CN218907562U

CN218907562U - Double-head offshore semi-submersible floating fan foundation

Info

Publication number: CN218907562U
Application number: CN202320017085.9U
Authority: CN
Inventors: 王永峰; 张鹏; 杨菁; 张凌伟; 刘常青; 周建军; 汪海燕; 朱伟亮; 张力强; 李霞
Original assignee: North China Power Engineering Co Ltd of China Power Engineering Consulting Group
Current assignee: North China Power Engineering Co Ltd of China Power Engineering Consulting Group
Priority date: 2023-01-04
Filing date: 2023-01-04
Publication date: 2023-04-25
Anticipated expiration: 2033-01-04

Abstract

The utility model relates to a double-head marine semi-submersible floating fan foundation, which comprises four pontoons arranged at four corners of a rectangle, wherein supports are connected between the pontoons, the supports comprise a horizontal support and an inclined support, two pontoons at one diagonal position are respectively provided with a fan, the bottom of each pontoon is also provided with a heave plate, the periphery of each heave plate is provided with an opening, and the inner bottom of each pontoon is also provided with ballast water. According to the utility model, two fans can be arranged on a single foundation, the material and construction cost are reduced, the two fans are symmetrically distributed, the problem of eccentricity is avoided, the structure is stable, and the hydrodynamic performance of the whole floating foundation is good.

Description

Double-head offshore semi-submersible floating fan foundation

Technical Field

The utility model belongs to the technical field of offshore floating fans, and particularly relates to a double-head offshore semi-submersible floating fan foundation.

Background

With the development of offshore wind power construction to deep sea, the offshore fixed fan foundation is limited in application due to the fact that the manufacturing cost is too high, and more floating fan foundation forms are generated. Currently, commonly used floating fan foundation types include: single column, tension leg, semi-submersible, barge, etc. The semi-submersible floating fan foundation has the characteristics of low relative technical difficulty, wide adaptability to water depth and the like, and is most widely applied.

Currently, there are two main forms of semi-submersible floating wind turbine foundations, the OC4 floating foundation type proposed by Windfloat and the international energy agency deep wind project. The upper tower of the Windfloat floating foundation is arranged on one of the three buoys, so that the whole foundation has eccentricity and the stress performance and hydrodynamic performance of the foundation are poor. The upper tower cylinder of the OC4 floating foundation is arranged on the upright posts at the centers of the three pontoons, so that the eccentricity of the foundation is avoided, but the foundation type has complex structure and high construction difficulty. The two common semi-submersible floating fan foundations are provided with a single fan, so that the cost is high, and the resource utilization rate is low. These factors have limited the development of offshore floating fans.

Disclosure of Invention

The utility model provides a double-head offshore semi-submersible type floating fan foundation, which avoids the problem of eccentric foundation and does not need to be provided with a complex center column by symmetrically arranging two fan tower cylinders at two ends of the floating type fan foundation.

The technical means adopted by the utility model are as follows:

a double-head marine semi-submersible floating fan foundation comprises four pontoons arranged at four corners of a rectangle, supports are connected between the pontoons, and a fan is arranged on each of the two pontoons at one diagonal.

Preferably, the support between the pontoons comprises a horizontal support, the horizontal support comprises a horizontal upper support, a horizontal lower support and a horizontal connection support, the horizontal upper support is connected and arranged between the upper ends of the pontoons at two adjacent corners of the four corners of the rectangle, the horizontal lower support is connected and arranged between the bottom ends of the pontoons at two adjacent corners of the four corners of the rectangle, the horizontal connection support is connected and arranged between the two pontoons at diagonal corners of the four corners of the rectangle, and the horizontal connection support is at least provided with two upper ends of the two pontoons at diagonal corners and bottom ends of the two pontoons respectively.

Preferably, the support between the pontoons further comprises diagonal bracing, wherein the diagonal bracing is arranged between two pontoons at two adjacent corners of the four corners of the rectangle, and the diagonal bracing is connected with the upper end of one pontoon and the bottom end of the other pontoon.

Preferably, the pontoon is divided into an upper end of a first diameter and a lower end of a second diameter, the second diameter being larger than the first diameter, and a mooring line is provided at the lower end of the pontoon in connection therewith.

Preferably, the bottom of the pontoon is provided with a heave plate, the heave plate having an area larger than the bottom end area of the pontoon, and an opening is provided on the periphery of the heave plate wider than the bottom end of the pontoon.

Preferably, the pontoon has ballast water at an inner bottom thereof.

Compared with the prior art, the utility model has the following beneficial technical effects:

according to the scheme, the two fans are arranged on the single foundation, compared with the two fans which are respectively arranged on the two floating foundations, the material quantity is reduced, the construction operation is reduced from two operations to one operation, and the material and construction cost are reduced. The two fans are symmetrically arranged on the floating foundation, the problem of eccentricity does not exist, the structure is simple, and the hydrodynamic performance of the whole floating foundation is good. The heave plate is arranged below the foundation pontoon, heave motion of the whole foundation is reduced, and holes in the heave plate increase damping of the structure, and the structures optimize hydrodynamic performance of the foundation.

Drawings

Fig. 1 is a schematic perspective view of the present dual head offshore semi-submersible floating wind turbine foundation.

Fig. 2 is a left side view of fig. 1.

Fig. 3 is a top view of fig. 1.

Wherein:

1 pontoon, 2 horizontal support, 21 horizontal upper support, 22 horizontal lower support, 23 horizontal connection support, 3 diagonal support, 4 mooring cable, 5 heave plate, 51 trompil, 6 fan, 61 fan tower section of thick bamboo, 62 fan blade.

Detailed Description

The utility model provides a double-head offshore semi-submersible type floating fan foundation, which is shown in figure 1 and comprises four pontoons 1 arranged at four corners of a rectangle, wherein supports are connected between the pontoons 1, and a fan 6 is arranged on each of the two pontoons 1 at one diagonal position. The two fans 6 are arranged on the diagonal angle of one foundation, compared with a single-fan type semi-submersible type fan foundation, on one hand, eccentric arrangement of the fans is avoided, on the other hand, a complex upright post structure during central arrangement of the fans is avoided, and meanwhile, the construction workload can be reduced.

In fig. 1 and 2, the support between the pontoons 1 includes a horizontal support 2, the horizontal support 2 includes a horizontal upper support 21, a horizontal lower support 22 and a horizontal connection support 23, the horizontal upper support 21 is connected between the upper ends of the pontoons 1 at two adjacent corners of the rectangular four corners, the horizontal lower support 22 is connected between the bottom ends of the pontoons 1 at two adjacent corners of the rectangular four corners, the horizontal connection support 23 is connected between the two pontoons 1 at diagonal corners of the rectangular four corners, at least two horizontal connection supports 23 are provided, and the upper ends of the two pontoons 1 at diagonal corners and the bottom ends of the two pontoons 1 are respectively connected, preferably, in order to prevent the horizontal connection support 23 from crossing, the horizontal connection support 23 is connected between the two pontoons 1 at one group of diagonal corners of the rectangular four corners, as shown in fig. 1. Wherein the four pontoons 1 are arranged in a rectangular shape on a plane, and the four pontoons are used for bearing the gravity of two fans 6 arranged on the foundation and the whole foundation to enable the pontoons to float on the sea surface

The function of the horizontal braces 2 is to connect different pontoons 1 to force the pontoons 1 together, and of course, in order to ensure the stability of the foundation, the number of horizontal braces 2 can be increased between the pontoons 1, and the arrangement of the horizontal braces 2 shown in fig. 1 is only a preferred embodiment.

And as shown in fig. 1 and 2, the support between the pontoons 1 further comprises diagonal braces 3, the diagonal braces 3 are connected between the pontoons 1 at two adjacent corners of the rectangular four corners, and the diagonal braces 3 are connected with one of the pontoons

The upper end of the pontoon 1 is connected with the bottom end of another pontoon 1, and preferably, two inclined struts 3 are respectively arranged on any pontoon 1 in a connecting way, and are respectively connected with pontoons 1 on two sides of the pontoon 1, wherein the two inclined struts 3 are respectively arranged on any pontoon 1 in a connecting way, or are respectively arranged on the upper end of the pontoon 1 in a connecting way, or are respectively arranged on the bottom end of the pontoon 1 in a connecting way. The function of the diagonal brace 3 is to ensure that the entire foundation forms a stable whole.

And as shown in fig. 2, the pontoon 1 is divided into an upper end of a first diameter and a lower end of a second diameter,

the second diameter is larger than the first diameter, wherein the type of the pontoon 1 with the bigger lower part and the bigger upper part is also convenient for keeping the stability of 5 of the pontoon 1, and mooring ropes are also connected and arranged on the bottom end of the pontoon 1, and the whole foundation passes through the mooring ropes 4

Fixed at a designated position.

As shown in fig. 1 and 3, the bottom of the pontoon 1 is provided with a heave plate 5, the heave plate 5 has a larger area than the bottom end of the pontoon 1, and the heave plate 5 is provided on the periphery of the bottom end of the pontoon 1

There are openings 51, preferably uniform openings 51 at the periphery of heave plate 5, to increase the damping of the overall structure. 0 and the inner bottom of the pontoon 1 is provided with ballast water, and the ballast water can be dynamically regulated according to wind speed and wind direction, so that the stability of the whole foundation is ensured, and the whole foundation is ensured to have good hydrodynamic performance.

The above only shows the preferred embodiments, wherein the shape of the pontoons, the number of the arrangement modes of the supports among the pontoons, the materials of the parts and the like can be adjusted according to the actual engineering requirements, and the utility model also belongs to the protection scope of the utility model.

Claims

1. The marine semi-submersible floating fan foundation with the double heads is characterized by comprising four pontoons (1) arranged at four corners of a rectangle, wherein supports are connected between the pontoons (1), and a fan (6) is arranged on each of the two pontoons (1) at one diagonal corner.

2. The double-head offshore semi-submersible type floating fan foundation according to claim 1, characterized in that the support between the pontoons (1) comprises a horizontal support (2), the horizontal support (2) comprises a horizontal upper support (21), a horizontal lower support (22) and a horizontal connecting support (23), the horizontal upper support (21) is connected and arranged between the upper ends of the pontoons (1) at two adjacent corners of the rectangular four corners, the horizontal lower support (22) is connected and arranged between the bottom ends of the pontoons (1) at two adjacent corners of the rectangular four corners, the horizontal connecting support (23) is connected and arranged between the two pontoons (1) at diagonal corners of the rectangular four corners, and the horizontal connecting support (23) is at least provided with two connecting upper ends of the two pontoons (1) at diagonal corners and bottom ends of the two pontoons (1) respectively.

3. A twin-head offshore semi-submersible wind turbine foundation according to claim 2, characterised in that the support between the pontoons (1) further comprises diagonal braces (3), the diagonal braces (3) being arranged in connection between two pontoons (1) at adjacent corners of the rectangular corners, the diagonal braces (3) connecting the upper end of one pontoon (1) with the bottom end of the other pontoon (1).

4. A double-head offshore semi-submersible wind turbine foundation according to claim 3, characterised in that the pontoon (1) is divided into an upper end of a first diameter and a lower end of a second diameter, the second diameter being larger than the first diameter, and that mooring lines (4) are further provided at the lower end of the pontoon (1).

5. A double-head offshore semi-submersible wind turbine foundation according to claim 1, characterised in that the bottom of the pontoon (1) is provided with a heave plate (5), the heave plate (5) has a larger area than the bottom end of the pontoon (1), and that the heave plate (5) is provided with openings (51) on its periphery wider than the bottom end of the pontoon (1).

6. A double-head offshore semi-submersible wind turbine foundation according to claim 1, characterized in that the pontoon (1) has ballast water at the inner bottom.