An offshore wind power integral installation device and method using a mat-float

Abstract

The present invention provides an integral installation device for offshore wind power using a sunken mat - floating box, which includes a cylindrical foundation. Auxiliary floating boxes are arranged around the cylindrical foundation, and the auxiliary floating boxes are buckled on the outer edge of the top cover of the cylindrical foundation. A cylinder cable buckle is arranged on the auxiliary floating box, and a floating box cable buckle is arranged on the cylindrical foundation. A sunken mat is arranged below the cylindrical foundation, and at least two winches are fixedly arranged on the sunken mat. The winches are connected to the auxiliary floating box and the cylindrical foundation through cables passing through the cylinder cable buckle and the floating box cable buckle. A transition section is fixedly arranged above the cylindrical foundation, and a tower barrel is fixedly arranged above the transition section. In the present invention, the downward pulling forces of the stress points in all directions of the cylindrical foundation are balanced, controllable, and adjustable during the sinking process, maintaining the stability of the whole machine during the sinking process.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power, and more specifically, to a prefabrication method for a film-covered offshore wind power foundation structure. Background Art

[0002] Offshore wind power has the advantages of low turbulence intensity, excellent wind resources, no occupation of arable land, and proximity to the developed coastal areas of our country, and has developed rapidly in recent years. Recently, a number of offshore wind farms have been successively built or are under construction in the eastern sea areas of our country, and the installed capacity has been continuously increasing. Therefore, a fast, efficient construction, building, and construction method is a key factor to help future offshore wind power enter a high-speed development stage.

[0003] The composite cylindrical foundation structure is an offshore wind power foundation structure form that has developed and been applied rapidly in recent years. Compared with the traditional pile foundation structure, the cylindrical foundation is constructed by the negative pressure sinking method. The foundation structure has strong anti-overturning ability and has the function of "one-step" installation of the whole machine. The so-called "one-step" installation means that the foundation structure, tower barrel, and machine head can be prefabricated and installed on the shore, and then, the whole is towed to the installation site and sunk as a whole.

[0004] At present, the cylindrical foundation and its "one-step" installation technology are just in the initial stage. Due to the "one-step" installation requiring the whole machine of the foundation, tower barrel, and machine head to be towed and sunk, the center of gravity is relatively high, and the requirements for the sinking speed, tilt angle, and attitude control during the sinking process are very high. The tilt angle generally cannot exceed 0.5%. Compared with the shallow sea environment, the wind and waves are greater and the sea current speed is faster in the deep sea environment.

[0005] Therefore, there is an urgent need for a technical solution in the prior art that can improve the cylindrical foundation structure in the deep sea environment in a "one-step" installation manner. Summary of the Invention

[0006] In view of the above deficiencies of the prior art, the present invention provides a safe, fast, efficient, and economical offshore wind power integral installation device and method using a sinker-floater.

[0007] To achieve the above object, the present invention is realized through the following technical solutions:

[0008] An offshore wind power integral installation device using a caisson - floating box, comprising a cylindrical foundation. Auxiliary floating boxes are arranged around the cylindrical foundation. The auxiliary floating boxes are buckled on the outer edge of the top cover of the cylindrical foundation. A cylindrical body cable buckle is arranged on the auxiliary floating boxes, and floating box cable buckles are arranged on the cylindrical foundation. An exhaust valve and a drain valve are arranged on the cylindrical foundation. The exhaust valve is connected to an air extraction pump, and the drain valve is connected to a water extraction pump. A caisson is arranged below the cylindrical foundation. An airbag, an inflation device, an exhaust device, a water filling device and a drainage device are arranged inside the caisson. At least two winches are fixedly arranged on the caisson. The winches are connected to the auxiliary floating boxes and the cylindrical foundation through cables passing through the cylindrical body cable buckles and the floating box cable buckles. A transition section is fixedly arranged above the cylindrical foundation, and a tower barrel is fixedly arranged above the transition section.

[0009] At least two anti - collision cushion blocks are padded between the auxiliary floating box and the cylindrical foundation.

[0010] There are six anti - collision cushion blocks in total, which are arranged at equal intervals on the outer edge of the top cover of the cylindrical foundation.

[0011] The transition section is fixedly connected to the tower barrel through a flange.

[0012] The floating box cable buckles are arranged on the inner wall and the outer wall of the auxiliary floating box, and the cylindrical body cable buckles are arranged on the outer edge of the top cover of the cylindrical foundation.

[0013] The auxiliary floating box is a steel structure with a hollow interior and a horizontal cross - section in the shape of C or U.

[0014] The caisson is a reinforced concrete structure with a hollow interior and a horizontal cross - section in the shape of C or U.

[0015] The transition section is a steel reinforcement cage.

[0016] Six winches are fixedly arranged on the caisson.

[0017] The present invention also provides another technical solution as follows.

[0018] An offshore wind power integral installation method using a caisson - floating box, comprising the following steps:

[0019] (1) Assemble the transition section, flange and tower barrel from bottom to top above the cylindrical foundation. Fix one end of the cable on the winch, sink the caisson to the seabed, and the cable floats with the buoyancy of the sea water; and tow the auxiliary floating box, anti - collision cushion blocks and cylindrical foundation to the designated sinking location.

[0020] (2) Slip the cable onto the cable buckle on the outer edge of the top cover of the cylindrical foundation, pass one end of the cable through the cable buckle on the inner and outer walls of the auxiliary floating box, and then connect it to the winch;

[0021] (3) Start the winch. The winch pulls down the auxiliary floating box through the cable, drives the anti-collision cushion block, the cylindrical foundation, and drives the transition section, the flange plate, and the entire tower barrel to sink. During the sinking process, the air pump connected by the valve on the cylindrical foundation is used to pump air to adjust the air pressure and air pressure distribution inside the cylindrical foundation;

[0022] (4) After the cylindrical foundation sinks to the designated mud surface, open the cable buckle on the cylinder and the cable buckle on the floating box, untie the cable, and gradually lift the auxiliary floating box to the water surface by the winch; at the same time, the water pump connected by the valve on the cylindrical foundation pumps water to create a negative pressure inside the cylindrical foundation, so as to continue to sink below the mud surface; until the cylindrical foundation sinks to the target depth below the mud surface and the auxiliary floating box rises to the water surface, tow the auxiliary floating box away by a tugboat;

[0023] (5) Inflate the sinking cushion with an inflation device and discharge the water body inside the sinking cushion through a drainage device to make the sinking cushion float;

[0024] (6) The tugboat tows the sinking cushion away.

[0025] The beneficial effects of the present invention compared with the prior art are as follows:

[0026] 1. The sinking cushion is equipped with air inflation and deflation, water filling and drainage devices, and uses the gravity of the sinking cushion to provide the uplift force during the sinking process. Then, the winch is used to control the pulling-down process, and air is inflated, deflated, water is filled or drained according to the actual needs on site, so as to control the downward pulling force of the force application points in all directions of the cylindrical foundation during the sinking process to be balanced, controllable, and adjustable, avoiding the risk of excessive inclination caused by uneven stress during the sinking process, and greatly maintaining the stability of the whole machine during the sinking process;

[0027] 2. The floating box and the cable can provide a restoring force for the cylindrical foundation during sinking and swaying. When the whole machine sinks and the inclination angle is too large, the cable is tightened to straighten the whole machine structure, thereby further improving the stability during the sinking process;

[0028] 3. The cable can be flexibly fastened or disassembled on the cable buckle, and the operation process is very simple;

[0029] 4. The sinking cushion can be inflated and drained to float, and deflated and filled with water to sink, and has the function of being reusable, improving the utilization efficiency of the device;

[0030] 5. The design and manufacture of components such as the sinking cushion, the floating box, and the cable are simple, the cost is low, and they are easy to manufacture. Description of the Drawings

[0031] Figure 1 is a schematic structural diagram of an integral offshore wind power installation device using a mat - floating box.

[0032] Figure 2 is Figure 1 the top view of.

[0033] Figure 3 is Figure 1 the side view of.

[0034] Figure 4 is Figure 3 the partial enlarged view at A in.

[0035] Figure 5 is a schematic diagram of step (1) of the integral offshore wind power installation method using a mat - floating box.

[0036] Figure 6 is a schematic diagram of step (2) of the integral offshore wind power installation method using a mat - floating box.

[0037] Figure 7 is a schematic diagram of step (3) of the integral offshore wind power installation method using a mat - floating box.

[0038] Figure 8 is a schematic diagram of step (4) of the integral offshore wind power installation method using a mat - floating box.

[0039] Figure 9 is a schematic diagram of step (5) of the integral offshore wind power installation method using a mat - floating box.

[0040] Figure 10 is a schematic diagram of step (6) of the integral offshore wind power installation method using a mat - floating box.

[0041] Reference numerals: 1 - mat, 2 - winch, 3 - floating box, 41 - cylinder cable buckle, 42 - floating box cable buckle, 5 - anti - collision cushion block, 6 - cable, 7 - cylindrical foundation, 8 - transition section, 9 - flange, 10 - tower barrel, 11 - seabed. Detailed Implementation Manner

[0042] As Figure 1-4The overall offshore wind power installation device using a mat - pontoon, as shown in the figure, includes a cylindrical foundation 7. Auxiliary pontoons 3 are arranged around the cylindrical foundation 7. The auxiliary pontoons 3 are buckled on the outer edge of the top cover of the cylindrical foundation 7. The inner diameter of the auxiliary pontoon 3 is slightly smaller than the outer diameter of the cylindrical foundation 7, and the outer diameter is larger than the outer diameter of the cylindrical foundation 7. There are ribs on the inner side of the auxiliary pontoon 3, which can hold the cylindrical foundation 7. At least two anti - collision pads 5 are provided between the auxiliary pontoon 3 and the cylindrical foundation 7 to increase the stability of the cylindrical foundation 7 during the sinking process. In this embodiment, there are a total of six anti - collision pads 5, which are arranged at equal intervals on the outer edge of the top cover of the cylindrical foundation 7. In other embodiments of the present invention, the number of anti - collision pads 5 can be eight, ten or more. A barrel cable buckle 41 is provided on the auxiliary pontoon 3, and a pontoon cable buckle 42 is provided on the cylindrical foundation 7. In this embodiment, the pontoon cable buckle 42 is arranged on the inner and outer walls of the auxiliary pontoon 3, and the barrel cable buckle 41 is arranged on the outer edge of the top cover of the cylindrical foundation 7. An exhaust valve and a drain valve are provided on the cylindrical foundation 7. The exhaust valve is connected to an air extraction pump, and the drain valve is connected to a water extraction pump. A mat 1 is provided below the cylindrical foundation 7. An airbag, an inflation device, an exhaust device, a water filling device and a drainage device are arranged inside the mat 1. At least two winches 2 are fixedly arranged on the mat 1. In this embodiment, six winches are fixedly arranged on the mat 1 and are evenly arranged on the mat 1. There are also six groups of barrel cable buckles 41 and pontoon cable buckles 42 respectively. Each group of barrel cable buckles 41 and pontoon cable buckles 42 corresponds to each winch 2. The winch 2 is connected to the auxiliary pontoon 3 and the cylindrical foundation 7 through a cable 6 passing through the barrel cable buckle 41 and the pontoon cable buckle 42. A waterproof protective shell is provided on the outer shell of each winch 2. A transition section 8 is fixedly arranged above the cylindrical foundation 7. The transition section 8 is a steel reinforcement cage. A tower barrel 10 is fixedly arranged above the transition section 8. The transition section 8 is fixedly connected to the tower barrel 10 through a flange 9. The wind turbine is installed on the tower barrel 10. The auxiliary pontoon 3 is a steel structure with a hollow interior and a horizontal cross - sectional shape of C - type or U - type. In this embodiment, the horizontal cross - sectional shape of the auxiliary pontoon 3 is C - type. The mat 1 is a reinforced concrete structure with a hollow interior and a horizontal cross - sectional shape of C - type or U - type. In this embodiment, the horizontal cross - sectional shape of the mat 1 is C - type, with an outer diameter of 100 m and a height of 5 m. In this embodiment, the inner diameter of the auxiliary pontoon 3 is 25 m, the outer diameter is 35 m; the diameter of the cylindrical foundation 7 is 30 m and the height is 10 m, and the height of the transition section 8 is 30 m.

[0043] As Figure 4-10 shown, the overall offshore wind power installation method using a mat - pontoon includes the following steps:

[0044] (1) Assemble the transition section 8, the flange 9 and the tower barrel 10 in sequence from bottom to top above the cylindrical foundation 7. Fix one end of the cable 6 on the winch 2, sink the mat 1 to the seabed 11, and the cable 6 floats with the buoyancy of the sea water; and tow the auxiliary pontoon 3, the anti - collision pads 5 and the cylindrical foundation 7 to the designated sinking location;

[0045] (2) Place the cable 6 on the cylinder cable buckle 41 on the outer edge of the top cover of the cylindrical foundation 7, pass one end of the cable 6 through the cable buckle 42 on the inner and outer walls of the auxiliary floating box 3, and then connect it to the winch 2;

[0046] (3) Start the winch 2. The winch 2 pulls down the auxiliary floating box 3 through the cable 6, drives the anti-collision cushion block 5 and the cylindrical foundation 7, and drives the transition section 8, the flange 9 and the tower barrel 10 to sink as a whole. During the sinking process, air is pumped out through the air extraction pump connected by the valve on the cylindrical foundation 7 to adjust the air pressure and air pressure distribution inside the cylindrical foundation 7, so as to make the sinking process safe and stable. When the cylindrical foundation 7 tilts, the cable 6 will be tightened, thus pulling back the whole machine structure;

[0047] (4) After the cylindrical foundation 7 sinks to the designated mud surface, open the cylinder cable buckle 41 and the floating box cable buckle 42, untie the cable 6, and gradually lift the auxiliary floating box 3 to the water surface through the winch 2; At the same time, the water pump connected by the valve on the cylindrical foundation 7 pumps water, so that a negative pressure is formed inside the cylindrical foundation 7, so as to continue to sink below the mud surface; Until the cylindrical foundation 7 sinks to the target depth below the mud surface and the auxiliary floating box 3 rises to the water surface, tow the auxiliary floating box 3 away by a tugboat;

[0048] (5) Inflate the sinking cushion 1 through the inflation device and discharge the water body in the sinking cushion 1 through the exhaust device to make the sinking cushion 1 float;

[0049] (6) The tugboat tows the sinking cushion 1 away.

[0050] The inflation device in the sinking cushion 1 adopts an electronic air pump, the exhaust device adopts an electronic air extraction pump, and gas is pumped into or out of the sinking cushion 1 according to the on-site needs. The water filling device in the sinking cushion 1 adopts a water supply pump, and the drainage device adopts a water pump. Water can be supplied and drained into the sediment in time according to the needs during the sinking or floating process of the sinking cushion 1. A fan is installed on the tower barrel 10, and the fan can sink together with components such as the tower barrel 10 and the cylindrical foundation 7.

[0051] After the above six steps are completed, the above method can be repeated at the next installation position to install the next fan.

[0052] The above is only the preferred embodiment of the present invention, but the present invention is not limited to the above specific embodiments. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. An offshore wind power integral installation device using a sunken mat - floating box, including a cylindrical foundation (7), characterized in that, An auxiliary floating box (3) is arranged around the cylindrical foundation (7). The auxiliary floating box (3) is buckled on the outer edge of the top cover of the cylindrical foundation (7). A floating box cable buckle (42) is arranged on the auxiliary floating box (3), and a cylindrical body cable buckle (41) is arranged on the cylindrical foundation (7). An exhaust valve and a drain valve are arranged on the cylindrical foundation (7). The exhaust valve is connected with an air extraction pump, and the drain valve is connected with a water extraction pump. A mattress (1) is arranged below the cylindrical foundation (7). An air bag, an inflation device, an exhaust device, a water filling device and a drainage device are arranged inside the mattress (1). At least two winches (2) are fixedly arranged on the mattress (1). The winches (2) are connected with the auxiliary floating box (3) and the cylindrical foundation (7) through a cable (6) passing through the cylindrical body cable buckle (41) and the floating box cable buckle (42). A transition section (8) is fixedly arranged above the cylindrical foundation (7), and a tower barrel (10) is fixedly arranged above the transition section (8). The floating box cable buckle (42) is arranged on the inner wall and the outer wall of the auxiliary floating box (3), and the cylindrical body cable buckle (41) is arranged on the outer edge of the top cover of the cylindrical foundation (7). At least two anti-collision cushion blocks (5) are arranged between the auxiliary floating box (3) and the cylindrical foundation (7).

2. The overall offshore wind power installation device using a mat - pontoon according to claim 1, characterized in that, There are six anti-collision cushion blocks (5) in total, which are arranged at equal intervals on the outer edge of the top cover of the cylindrical foundation (7).

3. The offshore wind power integral installation device using a mat - pontoon according to claim 1, characterized in that, The transition section (8) is fixedly connected with the tower barrel (10) through a flange plate (9).

4. The overall offshore wind power installation device using a mat - pontoon according to claim 1, characterized in that, The auxiliary floating box (3) is a steel structure with a hollow interior and a horizontal cross-sectional shape of C or U.

5. The overall offshore wind power installation device using a mat - pontoon according to claim 1, characterized in that, The mattress (1) is a reinforced concrete structure with a hollow interior and a horizontal cross-sectional shape of C or U.

6. The overall offshore wind power installation device using a mat-floater according to claim 1, characterized in that, The transition section (8) is a steel reinforcement cage.

7. The overall offshore wind power installation device using a mat - pontoon according to claim 1, characterized in that, Six winches are fixedly arranged on the mattress (1).

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