Offshore wind power sharing anchor point device based on pile foundation

Abstract

The utility model discloses an offshore wind power sharing anchor point device based on a pile foundation, which comprises a floating fan, an anchoring system, a single pile foundation and a swivel mechanism sleeved on the pile foundation, the swivel mechanism comprises a lower annular bottom plate, an upper annular cover plate, a swivel outer ring, a swivel inner ring, a rolling body and an isolation body, the upper annular cover plate, the conversion inner ring and the lower annular bottom plate are sequentially arranged on the pile foundation in a sleeving manner and are fixedly connected; the swivel outer ring is located between the upper annular bottom plate and the lower annular bottom plate, the swivel outer ring and the swivel inner ring are coaxially arranged, the isolation body and the rolling body are distributed between the swivel outer ring and the swivel inner ring, and the isolation body is fixedly connected with the swivel inner ring. According to the floating type fan foundation anchoring system, the existing pile foundation of an offshore structure is used as a carrier of the floating type fan foundation anchoring system, a plurality of floating type fan foundations can be anchored, matching arrangement of floating type fans and fixed type fans is achieved, the comprehensive utilization rate of the structure is effectively improved, and the reliability of the anchoring system is improved. And the construction cost of the floating type fan foundation is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of offshore floating wind turbine foundation anchoring, and relates to an offshore wind power shared anchor point device based on a pile foundation. Background Art

[0002] Offshore wind power is a new field of renewable energy development and an important direction for wind power development. In recent years, offshore wind power is gradually developing in the direction of deep sea. Compared with offshore wind power, deep sea wind power has broad application prospects due to its larger wind resource reserves and longer power generation time. However, as the water depth exceeds 50m, the cost of traditional fixed offshore wind turbine foundations rises sharply. In order to seek new technological breakthroughs, the concept of offshore floating wind turbine foundations came into being. Floating wind turbine foundations can adapt to different water depths, multiple wind directions and ocean current environments, and are the preferred foundation form for deep sea wind farms.

[0003] The reliability of the floating wind turbine mooring system is related to the safety of wind turbine operation. Common forms include gravity anchors, drilled grouting anchors, drag embedded anchors and normal load-bearing anchors. However, the above traditional anchoring systems involve seabed construction. Affected by harsh ocean loads and seabed geological conditions, the quality and reliability of anchoring are difficult to guarantee. In addition, the cost of the anchoring system is also relatively high. Therefore, how to ensure the reliability of the mooring system while controlling its cost is one of the primary challenges faced by engineers.

[0004] As a major country in marine engineering construction, my country has built a large number of fixed structures at sea, such as offshore wind turbines, offshore booster stations and offshore platforms. How to use existing or under-construction offshore fixed structures as the carrier of the mooring system is undoubtedly a powerful way to improve the anchoring quality and reduce engineering costs. Utility Model Content

[0005] The purpose of the utility model is to provide an offshore wind power shared anchor point device based on a pile foundation, so as to solve the problem of improving the anchoring reliability of the offshore floating wind turbine foundation and reducing its cost in the above-mentioned background technology.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A shared anchor point device for offshore wind power based on pile foundation, comprising a swivel mechanism mounted on the outer wall of the pile foundation, the swivel mechanism comprising a lower annular base plate, an upper annular cover plate, a swivel outer ring, a conversion inner ring, rolling bodies and isolating bodies, the upper annular cover plate, the conversion inner ring and the lower annular base plate are all mounted on the pile foundation, the upper annular cover plate and the lower annular base plate are fixedly connected to the two ends of the swivel inner ring respectively; the swivel outer ring is located between the upper annular cover plate and the lower annular base plate, and the swivel outer ring is coaxially arranged with the swivel inner ring, a plurality of isolating bodies and rolling bodies are evenly distributed between the swivel outer ring and the swivel inner ring, the isolating body is fixedly connected to the outer surface of the swivel inner ring, and is used to separate the rolling bodies and limit the movement of the rolling bodies; the swivel outer ring realizes rotation around the axis by the rolling bodies rolling in the limiting area formed by the isolating body.

[0008] Furthermore, flanges are provided at the edges of the upper annular cover plate and the lower annular bottom plate to limit the axial movement of the outer edge of the rotating ring.

[0009] Furthermore, a plurality of lifting ears are provided on the outer surface of the outer ring of the rotating ring for fixing the floating wind turbine.

[0010] Furthermore, the lifting lug is connected to the floating wind turbine via an anchor chain.

[0011] Furthermore, the rolling body is cylindrical.

[0012] A method for arranging an offshore wind power shared anchor point device based on a pile foundation is implemented using the offshore wind power shared anchor point device based on a pile foundation, comprising the following steps:

[0013] The floating wind turbine is fixed by a composite anchoring method, that is, the anchor chain adjacent to the floating wind turbine and the single pile foundation is fixed to the pile foundation through a swivel mechanism, and the remaining anchor chains are connected to the seabed by the anchor foundation; and the single pile foundation is connected to the anchor chains of multiple floating wind turbines, so that multiple floating wind turbines share the anchor point.

[0014] The beneficial effects of the utility model are:

[0015] 1. Use the existing pile foundation of the offshore structure as the carrier of the floating wind turbine foundation anchoring system to improve the comprehensive utilization rate of the structure, increase the reliability of the anchoring system, and reduce the construction cost of the floating wind turbine foundation.

[0016] 2. The anchoring device can rotate with the axis of the pile body, so that the lifting lug and anchor chain are in a better stress state, thereby improving the anchoring reliability.

[0017] 3. The anchoring device may be provided with a plurality of lifting ears, and may anchor a plurality of floating wind turbine foundations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A side structural diagram of an anchoring device according to an embodiment of the utility model;

[0019] Figure 2 This is a top view of the structure of the anchoring device according to an embodiment of the utility model;

[0020] Figure 3 This is a cross-sectional structural diagram of the anchoring device of an embodiment of the utility model;

[0021] Figure 4 This is a cross-sectional structural diagram of the anchoring device BB of an embodiment of the utility model;

[0022] Figure 5 An exploded view of an anchoring device according to an embodiment of the utility model;

[0023] Figure 6 It is a top view schematic diagram of the foundation of four floating wind turbines anchored in the embodiment of the utility model;

[0024] Figure 7 It is a side view schematic diagram of the anchored floating wind turbine foundation in an embodiment of the utility model.

[0025] In the figure: 1. swivel mechanism; 101. lower annular bottom plate; 102. swivel outer ring; 103. upper annular cover plate; 104. lifting lug; 105. rolling element; 106. isolating element; 107. swivel inner ring; 2. anchor chain; 3. pile foundation; 4. floating wind turbine. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments and drawings.

[0027] like Figure 1-7As shown, an offshore wind power shared anchor point device based on a pile foundation and a layout method thereof, comprising a swivel mechanism 1 mounted on the pile foundation, the swivel mechanism 1 comprising a lower annular bottom plate 101, an upper annular cover plate 103, a swivel outer ring 102, a conversion inner ring 107, a rolling body 105 and an isolating body 106, the upper annular cover plate 103, the conversion inner ring 107 and the lower annular bottom plate 101 are all mounted on the pile foundation, the upper annular cover plate 103 and the lower annular bottom plate 101 are respectively connected to the swivel inner ring 107, and the rolling body 105 and the isolating body 106 ... The two ends of the swivel ring 107 are fixedly connected; the outer ring 102 of the swivel is located between the upper annular cover plate 103 and the lower annular bottom plate 101, and the outer ring 102 of the swivel is coaxially arranged with the inner ring 107 of the swivel, and a plurality of isolating bodies 106 and rolling bodies 105 are evenly distributed between the outer ring 102 of the swivel and the inner ring 107 of the swivel, and the isolating bodies 106 are fixedly connected with the outer surface of the inner ring 107 of the swivel, and are used to separate the rolling bodies 105 and limit the movement of the rolling bodies 105. The rolling bodies 105 are preferably stainless steel cylinders, and their axial directions are parallel to the axial directions of the inner ring 107 of the swivel and the outer ring 102 of the swivel, and when the outer ring 102 of the swivel rotates around the center, the rolling bodies 105 rotate synchronously in the limiting area.

[0028] The upper annular cover plate 103 and the lower annular bottom plate 101 are provided with flanges at their edges, which are used to limit the axial movement of the swivel outer ring 102, so that the swivel outer ring 102 is positioned in the axial direction and can only rotate around the axis. The outer surface of the swivel outer ring 102 is provided with a plurality of lifting ears 104, which are used to fix the floating wind turbine. The lifting ears 104 are connected to the floating wind turbine 4 through the anchor chain 2. The lifting ears 104 and the anchor chain 2 can rotate with the swivel outer ring 102, so that the force of the anchoring component is more reasonable.

[0029] The lifting lugs 104 on the outer ring 102 of the swivel can be connected to multiple floating wind turbines 4 through anchor chains 2 to achieve anchoring of multiple floating wind turbines 4. The floating wind turbine can adopt a composite anchoring form, that is, one anchor chain of the floating wind turbine is fixed on the pile foundation through the swivel mechanism 1, and the remaining anchor chains adopt a traditional anchoring form.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the ideas and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An offshore wind power shared anchor point device based on pile foundation, characterized in that: The invention comprises a swivel mechanism (1) which is sleeved on the outer wall of a pile foundation, the swivel mechanism (1) comprising a lower annular bottom plate (101), an upper annular cover plate (103), a swivel outer ring (102), a conversion inner ring (107), a rolling body (105) and an isolating body (106), the upper annular cover plate (103), the conversion inner ring (107) and the lower annular bottom plate (101) are all sleeved on the pile foundation, the upper annular cover plate (103) and the lower annular bottom plate (101) are both fixed to the pile foundation and are respectively connected to the upper and lower ends of the swivel inner ring (107). The ends of the swivel ring (102) are fixedly connected; the swivel outer ring (102) is located between the upper annular cover plate (103) and the lower annular bottom plate (101), and the swivel outer ring (102) is coaxially arranged with the swivel inner ring (107); a plurality of isolating bodies (106) and rolling bodies (105) are evenly distributed between the swivel outer ring (102) and the swivel inner ring (107); the isolating bodies (106) are fixedly connected to the outer surface of the swivel inner ring (107) and are used to separate the rolling bodies (105) and limit the movement of the rolling bodies (105).

2. The offshore wind power shared anchor point device based on pile foundation according to claim 1, characterized in that: The upper annular cover plate (103) and the lower annular bottom plate (101) are both provided with flanges at their edges, which are used to limit the radial outward movement of the rotating ring outer ring (102).

3. The offshore wind power shared anchor point device based on pile foundation according to claim 1, characterized in that: The outer surface of the rotating ring outer ring (102) is provided with a plurality of lifting ears (104) for fixing a plurality of floating wind turbines.

4. The offshore wind power shared anchor point device based on pile foundation according to claim 3 is characterized in that: The lifting lug (104) is connected to a plurality of floating wind turbines via an anchor chain (2).

5. The offshore wind power shared anchor point device based on pile foundation according to claim 1, characterized in that: The rolling body (105) is cylindrical.

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