A single pile foundation for offshore wind power

Abstract

The present invention relates to the field of marine engineering technology, and discloses an offshore wind power monopile foundation. It includes: a tower, an inner platform and a sealing rubber ring; the sealing rubber ring includes a top ring body and two annular support arms, the top side of the top ring body abuts against the bottom side of the platform plate, the top side of the support arm is connected to the top ring body, and the bottom side of the support arm abuts against the top side of the base plate, the two support arms are arranged at an angle, and the bottom side of the load-bearing ring plate is attached to the base plate; the two support arms in the sealing rubber ring are arranged at an angle. In the process of the inner platform being pressed onto the base plate, the angle increases so that the support arm abuts against the base plate, so that the sealing rubber ring has a larger deformation range, and can achieve complete sealing between the inner platform and the base plate when the platform manufacturing tolerance is large.

Description

Technical Field

[0001] The present invention relates to the technical field of marine engineering, and in particular to an offshore wind power monopile foundation. Background Art

[0002] With the development of offshore wind farms and technological development, the average unit capacity of offshore wind turbines has been increasing year by year, and the offshore distance and water depth have also been increasing. Based on the construction experience of domestic offshore wind farms, single piles, high pile caps and jacket wind turbine foundations are currently mainly used. Among them, single pile foundation is the most widely used foundation form. The single pile foundation uses a steel pipe pile with a diameter of 6-9 meters and a pile length of tens of meters. It is driven into the seabed by a large pile sinking machine. After the steel pipe pile of the single pile foundation is sunk, seawater and marine biological debris will remain inside, decomposing corrosive gases. These gases are mainly hydrogen sulfide gas, and also include methane, ammonia and other components. These gases are toxic, flammable and highly corrosive, posing a serious threat to the safe production management of wind farms.

[0003] At present, the main method for sealing the platform inside the tower of offshore wind power monopile foundation is to use two rubber sealing strips with sealing rings and bolts and other accessories to fix the seal. Figure 1 As shown, this method has high requirements on the manufacturing tolerance accuracy of the inner platform. In fact, the inner platform steel plate is often deformed and warped during the cooling process after cutting and during transportation. After installation, there will be a large gap between the inner platform and the base plate in a local position, and the compression deformation degree of the rubber sealing strip is small. Therefore, it cannot adapt to the inner platform with a large manufacturing tolerance, and may not achieve a complete sealing effect, resulting in frequent overflow of corrosive gas in the single pile tower. Summary of the invention

[0004] The purpose of the present invention is to provide an offshore wind power monopile foundation to solve the problem of frequent overflow of corrosive gas in the monopile tower due to the high requirements of the manufacturing tolerance accuracy of the inner platform in the existing sealing method and the fact that the compression deformation range of the sealing rubber in the existing airtight sealing method may be smaller than the manufacturing tolerance of the inner platform.

[0005] In order to achieve the above-mentioned purpose, the present invention provides an offshore wind power single pile foundation, which includes a tower, an inner platform and a sealing rubber ring. The top of the tower includes a base plate, a through opening is opened in the middle of the base plate, the inner platform is arranged on the base plate and covers the through opening, the inner platform includes a platform plate and a load-bearing ring plate arranged along the outer edge of the platform plate and extending downward, the load-bearing ring plate and the sealing rubber ring are both arranged around the through opening, and the sealing rubber ring is located on the inner side of the load-bearing ring plate, the sealing rubber ring includes a top ring body and two annular support arms, the top side of the top ring body abuts against the bottom side of the platform plate, the top side of the support arm is connected to the top ring body, and the bottom side of the support arm abuts against the top side of the base plate, the two support arms are arranged at an angle, and the bottom side of the load-bearing ring plate is attached to the base plate.

[0006] Furthermore, the angle formed by the two support arms ranges from 30° to 180°.

[0007] Furthermore, an annular fixing groove is provided on the bottom side of the platform plate, and the top ring body is arranged in the annular fixing groove.

[0008] Furthermore, two annular limiting plates arranged at intervals are provided on the bottom surface of the platform plate, and the annular fixing groove is defined between the two annular limiting plates.

[0009] Furthermore, anti-slip grooves are arranged on the inner circumferential wall of the annular fixing groove and / or the outer circumferential wall of the top ring body.

[0010] Furthermore, the anti-slip pattern is in a sawtooth or wavy shape.

[0011] Furthermore, a supporting rib connected to the tower is provided on the bottom side of the base plate, and a supporting reinforcing plate connected to the supporting rib is also provided on the bottom side of the base plate.

[0012] Furthermore, the number of the supporting ribs is 15 to 20, and they are distributed at intervals along the circumference of the base plate.

[0013] Furthermore, a limiting ring plate is provided on the bottom side of the platform plate, the limiting ring plate is inserted into the through opening, and an adjustment gap is left between the outer edge of the limiting ring plate and the inner peripheral wall of the through opening.

[0014] Furthermore, the deformation range of the sealing rubber ring in the vertical direction is 0 to 40 mm.

[0015] Compared with the prior art, the offshore wind power monopile foundation of the embodiment of the present invention has the following beneficial effects: the two support arms in the sealing rubber ring are arranged at an angle; when the inner platform is pressed onto the base plate, the angle increases so that the support arms abut against the base plate, so that the sealing rubber ring has a larger deformation range, and can achieve complete sealing between the inner platform and the base plate when the platform manufacturing tolerance is large. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the cross-section of the currently existing offshore wind power monopile foundation;

[0017] Figure 2 This is a cross-sectional view of an offshore wind power monopile foundation according to an embodiment of the present invention;

[0018] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0019] Figure 4 This is an installation structure diagram of an offshore wind power monopile foundation according to an embodiment of the present invention;

[0020] In the figure, 1, tower; 2, base plate; 3, support reinforcement plate; 4, support rib plate; 5, sealing rubber ring; 51, top ring body; 52, support arm; 6, annular fixing groove; 7, platform plate; 8, load-bearing ring plate; 9, limit ring plate. DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] like Figure 2 and Figure 4 As shown, an offshore wind power monopile foundation according to a preferred embodiment of the present invention comprises a tower 1, an inner platform and a sealing rubber ring 5, the top of the tower 1 comprises a base plate 2, a through opening is opened in the middle of the base plate 2, the inner platform is arranged on the base plate 2 and covers the through opening, the inner platform comprises a platform plate 7 and a load-bearing ring plate 8 arranged along the outer edge of the platform plate 7 and extending downward, the load-bearing ring plate 8 and the sealing rubber ring 5 are both arranged around the through opening, and the sealing rubber ring 5 is located on the inner side of the load-bearing ring plate 8, the sealing rubber ring 5 comprises a top ring body 51 and two annular support arms 52, the top side of the top ring body 51 abuts against the bottom side of the platform plate 7, the top side of the support arm 52 is connected to the top ring body 51, and the bottom side of the support arm 52 abuts against the top side of the base plate 2, the two support arms 52 are arranged at an angle, and the bottom side of the load-bearing ring plate 8 is attached to the base plate 2.

[0023] Based on this, in the offshore wind power monopile foundation of this embodiment, the two support arms 52 in the sealing rubber ring 5 are arranged at an angle. When the inner platform is pressed onto the base plate 2, the angle increases so that the support arm 52 abuts against the base plate 2, so that the sealing rubber ring 5 has a larger deformation range, and can achieve complete sealing between the inner platform and the base plate 2 when the platform manufacturing tolerance is large, thereby preventing the corrosive gas inside the tower from overflowing.

[0024] Furthermore, the angle formed by the two support arms 52 ranges from 30° to 180°, preferably 180°. When the angle is 180°, maximum sealing can be achieved. If the load-bearing ring plate 8 is higher, the angle is smaller; if the load-bearing ring plate 8 is lower, the angle is larger, and the sealing effect is better at this time.

[0025] Furthermore, if Figure 3 As shown, in order to facilitate the fixed connection of the top ring body 51 of the sealing rubber ring 5 to the bottom side of the platform plate 7 and enhance the stability of the connection, an annular fixing groove 6 is provided on the bottom side of the platform plate 7, and the top ring body 51 is arranged in the annular fixing groove 6; specifically, two annular limiting plates are provided at intervals on the bottom surface of the platform plate 7, and the annular fixing groove 6 is defined between the two annular limiting plates, and the annular fixing groove 6 is adapted to the top ring body 51; in order to increase the friction between the annular fixing groove 6 and the top ring body 51 to improve the connection strength between the two, anti-slip grooves are provided on the inner circumferential wall of the annular fixing groove 6 and / or the outer circumferential wall of the top ring body 51; specifically, the shape of the anti-slip grooves is serrated or wavy.

[0026] Furthermore, in order to improve the connection strength between the base plate 2 and the tower 1, a supporting rib 4 connected to the tower 1 is provided on the bottom side of the base plate 2, one side of the supporting rib 4 is connected to the tower 1, and the other adjacent side of the supporting rib 4 is connected to the base plate 2. A supporting reinforcing plate 3 connected to the supporting rib 4 is also provided on the bottom side of the base plate 2 for stabilizing the supporting rib 4; the number of the supporting ribs 4 is 15-20, and they are spaced apart along the circumference of the base plate 2.

[0027] Furthermore, in order to facilitate the positioning of the inner platform during installation and prevent the inner platform from undergoing large displacement, a limit ring plate 9 is provided on the bottom side of the platform plate 7. The limit ring plate 9 is inserted into the through opening, and an adjustment gap is left between the outer edge of the limit ring plate 9 and the inner circumferential wall of the through opening.

[0028] Furthermore, the deformation range of the sealing rubber ring 5 in the vertical direction is 0-40 mm, which is much larger than the tolerance of the inner platform produced during the manufacturing process, so effective sealing can be achieved.

[0029] The working process of the present invention is as follows: first, the angle between the support arms 52 in the sealing rubber ring 5 located below the inner platform is small. When the inner platform is installed on the substrate 2, as the distance between the inner platform and the substrate 2 decreases, the two support arms 52 open to each other, and the angle between the support arms 52 gradually increases. Finally, when the load-bearing ring plate 8 is crimped onto the substrate 2, the support arms 52 are attached to the substrate 2, thereby achieving complete sealing between the inner platform and the substrate 2.

[0030] In summary, an embodiment of the present invention provides an offshore wind power monopile foundation, in which the two support arms 52 in the sealing rubber ring 5 are arranged at an angle; when the inner platform is pressed onto the substrate 2, the angle increases so that the support arm 52 abuts against the substrate 2, so that the sealing rubber ring 5 has a larger deformation range, and can achieve complete sealing between the inner platform and the substrate 2 when the platform manufacturing tolerance is large, thereby preventing the corrosive gas in the tower from overflowing.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An offshore wind power monopile foundation, characterized in that: include: A tower, an inner platform and a sealing rubber ring, wherein the top of the tower comprises a base plate, a through opening is formed in the middle of the base plate, the inner platform is arranged on the base plate and covers the through opening, the inner platform comprises a platform plate and a load-bearing ring plate arranged along the outer edge of the platform plate and extending downward, the load-bearing ring plate and the sealing rubber ring are both arranged around the through opening, and the sealing rubber ring is located on the inner side of the load-bearing ring plate, the sealing rubber ring comprises a top ring body and two annular support arms, the top side of the top ring body abuts against the bottom side of the platform plate, the top side of the support arm is connected to the top ring body, and the bottom side of the support arm abuts against the top side of the base plate, the two support arms are arranged at an angle, and the bottom side of the load-bearing ring plate is attached to the base plate; An annular fixing groove is provided on the bottom side of the platform plate, and the top ring body is arranged in the annular fixing groove; The bottom surface of the platform plate is provided with two annular limiting plates arranged at intervals, and the annular fixing groove is defined between the two annular limiting plates; Anti-slip grooves are arranged on the inner peripheral wall of the annular fixing groove and / or the outer peripheral wall of the top ring body.

2. The offshore wind power monopile foundation according to claim 1, characterized in that: The angle formed by the two support arms ranges from 30° to 180°.

3. The offshore wind power monopile foundation according to claim 1, characterized in that: The anti-slip pattern is in a sawtooth or wave shape.

4. The offshore wind power monopile foundation according to claim 1 or 2, characterized in that: A supporting rib connected to the tower is disposed on the bottom side of the base plate, and a supporting reinforcing plate connected to the supporting rib is also disposed on the bottom side of the base plate.

5. The offshore wind power monopile foundation according to claim 4, characterized in that: The number of the supporting ribs is 15 to 20, and they are distributed at intervals along the circumference of the base plate.

6. The offshore wind power monopile foundation according to claim 1 or 2, characterized in that: A limiting ring plate is provided on the bottom side of the platform plate. The limiting ring plate is inserted into the through opening, and an adjustment gap is left between the outer edge of the limiting ring plate and the inner peripheral wall of the through opening.

7. The offshore wind power monopile foundation according to claim 1 or 2, characterized in that: The deformation range of the sealing rubber ring in the vertical direction is 0 to 40 mm.

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