fan-shaped frame and a connecting pipe. There are a number of fan-shaped through holes corresponding to each other, and round holes are evenly distributed around the fan-shaped through holes. Connected by connecting pipes; the outer rings of the bottom plate and the top plate are closed and connected by a circular connecting plate to form a platform base with a cavity structure. The side wall of the platform base is provided with three arc-shaped openings. There is a circular opening connected with the central column, the side column and the central column are both hollow cylindrical cavity structures, the bottom of the central column is communicated with the circular opening, and the side column is communicated with the arc-shaped opening.

Description

A ring-connected four-column offshore floating wind turbine platform

technical field

The invention belongs to the technical field of offshore wind turbine basic structures, and in particular relates to a ring-connected four-column offshore floating wind turbine platform design.

Background technique

Wind power resource is a kind of renewable and clean energy, and it is an important energy branch to achieve the goal of "dual carbon" in the future. It has irreplaceable advantages such as traditional fossil fuels. At present, onshore wind power technology has become mature, and my country urgently needs to expand the development space of offshore wind power, expand the existing wind power layout, improve my country's energy structure, and meet my country's gradually increasing energy demand.

Due to the limited offshore wind energy resources and the greater and more stable wind speed in the far-reaching sea, its power generation is proportional to the third power of the wind speed and has a larger power generation, so offshore floating wind power has a broader development potential. The main forms of offshore floating wind turbine platforms are semi-submersible, single-column, tension leg and barge. Among them, semi-submersible has a wide range of adaptation to water depth and is suitable for overall installation and integrated towing on land. According to the current research and practice in various countries, the semi-submersible wind turbine platform is more stable in the form of three columns, so a more reliable semi-submersible structure is proposed based on this.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a ring-connected four-column offshore floating fan platform in order to overcome the deficiencies in the prior art, so as to improve the reliability of the foundation of the floating fan and the broadness of application. The floating fan platform has a lower center of gravity design, and has a lighter mass than platforms of the same magnitude, and the overall ability to resist heave motion is stronger. The above advantages can improve the working stability of the floating fan platform.

The purpose of this invention is to realize through the following technical solutions:

An annularly connected four-column offshore floating fan platform, comprising a platform base, a side column, a central column and a mooring system, the platform base is composed of a bottom plate, a top plate, a fan-shaped frame and a connecting pipe, the bottom plate and the top plate There are a number of fan-shaped through holes corresponding to the upper plate, and round holes are evenly distributed around the fan-shaped through holes. The corresponding fan-shaped through holes on the bottom plate and the top plate are connected by a fan-shaped frame body. The holes are connected by connecting pipes; the outer rings of the bottom plate and the top plate are closed and connected by a circular connecting plate to form a platform base with a cavity structure, and the side walls of the platform base are equidistantly opened with three arc-shaped openings, The arc-shaped opening is connected to the side column, the middle of the top plate is provided with a circular opening connected to the middle column, the side column and the middle column are both hollow cylindrical cavity structures, and the bottom of the middle column is It is communicated with the circular opening, and the side column is communicated with the arc-shaped opening, so that the cavity structure of the platform base is communicated with the side column and the center column; the bottom of the side column is provided with an inlet. water outlet;

The mooring system includes a mooring line and a mooring anchor, a connecting piece is arranged on the side column, one end of the mooring line is connected with the connecting piece through a hinged manner, and the other end is connected with the mooring anchor on the seabed.

Further, arc-shaped chamfers are provided at the included corners of the fan-shaped frame body and the fan-shaped through holes.

Further, the platform base, the side column and the center column are all made of steel material, and the platform base, the side column and the center column are connected by welding.

Further, the through holes of each connecting pipe on the platform base constitute the choke holes of the platform base, and they are all arranged at equal intervals.

Further, the included angle between the central axis of the central column and the connecting line of the central axis of each side column is 120°.

Compared with the prior art, the beneficial effects brought by the technical solution of the present invention are:

1. In the present invention, a plurality of box-shaped compartments with rectangular cross-sections are formed inside the platform base, and the compartments are connected with each other and store most of the ballast water, which can effectively reduce the center of gravity of the entire floating fan platform. In addition, the specific structural setting of the platform base ensures a large surface area, which can well reduce the heave, pitch and roll motions of the platform.

2. The side column is used to provide buoyancy, increase stability, disperse the impact of the incoming flow, and reduce the impact on the neutral column. The top of the neutral column is connected to the wind turbine tower to support offshore power generation.

3. The corners of the fan-shaped frame and the fan-shaped through holes are provided with arc-shaped chamfers to prevent the stress concentration that occurs when the platform base is subjected to transverse and longitudinal bending moments.

4. The through holes of each connecting pipe on the platform base constitute the damping holes of the platform base, and they are arranged at equal intervals. According to the calculation, the above-mentioned sway holes can improve the hydrodynamic characteristics while satisfying the strength, and effectively reduce the motion response amplitude of the six degrees of freedom; meet the corresponding motion response.

5. The overall center of gravity of the offshore floating fan platform of the present invention is low, and the stability is good, and there is no need to worry about the danger of overturning during towing; because the platform base bears most of the ballast, it also reduces the entire floating fan. The center of gravity of the platform improves the reliability of the operation.

6. The platform base of the present invention also directly assumes the role of the heave plate, and the overall area is large, which greatly reduces the heave effect of the floating fan platform. damage.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Figure 2 is a top view of a floating fan platform;

Figure 3 is a bottom view of the platform base;

Figure 4 is a side view of the floating fan platform.

Reference numerals: 1-platform base, 2-center column, 3-side column, 4-mooring line, 5-mooring anchor, 6-connecting pipe, 7-sector frame, 8-seabed.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

As shown in Figures 1 to 4, a ring-connected four-column offshore floating wind turbine platform includes a platform base 1, a side column 3, a central column 2 and a mooring system. The platform base 1 is mainly responsible for platform ballast and connection The function of the column is composed of a bottom plate, a top plate, a fan-shaped frame body 7, and a connecting pipe 6. There are three fan-shaped through holes corresponding to the bottom plate and the top plate respectively, and the specific number of fan-shaped through holes can be set according to needs. 3-6. There are circular holes evenly distributed around the fan-shaped through holes, the corresponding fan-shaped through holes on the bottom plate and the top plate are connected by the fan-shaped frame body 7, and the corresponding circular holes on the bottom plate and the top plate are connected by connecting pipes 6; The outer ring is closed and connected by a circular connecting plate to form a platform base 1 with a cavity structure. The side wall of the platform base 1 is provided with three arc-shaped openings at equal intervals, and the arc-shaped openings are connected with the side columns 3. The circular opening connected to the central column 2, the side column and the central column are both hollow cylindrical cavity structures, the bottom of the central column is communicated with the circular opening, and the side column 3 is communicated with the arc-shaped opening to realize the empty space of the platform base. The cavity structure is interconnected with the side uprights and the middle uprights; the bottom of the side uprights is provided with a water inlet in the middle for increasing and decompressing the water-carrying water, and the seawater can be controllably pumped out through the electric device to keep the floating fan platform stable.

The mooring system includes a mooring line 4 and a mooring anchor 5. A connecting piece is provided on the side column 3. One end of the mooring line 4 is connected to the connecting piece by means of articulation, and the other end is connected to the mooring anchor 5 located on the seabed 8.

Specifically, in this embodiment, the entire floating fan platform is made of steel material, and in some cases, it can also be made of reinforced concrete material. The center column 2, the side column 3 and the platform base 4 are connected as a whole by welding, and the internal hollow structure bears ballast water and communicates with the platform base 4; the diameter of the side column 3 can be adjusted according to actual needs, mainly used to provide buoyancy, increase Stability, can disperse the impact of the incoming flow and reduce the impact on the neutral column 2. The top of the neutral column 2 is connected to the wind turbine tower to support offshore power generation. In this embodiment, the included angle between the central axis of the central column 2 and the line connecting the central axes of the three side columns 3 is 120°.

In this embodiment, due to the arrangement of the fan-shaped frame and the connecting pipe, the platform base 1 is formed with a plurality of box-shaped compartments with rectangular cross-sections. The center of gravity of the fan platform. The above-mentioned structural arrangement of the platform base 1 ensures a large surface area, and reduces the heave, pitch and roll motions of the platform well.

Specifically, arc-shaped chamfers are provided at the included corners of the fan-shaped frame body 7 and the fan-shaped through holes, which are used to prevent the stress concentration that occurs when the platform base 1 is subjected to transverse and longitudinal bending moments.

The through holes of each connecting pipe on the platform base constitute the choke holes of the platform base, and they are all arranged at equal intervals. According to the calculation, the above-mentioned sway holes can improve the hydrodynamic characteristics while satisfying the strength, and effectively reduce the motion response amplitude of the six degrees of freedom; meet the corresponding motion response.

The mooring system is composed of a mooring line 4 and a mooring anchor 5. The mooring line 4 is a steel chain structure, its own weight can provide a small part of the vertical force, and the upper edge of the platform base 4 is connected by a hinge. Parts are distributed symmetrically; different mooring anchors 5 are selected for anchoring according to the soil conditions of the seabed, mainly to resist the motion of the floating fan platform in surge, pitch, roll and bow, so that it is relatively stationary in the working area.

The floating fan platform of the invention can be integrally formed in the dock and towed by the ship as a whole, the draught before and after ballast is suitable for most docks, and the adaptability to the water depth of the working waters is extremely strong.

The overall center of gravity of the present invention is low, the stability is good, and there is no need to worry about the danger of overturning during towing; since the platform base 1 bears most of the ballast, the center of gravity of the entire floating fan platform is well reduced, and the reliability of work.

The platform base 1 of the present invention also directly assumes the role of the heave plate, and has a large overall area, which greatly reduces the heave effect of the floating wind turbine platform 1, and at the same time, the excellent bending moment resistance can also resist extreme sea conditions. damage.

The present invention is not limited to the embodiments described above. The above description of the specific embodiments is intended to describe and illustrate the technical solutions of the present invention, and the above-mentioned specific embodiments are only illustrative and not restrictive. Without departing from the spirit of the present invention and the protection scope of the claims, those of ordinary skill in the art can also make many specific transformations under the inspiration of the present invention, which all fall within the protection scope of the present invention.

Claims (5)

1. a four-column type offshore floating fan platform of annular connection, is characterized in that, comprises platform base, side column, neutral column and mooring system, and described platform base is made up of bottom plate, top plate, sector frame, connecting pipe There are several fan-shaped through holes corresponding to the bottom plate and the top plate respectively, circular holes are evenly distributed around the fan-shaped through holes, and the corresponding fan-shaped through holes on the bottom plate and the top plate are connected by a fan-shaped frame body. The corresponding circular holes on the top plate are connected by connecting pipes; the outer rings of the bottom plate and the top plate are closed and connected by a circular connecting plate to form a platform base with a cavity structure, and the side walls of the platform base are opened at equal intervals There are three arc-shaped openings, the arc-shaped openings are connected with the side uprights, the middle of the top plate is provided with a circular opening connected with the central uprights, the side uprights and the central uprights are both hollow cylindrical cavity structures, The bottom of the central column is communicated with the circular opening, and the side column is communicated with the arc-shaped opening, so that the cavity structure of the platform base is communicated with the side column and the central column; the side column is communicated with each other; The bottom of the column is provided with a water inlet; The mooring system includes a mooring line and a mooring anchor, a connecting piece is arranged on the side column, one end of the mooring line is connected with the connecting piece through a hinged manner, and the other end is connected with the mooring anchor on the seabed. 2 . The annularly connected four-column offshore floating fan platform according to claim 1 , wherein the angle between the fan-shaped frame body and the fan-shaped through hole is provided with a circular arc-shaped chamfer. 3 . 3. A kind of annularly connected four-column offshore floating wind turbine platform according to claim 1, is characterized in that, described platform base, side column and middle column are all made of steel material, platform base, side column and The central columns are connected by welding. 4. A four-column offshore floating fan platform with annular connection according to claim 1 is characterized in that, the through holes of each connecting pipe on the platform base constitute the choke holes of the platform base, and they are all equally spaced arrangement. 5 . The four-column offshore floating wind turbine platform of claim 1 , wherein the angle between the central axis of the central column and the connecting line of the central axis of each side column is 120° .

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