CN105604804A - Floating pile type platform suitable for wind turbine generator and mounting method of floating pile type platform - Google Patents

Abstract

The invention discloses a floating pile type platform suitable for a wind turbine generator and a mounting method of the floating pile type platform. The floating pile type platform comprises anchors arranged on the seabed, anchor chains connected with the anchors, a tower cylinder, a cabin mounted at the top of the tower cylinder and a wind wheel connected with the cabin. A hollow floating box is detachably connected to the bottom of the tower cylinder. A hollow floating pile is detachably connected to the bottom of the floating box. The floating pile is prefabricated by reinforced concrete. The other ends of the anchor chains are connected with the top of the floating pile. The floating pile type platform has the advantages that the floating pile type platform is unlimited by territory dimension, the barrier of deep-sea assembling is solved in a ground-breaking manner, the deep-sea work in-situ assembling of a floating type wind turbine generator system is achieved, and the floating pile type platform is good in stability, low in manufacturing cost, and the like.

Description

A floating pile platform suitable for wind power generating sets and its installation method

technical field

The invention belongs to offshore wind power generation equipment, and in particular relates to a floating pile platform suitable for a wind power generating set and an installation method thereof.

Background technique

In today's world, fossil energy sources such as coal and oil with limited reserves, uneven distribution and non-renewable resources are increasingly difficult to meet the needs of rapid economic and social development. Wind energy, as a widely distributed and inexhaustible energy source, has attracted more and more attention from all countries, and is currently one of the most valuable new energy sources for large-scale commercial development. Wind power technology is the most important means of utilizing wind energy resources. The offshore wind resource has the advantages of not occupying land, high wind speed and stable dominant direction, high energy yield, and low impact on the environment. The application prospect of offshore wind power is broad.

Due to technical limitations, most of the established offshore wind farms are located in shallow sea areas, using fixed foundations, such as my country's East China Sea wind farm and Rudong wind farm. However, the establishment of wind farms in shallow seas has its disadvantages that cannot be ignored. For example, ship channels and fishery development are commonly used in shallow sea areas. The area used for wind farm construction is limited, and there are many people living or working in shallow sea areas, which are affected by the noise generated by wind turbines. big influence. Therefore, wind power builders are gradually turning their attention to deeper waters.

At present, countries such as Norway, the United Kingdom, and Japan, which are rich in marine wind resources, have carried out research on wind farm projects in relatively deep waters. With the development from shallow seas to deep seas, the basic style of wind turbines and system installation methods have become the primary technical problems to be solved. The fixed foundation with mature technology is no longer suitable for deep sea areas, and has been replaced by floating platforms. The influential deep-sea wind farms such as Hywind in Norway, Windfloat in Portugal and Fukushima Mirai in Japan all use floating platforms.

Looking at the deep sea wind power projects that have been carried out in various countries, the installation method is to first install the wind turbines, pole towers, and floating platforms in shallow sea docks, and then drag them to deep sea areas as a whole. This method of first installing in the dock and then transporting it to the deep sea for positioning and operation results in that the floating foundation can only be a large floating body structure with a shallow draft (about 30m), which has poor stability and high manufacturing and installation costs.

Therefore, it is necessary to propose new floating foundations and corresponding new installation and construction methods to reduce the cost of floating offshore wind farms while ensuring their stability.

Contents of the invention

In view of the above problems, the present invention aims to provide a floating pile platform with good stability and low manufacturing cost and its installation method.

The technical solution of the present invention to solve the problem is: a floating pile platform suitable for wind power generating sets, including an anchor body located on the seabed, an anchor chain connected to the anchor body, a tower, a cabin installed on the top of the tower, and The wind wheel connected to the nacelle, the bottom of the tower is detachably connected with a hollow buoyant tank, and the bottom of the buoyant tank is detachably connected with a hollow floating pile, and the floating pile is prefabricated from reinforced concrete; Pile top connection.

Preferably, the lower part of the floating pile is provided with irrigation holes.

Preferably, a steel plate is pre-embedded at the top of the floating pile, and the buoyant tank and the floating pile are fixedly connected by a flange.

For better positioning during installation, conical grooves are provided at the bottom of the tower and the bottom of the floating tank, and conical protrusions are provided at the top of the floating tank and the top of the floating pile;

The floating pile and the buoyant tank are positioned through the cooperation of the conical protrusion and the conical groove, and the buoyant tank and the tower are positioned through the cooperation of the conical protrusion and the conical groove.

In the above structure, the floating box is used to support the fan assembly, and the floating pile is used to further stabilize the structure above the floating pile.

Preferably, the above-mentioned tower tube and buoyancy tank are steel structures.

Correspondingly, the present invention also provides an installation method suitable for the above-mentioned floating pile platform, which is characterized in that it includes the following steps:

(a) Prefabricate the pontoon, floating pile, tower, engine room, and wind wheel on the shore or in the shoal area, and transport them to the place where the wind turbine is to be installed;

(b) Fill the counterweight into the floating pile so that the floating pile is in an upright state;

(c) Connect the top of the floating pile to the anchor body with an anchor chain;

(d) Rigidly connecting the working boat to the upper part of the floating pile; the working boat includes a lifting device, especially the working boat is also equipped with a mechanical arm capable of hugging the floating pile;

Use the mechanical arm on the working boat to hold the floating pile, so that the working boat and the floating pile are relatively stationary;

(e) Lift the floating box and assemble it with the floating pile, then loosen the mechanical arm holding the floating pile, so that the working boat and the floating pile are relatively separated. At this time, the floating pile and the floating box are integrated, and the floating pile sinks completely submerged in water; the pontoon is partly above sea level and partly below sea level;

(f) Hold the floating pile with the mechanical arm on the working boat, and rigidly connect the working boat to the upper part of the floating pile, so that the working boat and the floating pile are relatively stationary;

(g) Lifting the integral parts assembled by the tower, nacelle and wind wheel, and connecting the bottom of the tower with the top of the pontoon;

(h) Completely loosen the connection between the working boat and the floating pile, lower the anchor and adjust the line of the anchor chain to reach the final design position.

The anchor chain is catenary or tensioned. Under the working condition, the underwater part and the above water part of the buoyant tank each account for half.

Preferably, the method of transporting the floating piles in step (a) adopts the method of directly placing the floating piles on the sea surface and floating them flat.

Further, the lower part of the floating pile is provided with an irrigation hole, and the method of filling the floating pile with counterweights in step (b) is to fill the hollow cavity of the floating pile directly from the irrigation hole, and then block the irrigation hole after reaching the designed water amount. live.

Furthermore, a steel plate is pre-embedded on the top of the floating pile, and a flange is provided between the floating box and the floating pile;

In step (e), the flange is hoisted to the top of the floating pile by the workboat, the flange is connected with the embedded steel plate bolts, and then the buoyant box is hoisted to the flange, and the buoyant box and the flange are fastened by bolts .

Notable effect of the present invention is:

1. Since it is directly assembled in the deep sea, it is not limited by the size of the area. The size of the floating pile can be designed to be very long. In addition, the reinforced concrete material of the floating pile is heavy, so that the buoyancy center of the floating pile is much higher than the center of gravity. It has high stability when it works, because when the platform is slightly deflected, it will generate a larger moment to make the platform right. It is precisely because of the good stability that the volume of the buoyant tank can be appropriately reduced and the production cost is reduced.

2. In terms of the installation method, it is original to propose to install the mechanical arm on the working boat to fix the floating pile and the floating box to prevent shaking during the installation process. Under such conditions, the offshore installation can greatly reduce the difficulty of hoisting , a breakthrough to solve the obstacles of deep-sea assembly, and realize the in-situ assembly of the floating wind turbine system in deep sea.

As we all know, the shallow sea installation and transportation method of the prior art is expensive, but if the installation and transportation method of the present invention is adopted and installed on site, a floating platform with a draft of more than 50m can be obtained, and the installation and transportation costs can be reduced, and the overall Difficulty of floating.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is the elevation view of the floating pile platform of the present invention.

In the figure: 1—machine room, 2—wind wheel, 3—tower, 4—bolt, 5—pontoon, 6—flange, 7—steel plate, 8—floating pile, 9—anchor chain, 10—anchor body , 13-conical protrusion.

detailed description

As shown in Figure 1, a floating pile platform suitable for wind power generators includes an anchor body 10 located on the seabed, an anchor chain 9 connected to the anchor body 10, a steel tower 3, and a steel tower 3 installed on the top of the tower 3. The nacelle 1 and the wind wheel 2 connected to the nacelle 1. The bottom of the tower 3 is detachably connected with a steel hollow buoyancy tank 5 , and the bottom of the buoyancy tank 5 is detachably connected with a hollow floating pile 8 .

The floating pile 8 is prefabricated by reinforced concrete material. A steel plate 7 is pre-embedded on the top, and the buoyant tank 5 and the floating pile 8 are fixedly connected by a flange 6 . The bottom of the floating pile 8 is provided with irrigation holes.

The other end of the anchor chain 9 is connected with the top of the floating pile 8 .

The bottom of the tower tube 3 and the bottom of the buoyancy tank 5 are all provided with conical grooves, and the top of the buoyancy tank 5 and the top of the floating pile 8 are all provided with conical protrusions 13 .

The floating pile 8 and the buoyant tank 5 are positioned through the cooperation of the conical protrusion 13 and the conical groove, and the buoyant tank 5 and the tower tube 3 are positioned through the cooperation of the conical protrusion 13 and the conical groove.

Correspondingly, this embodiment also provides an installation method suitable for the above-mentioned floating pile platform, which is characterized in that it includes the following steps:

(a) Prefabricate the buoyant tank 5, floating pile 8, tower 3, engine room 1, and wind wheel 2 on the shore or in the shoal area, and transport them to the place where the wind turbine is to be installed;

(b) Fill the counterweight into the floating pile 8, so that the floating pile 8 is in an upright state;

(c) Connect the top of the floating pile 8 to the anchor body 10 with the anchor chain 9;

(d) Rigidly connecting the working boat to the upper part of the floating pile 8; the working boat includes a lifting device, especially a mechanical arm capable of hugging the floating pile 8 is installed on the working boat;

Embrace the floating pile 8 with the mechanical arm on the working boat, so that the working boat and the floating pile 8 are relatively stationary;

(e) Lift the floating box 5 and assemble it with the floating pile 8, then loosen the mechanical arm holding the floating pile 8, so that the working boat and the floating pile 8 are relatively separated, and at this time the floating pile 8 and the floating box 5 are integrated , the floating pile 8 sinks and is completely submerged in the water; part of the buoy box 5 is located above the sea level, and part of it is located below the sea level;

(f) Embrace the floating pile 8 with the mechanical arm on the working boat, and rigidly connect the working boat to the upper part of the floating pile 8, so that the working boat and the floating pile 8 are relatively static;

(g) Lifting the integral parts assembled by the tower 3, the nacelle 1 and the wind wheel 1, and connecting the bottom of the tower 3 with the top of the buoyancy tank 5;

(h) Completely loosen the connection between the working boat and the floating pile 8, lower the anchor and adjust the line shape of the anchor chain 9 to make it reach the final design position.

In a preferred embodiment, the method of transporting the floating piles 8 in step (a) is to place the floating piles 8 directly on the sea surface and float them.

In another preferred embodiment, the bottom of the floating pile 8 is provided with a water irrigation hole, and the method of filling the counterweight in the floating pile 8 in step (b) is to directly pour water into the hollow cavity of the floating pile 8 from the water irrigation hole to achieve After the designed irrigation volume, the irrigation hole is blocked.

In another preferred embodiment, the steel plate 7 is pre-embedded on the top of the floating pile 8, and a flange 6 is provided between the buoy box 5 and the floating pile 8; Hoist to the top of the floating pile 8, the flange 6 is connected with the embedded steel plate 7 by bolts, then the buoyant tank 5 is hoisted on the flange 6, and the buoyant tank and the flange 6 are fastened by the bolt 4.

Claims (8)

1. one kind is applicable to the floating stake formula platform of wind power generating set, comprise the anchor body (10) of being located at seabed, anchor chain (9), the tower cylinder (3) being connected with anchor body (10), the wind wheel (2) that is installed on the cabin (1) at tower cylinder (3) top, is connected with cabin (1), it is characterized in that: the dismountable hollow buoyancy tank (5) that is connected with in described tower cylinder (3) bottom, buoyancy tank (5) bottom is dismountable is connected with hollow floating stake (8), and described floating stake (8) forms for Reinforced Concrete Materials is prefabricated; Anchor chain (9) other end is connected with floating stake (8) top.

2. the floating stake formula platform that is applicable to wind power generating set according to claim 1, is characterized in that: described floating stake (8) bottom is provided with water irrigating hole.

3. the floating stake formula platform that is applicable to wind power generating set according to claim 1, is characterized in that: described floating stake (8) top pre-embedded steel slab (7), is fixedly connected with by ring flange (6) between buoyancy tank (5) and floating (8).

4. the floating stake formula platform that is applicable to wind power generating set according to claim 1, it is characterized in that: described tower cylinder (3) bottom, buoyancy tank (5) bottom are equipped with conical socket, buoyancy tank (5) top, floating stake (8) top are equipped with tapered protrusion (13);

Floating stake (8) and buoyancy tank (5) position by the cooperation of tapered protrusion (13) and conical socket, and buoyancy tank (5) and tower cylinder (3) position by the cooperation of tapered protrusion (13) and conical socket.

5. an installation method that is applicable to the floating stake formula platform of claim 1, is characterized in that comprising the steps:

(a) on the coast or shoal area by buoyancy tank (5), floating stake (8), a tower cylinder (3), cabin (1), the each part of wind wheel (2) prefabricated completing respectively, and be transported to wind energy conversion system place to be installed;

(b) toward floating stake (8) interior filling mass, make floating stake (8) be erectility;

(c) will float stake (8) top with anchor chain (9) is connected with anchor body (10);

(d) workboat and floating stake (8) top are rigidly connected; Described workboat comprises boom hoisting, and the mechanical arm that can embrace floating stake (8) is especially also installed on workboat;

Embrace floating stake (8) with the mechanical arm on workboat, make workboat relative static with floating stake (8);

(e) lifting buoyancy tank (5) and with floating stake (8) assembly and connection, then unclamp the mechanical arm of embracing floating stake (8), make workboat and float stake (8) in relative separation, now floating stake (8) becomes an entirety with buoyancy tank (5), and floating (8) sink to all submerging in water; More than buoyancy tank (5) part is positioned at sea level, part is positioned at b.s.l.;

(f) embrace floating stake (8) with the mechanical arm on workboat, workboat and floating stake (8) top are rigidly connected, make workboat relative static with floating stake (8);

(g) single piece that lifting is assembled by tower cylinder (3), cabin (1), wind wheel (1), and tower cylinder (3) bottom is connected with buoyancy tank (5) top;

(h) be totally released being connected of workboat and floating stake (8), cast anchor and adjust the line style of anchor chain (9), make it to reach final design position.

6. the installation method of floating stake formula platform according to claim 5, is characterized in that: the mode of transporting floating stake (8) in step (a) adopts direct lie low the across the sea mode of transportation by driving of (8) placement of will float.

7. the installation method of floating stake formula platform according to claim 5, it is characterized in that: described floating stake (8) bottom is provided with water irrigating hole, in step (b), pour water for directly wanting to float in stake (8) hollow cavity from water irrigating hole toward the mode of floating stake (8) interior filling mass, reach design irrigation quantity and afterwards water irrigating hole is blocked.

8. the installation method of floating stake formula platform according to claim 5, is characterized in that: described floating stake (8) top pre-embedded steel slab (7), is provided with ring flange (6) between buoyancy tank (5) and floating stake (8);

In step (e) by workboat by ring flange (6) lifting to floating stake (8) top, ring flange (6) is connected with pre-embedded steel slab (7) bolt, then buoyancy tank (5) is lifted to ring flange (6) upper, by bolt (4) by fastening to buoyancy tank and ring flange (6).