Installation apparatus and method for offshore wind power plant

Abstract

The application discloses an offshore wind power device installation equipment and method, and the installation method comprises hoisting: a main crane and an auxiliary crane hoist a single pile to a set height; turning into water: the main crane remains stationary, and the auxiliary crane lowers a pile tail end, so that the pile tail end rotates around a pile head end and gradually sinks into water together with an air bag assembly; entering mud: after the single pile changes into a vertical state, the main crane lowers the single pile into mud, and the air bag assembly deflates in the process of entering mud; the air bag assembly is removed after the single pile enters mud by self weight; and pile sinking construction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of offshore wind power devices, in particular to an installation device and method for offshore wind power devices. BACKGROUND

[0002] China has abundant offshore wind energy resources and great development and utilization potential. Offshore wind power devices play an increasingly important role in the "carbon peak and carbon neutral" due to their clean and low-carbon nature and proximity to the power load side in the southeast coastal areas. Developing offshore wind power devices is considered an important strategic support for the transformation of China's energy structure. At present, the development and construction of domestic offshore wind power devices are gradually entering the fast lane, and domestic coastal provinces such as Fujian, Jiangsu, Guangdong, Zhejiang, and Shandong have begun to vigorously develop the construction of offshore wind power devices.

[0003] At present, offshore wind power devices include wind turbines, which are developing towards large-scale, with the power of wind turbines increasing from 4mw to 6mw-7mw. In the future, the large-scale trend of offshore wind power device models will accelerate, and even wind turbines with a power of more than 20mw may appear. With the increase in the power of wind turbines, the weight of the device single pile assembly used to support the wind turbines gradually increases. In the future, the weight of a single pile will exceed 2500t. The main crane of the floating crane ship currently used to install the single pile has a small lifting weight and gradually cannot meet the requirements of large-weight single piles. Using a large-lifting-weight main crane to install the single pile will result in an increase in the overall volume of the floating crane ship, thereby significantly increasing the cost of installing the single pile.

[0004] Therefore, there is an urgent need to provide a technical solution that enables a crane with a smaller lifting weight to install a single pile with a larger weight. SUMMARY

[0005] An object of the present application is to provide a new technical solution for an installation device and method for offshore wind power devices. The construction method of the single pile is improved to enable a floating crane with a smaller lifting weight to install a single pile with a larger weight.

[0006] In one aspect of the present application, an installation device for offshore wind power devices is provided, the single pile assembly comprising a single pile and an air bag assembly, the air bag assembly being connected to the single pile, the installation device comprising a main crane and an auxiliary crane, the main crane being used to connect to the pile head end, and the auxiliary crane being used to connect to the pile tail end.

[0007] According to the embodiment of the present application, by setting the air bag assembly capable of being connected with the single pile to provide the buoyancy for the single pile, the lifting capacity requirement of the floating crane for lifting the single pile can be effectively reduced, so that the single pile with large weight can be lifted when the lifting capacity of the main crane is less than the weight of the single pile, the problem of insufficient lifting capacity of the offshore floating crane is solved under the trend of increasing megawatt of the wind turbine and increasing weight of the single pile foundation, the purpose of doing more with less is achieved, and the installation cost of the offshore wind power device can be significantly reduced.

[0008] Another aspect of the present application provides a method for installing a single pile assembly, the method comprising lifting: lifting the single pile by the main crane and the auxiliary crane to a set height;

[0009] Turning into water: the main crane remains stationary, and the auxiliary crane lowers the tail end of the pile to make the tail end of the pile rotate around the head end of the pile and gradually sink into the water together with the air bag assembly;

[0010] Into mud: after the single pile is changed into a vertical state, the main crane lowers the single pile for mud entering construction;

[0011] Pile sinking construction.

[0012] By connecting the air bag assembly to the single pile during the installation of the single pile, the method of the present application can gradually replace the pulling force of the auxiliary crane on the single pile with the buoyancy of the air bag assembly during the process of the single pile gradually entering the water, prevent the lifting capacity of the main crane from being insufficient for lifting the single pile with large weight, and further enable the main crane with small lifting capacity to install the single pile with weight greater than the rated lifting capacity, thereby significantly reducing the installation cost of the single pile with large weight and improving the convenience and economy of the installation of the single pile with large weight.

[0013] Optionally, it further comprises:

[0014] Laying air bags: the air bag assembly is connected to the single pile in an uninflated state, and the air bag assembly is inflated before lifting.

[0015] Optionally, before the step of entering mud, it further comprises:

[0016] Feeding the pile, placing the single pile in the pile grab by the main crane.

[0017] Optionally, in the step of feeding the pile, it further comprises:

[0018] When the single pile is about to enter the pile grab, the single pile is transversely pulled along the radial direction of the single pile.

[0019] Optionally, in the step of the single pile entering mud, it comprises:

[0020] Self-weight entering mud: the pulling force of the main crane on the single pile is controlled to make the single pile enter mud by self-weight.

[0021] Optionally, in the process of self-reentry into the mud, comprising:

[0022] Monitoring the air pressure of the airbag assembly, and inflating the airbag assembly when the air pressure of the airbag assembly is less than a set threshold.

[0023] Optionally, in the step of reentry into the mud, further comprising:

[0024] Before the airbag assembly reenters into the mud, separating the airbag assembly from the single pile;

[0025] After the airbag assembly is separated from the single pile, the main crane controls the single pile to complete the reentry into the mud construction.

[0026] Optionally, before separating the airbag assembly from the single pile, deflating the airbag assembly.

[0027] Other features of the present specification and its advantages will become apparent from the following detailed description of exemplary embodiments thereof, with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present specification and, together with the description, serve to explain the principles of the present specification.

[0029] Figure 1 is a schematic diagram of the state of the single pile hoisted in the installation method of the embodiment of the present specification, which is a top view perspective;

[0030] Figure 2 is a schematic diagram of the state of the single pile turning over and entering water in the installation method of the embodiment of the present specification, which is a side view perspective;

[0031] Figure 3 is a schematic diagram of the state before feeding the pile in the installation method of the embodiment of the present specification;

[0032] Figure 4 is a schematic diagram of the state after feeding the pile in the installation method of the embodiment of the present specification;

[0033] Figure 5 is a schematic diagram of the state of the main crane and the single pile being separated after the reentry into the mud is completed in the installation method of the embodiment of the present specification;

[0034] Figure 6 is a schematic diagram of the state of the main crane hoisting the airbag assembly away from the single pile in the installation method of the embodiment of the present specification;

[0035] Figure 7 is a force line graph of the single pile in the embodiment of the present specification;

[0036] Figure 8 is a cross-sectional view of the single pile in the radial direction in the embodiment of the present specification;

[0037] Figure 9is a structural schematic view of the laying device in the embodiment of the present application, front view angle;

[0038] Figure 10 is a first step schematic view of the laying device in the embodiment of the present application for laying the air bag in a single pile;

[0039] Figure 11 is Figure 10 is a partial enlarged schematic view of

[0040] Figure 12 is a second step schematic view of the laying device in the embodiment of the present application for laying the air bag in a single pile;

[0041] Figure 13 is a third step schematic view of the laying device in the embodiment of the present application for laying the air bag in a single pile;

[0042] Figure 14 is a fourth step schematic view of the laying device in the embodiment of the present application for laying the air bag in a single pile;

[0043] Figure 15 is a fifth step schematic view of the laying device in the embodiment of the present application for laying the air bag in a single pile;

[0044] Figure 16 is a sixth step schematic view of the laying device in the embodiment of the present application for laying the air bag in a single pile;

[0045] Figure 17 is a seventh step schematic view of the laying device in the embodiment of the present application for laying the air bag in a single pile;

[0046] Figure 18 is an eighth step schematic view of the laying device in the embodiment of the present application for laying the air bag in a single pile;

[0047] Figure 19 is one of the structural schematic views of the single pile assembly in the embodiment of the present application;

[0048] Figure 20 is a partial structural enlarged schematic view of Figure 1 ;

[0049] Figure 21 is another of the structural schematic views of the single pile assembly in the embodiment of the present application;

[0050] Figure 22 is a structural schematic view of the automatic unhooking device of the single pile assembly in the embodiment of the present application;

[0051] Figure 23 is a side view of the second air bag lifting lug of the single pile assembly in the embodiment of the present application;

[0052] Figure 24is a top view of the second air bag lifting lug of the single pile assembly in the embodiment of the present application;

[0053] Figure 25 is a flowchart of the first hook part lifting the single pile in the embodiment of the present application, the first state;

[0054] Figure 26 is a flowchart of the first hook part lifting the single pile in the embodiment of the present application, the second state;

[0055] Figure 27 is a flowchart of the first hook part lifting the single pile in the embodiment of the present application, the third state;

[0056] Figure 28 is Figure 3 a sectional view in the vertical direction;

[0057] Figure 29 is a flowchart of the first hook part lifting the single pile in the embodiment of the present application, the fourth state;

[0058] Figure 30 is a flowchart of the first hook part lifting the single pile in the embodiment of the present application, the fifth state;

[0059] Figure 31 is Figure 30 a sectional view in the vertical direction;

[0060] Figure 32 is a flowchart of the second hook part lifting the single pile in the embodiment of the present application, the first state;

[0061] Figure 33 is a flowchart of the second hook part lifting the single pile in the embodiment of the present application, the second state;

[0062] Figure 34 is a flowchart of the second hook part lifting the single pile in the embodiment of the present application, the third state;

[0063] Figure 35 is a flowchart of the second hook part lifting the single pile in the embodiment of the present application, the fourth state;

[0064] Figure 36 is a flowchart of the second hook part lifting the single pile in the embodiment of the present application, the fifth state;

[0065] Figure 37 is a flowchart of the second hook part lifting the single pile in the embodiment of the present application, the sixth state;

[0066] Figure 38 is a flowchart of the second hook part lifting the single pile in the embodiment of the present application, the seventh state;

[0067] Figure 39is a flowchart of the process of hoisting the single pile by the second hook part in the embodiment of the present application, the eighth state;

[0068] Figure 40 is a schematic diagram of the hoisting state of the single pile in the embodiment of the present application.

[0069] Legend:

[0070] 1, single pile; 11, pile head end; 12, pile tail end; 13a, first pile body lifting lug;

[0071] 2, floating crane; 21, main crane; 22, auxiliary crane;

[0072] 3, pile holding frame; 31, stretching device; A1, first actual hoisting position; A2, second actual hoisting position; A3, initial hoisting position;

[0073] 4, laying device; 41, vehicle frame; 411, first port; 412, second port; 413, vehicle frame lifting lug; 43, roller assembly; 431, roller support; 432, wheel body; 422, winch; 4221, guide support; 4222, steel wire rope; 4223, roller; 4224, pulley; 4225, rack; 424, traction hook; 421a, first traction end; 421b, second traction end; 44, lifting device; 441, hydraulic rod; 442, platform;

[0074] 5, transport ship; 51, first adjusting rope; 51a, first rope head end; 51b, first rope tail end; 52, second adjusting rope; 52b, second rope tail end; 53, first hoisting rope; 54, third adjusting rope; 54a, hook; 55, second hoisting rope; 56, first hook part; 57, second hook part; 58, hoisting beam; 58a, beam head end; 58b, beam tail end; 59a, first steel wire rope; 59b, second steel wire rope;

[0075] 6, air bag assembly; 61, first air bag; 62, second air bag; 63, third air bag;

[0076] 7, air bag suspension part; 71, first air bag lifting lug; 72, second air bag lifting lug; 711, first lug plate; 712, second lug plate; 713, pin shaft; 714, limiting through slot; 715, third lug plate; 716, limiting boss;

[0077] 81, hanging rope; 83, connecting rope; 84, hoisting rope;

[0078] 9, connecting assembly; 91, automatic unhooking device; 911, body part; 912, connecting part; 913, locking pin; 914, driving part; 915, clamping arm; 92, hanging net; 921, first net port part; 922, second net port part. DETAILED DESCRIPTION

[0079] In order to make the person skilled in the art better understand the present application, the present application is further described in detail below in combination with the drawings and specific embodiments.

[0080] According to an embodiment of the present application, referring to Figure 1 and Figure 2 , an installation device for offshore wind power device is provided. The single pile assembly comprises a single pile 1 and a gasbag assembly 6 connected to the single pile 1. The installation device further comprises a main crane 21 and an auxiliary crane 22, wherein the main crane 21 is configured to be connected to the pile head end 11 and the auxiliary crane 22 is configured to be connected to the pile tail end 12.

[0081] For example, the single pile 1 is a cylindrical structure, and the gasbag assembly 6 is detachably connected to at least one of the inner wall and the outer wall of the single pile 1. The pile head end 11 and the pile tail end 12 refer to the end on the upper side of the single pile 1 in the vertical state of the single pile 1 as the pile head end 11 and the end on the lower side as the pile tail end 12.

[0082] According to an embodiment of the present application, by providing the gasbag assembly 6 connected to the single pile 1 to provide buoyancy for the single pile 1, the lifting capacity requirement of the floating crane for lifting the single pile 1 can be effectively reduced, so that the single pile 1 with a larger weight can be lifted when the lifting capacity of the main crane 21 is less than the weight of the single pile 1, thereby effectively reducing the installation cost of the single pile 1 of the offshore wind turbine.

[0083] Optionally, referring to Figure 3 , the installation device further comprises a pile embracing frame 3 arranged at a lower pile working position. The lower pile working position is a working position for installing the single pile 1.

[0084] According to an embodiment of the present application, an installation method for offshore wind power device single pile 1 is provided. The method comprises:

[0085] Lifting: as shown in Figure 1 , the main crane 21 and the auxiliary crane 22 lift the single pile 1 to a set height;

[0086] Turning into water: referring to Figure 2 , the main crane 21 remains stationary, and the auxiliary crane 22 lowers the pile tail end 12 to make the pile tail end 12 rotate around the pile head end 11 and gradually immerse into the water together with the gasbag assembly 6;

[0087] Into mud: after the single pile 1 changes to a vertical state, the main crane 21 lowers the single pile 1 to perform mud entering construction;

[0088] Pile sinking construction.

[0089] Specifically, as shown in Figure 1As shown, the single pile 1 is transported to the construction site by the transport ship 5. The air bag assembly 6 is arranged and connected to the single pile 1 at a set position. For example, the air bag assembly 6 is evenly arranged along the radial outer wall of the single pile 1; or the single pile 1 is a cylindrical structure, and the air bag assembly 6 is arranged on the inner wall of the single pile 1.

[0090] In one specific embodiment, with reference to Figures 9-18 The air bag assembly 6 arrangement device 4 in the embodiment is described. The arrangement device 4 is used to arrange the air bag assembly 6 in the single pile 1, and the air bag assembly 6 is detachably connected to the single pile 1. For example, the air bag assembly 6 includes at least one air bag group, and each air bag group includes at least one air bag. For example, the air bag assembly 6 includes a first air bag group 6a and a second air bag group 6b. The arrangement device 4 enters the single pile 1 from the pile head end 11 or the pile tail end 12 to transport the air bag assembly 6 into the single pile 1, and the air bag assembly 6 arrangement device 4 includes a frame 41, a driving device, and a plurality of roller assemblies 43.

[0091] The frame 41 is used to accommodate the air bag assembly 6 to be installed. The frame 41 surrounds a cavity, a first opening 411 is formed at the top end of the frame 41, and a second opening 412 is formed at the side of the frame 41, which is used to drive the frame 41 to move in the axial direction of the single pile 1. For example, the air bag assembly 6 to be installed is repeatedly folded and arranged in the cavity, and the folded air bag assembly 6 can be arranged in the single pile 1 through the second opening 412.

[0092] The plurality of roller assemblies 43 are symmetrically arranged on the bottom of the frame 41 in the width direction of the frame 41. In the length direction of the frame 41, a plurality of roller assemblies 43 are arranged. The number of roller assemblies 43 can be determined by those skilled in the art according to the size of the frame 41 and the required load of the frame 41.

[0093] The roller assembly 43 includes a roller bracket 431 and a wheel body 432 rotationally connected to the roller bracket 431, and the wheel body 432 can rotate relative to the roller bracket 431 to drive the roller bracket 431 to move in the single pile 1. The roller bracket 431 is bent towards the direction away from each other, and the wheel body 432 abuts against the inner wall of the single pile 1. The bent roller bracket 431 enables the outer surface of the wheel body 432 to be attached to the inner wall of the single pile 1, so that the roller bracket 431 can move in the cylindrical single pile 1.

[0094] The air bag assembly 6 is arranged in the vehicle frame 41 in an un-inflated and folded state. The driving device can provide power to the vehicle frame 41. The vehicle frame 41 can move in the axial direction of the monopile 1 under the driving of the driving device. The air bag assembly 6 is transported to a designated position in the monopile 1 during the movement of the arrangement device 4. Thus, the air bag assembly 6 is transported to the monopile 1 by the arrangement device 4. After the air bag assembly 6 in the monopile 1 is inflated, the air bag assembly 6 can provide buoyancy to the monopile 1 after the monopile 1 enters the water. Thus, the lifting capacity requirement of the floating crane for lifting the monopile 1 can be effectively reduced. Therefore, a crane with smaller lifting capacity can be used to install a monopile 1 with larger weight.

[0095] Specifically, the driving device includes a plurality of traction ends, a winch 422, and a steel wire rope 4222. The traction ends are fixed to the inner wall of the monopile 1. For example, the plurality of traction ends include a first traction end 421a and a second traction end 421b arranged on the inner wall of the monopile 1 in the axial direction. The first traction end 421a is closer to the pile head end 11 of the monopile 1, and the second traction end 421b is located at the pile tail end 12 of the monopile 1. The air bag assembly 6 is arranged between the first traction end 421a and the second traction end 421b. The first traction end 421a is, for example, a traction lug fixed to the inner wall of the monopile 1. The steel wire rope 4222 can pass through the traction lug. The first traction end 421a and the second traction end 421b define the range of axial movement of the arrangement device 4 in the monopile 1.

[0096] Referring to Figure 11 The winch 422 is fixed to the vehicle frame 41. The steel wire rope 4222 is wound around the winch 422. When the vehicle frame 41 moves from the pile head end 11 of the monopile 1 towards the pile tail end 12, the steel wire rope 4222 is connected to the traction end located on the front side of the moving direction of the vehicle frame 41, or passes through the traction end located on the front side of the moving direction of the vehicle frame 41 and is connected to the vehicle frame 41.

[0097] Specifically, the steel wire rope 4222 includes a fixed end and a connection end. The fixed end is fixed to the winch 422. Specifically, the winch 422 includes a frame 4225, a rotating shaft, a drum 4223, and a pulley 4224. One end of the frame 4225 is fixed to the vehicle frame 41. The pulley 4224 is arranged at the other end of the frame 4225. The drum 4223 is sleeved on the rotating shaft and is rotationally connected to the frame 4225 through the rotating shaft. The fixed end is connected to the rotating shaft. When the rotating shaft starts to rotate, the steel wire rope 4222 is wound on the drum 4223. The connection end of the steel wire rope 4222 is connected to the traction end located on the front side of the moving direction of the vehicle frame 41, or passes through the traction end located on the front side of the moving direction of the vehicle frame 41 and is connected to the vehicle frame 41.

[0098] Optionally, the winch 422 comprises a guide bracket 4221 which cooperates with the wire rope 4222, the guide bracket 4221 is bent downward in the height direction of the vehicle frame 41 and is located below the bottom of the vehicle frame 41. In this way, the wire rope 4222 is prevented from interfering with the bottom end of the vehicle frame 41, and the pulley 4224 is arranged on the guide bracket 4221, and the wire rope 4222 can slide along the pulley 4224.

[0099] For example, referring to Figure 10 and Figure 11 , when the vehicle frame 41 moves from the pile head end 11 to the pile tail end 12 of the single pile 1, the local part of the wire rope 4222 is arranged through the first traction end 421a, and both ends of the wire rope 4222 are connected with the vehicle frame 41. The connecting end of the wire rope 4222 is connected with the vehicle frame 41 after passing through the first traction end 421a.

[0100] For example, in Figure 1 , Figure 2 and Figure 3 , the winch 422 is arranged on the side of the vehicle frame 41 close to the pile tail end 12. The traction hook 424 is arranged on the vehicle frame 41, and the winch 422 and the traction hook 424 are arranged on the two sides of the vehicle frame 41 in the axial direction.

[0101] For example, the traction hook 424 is arranged on the side of the vehicle frame 41 close to the pile head end 11. The connecting end of the wire rope 4222 is connected with the traction hook 424.

[0102] When the winch 422 starts to work, the drum 4223 starts to roll and wind the wire rope 4222, and the length of the wire rope 4222 extending out of the winch 422 becomes shorter. Since the first traction end 421a is a fixed end, the wire rope 4222 can drive the vehicle frame 41 to move towards the first traction end 421a.

[0103] In one example, referring to Figure 12 and Figure 13 , the laying device 4 further comprises a lifting device 44, the lifting device 44 comprises a hydraulic rod 441 and a platform 442, one end of the hydraulic rod 441 is installed on the vehicle frame 41, and the other end is connected to the platform 442. When it is needed to work on the upper side in the radial direction of the single pile 1, the hydraulic rod 441 lifts the platform 442 to a set position. The platform 442 is used to carry the construction personnel and the device to the radial height position of the single pile 1.

[0104] For example, referring to Figure 12When the frame 41 moves along the first direction, it will pass the second air bag lifting lug 72a and the first air bag lifting lug 71a on the inner wall of the single pile 1 in turn. The hydraulic rod 441 lifts the platform 442 close to the second air bag lifting lug 72a. The worker passes one end of the hanging rope 81 of the air bag assembly 6 through the second air bag lifting lug 72a and places the end of the hanging rope 81 on the side of the second air bag lifting lug 72a away from the first air bag lifting lug 71a to wait for connection with the air bag.

[0105] Referring to Figure 13 , similarly, when the laying device 4 moves to the first air bag lifting lug 71a, the worker connects the other end of the hanging rope 81 to the first air bag lifting lug 71a.

[0106] For example, Figures 14-18 As shown in the figure, when the frame 41 moves from the pile tail end 12 of the single pile 1 to the pile head end 11, one end of the steel wire rope 4222 is connected to the frame 41 through the winch 422, and the other end is connected to the second traction end 421b.

[0107] At this time, referring to Figure 14 , the connecting end of the steel wire rope 4222 is disconnected from the first traction end 421a, and the connecting end of the steel wire rope 4222 is connected to the second traction end 421b. The winch 422 starts to work, the drum 4223 winds the steel wire rope 4222, and the roller support 431 moves from the pile tail end 12 of the single pile 1 to the pile head end 11 under the action of the second traction end 421b and the winch 422. At this time, the end of the first air bag assembly 6a is connected to the traction rope 82, and the other end of the traction rope 82 is connected to the first air bag lifting lug 71b. When the laying device 4 moves along the second direction, the first air bag assembly 6a is pulled down from the frame 41 by the traction rope 82 and laid in the single pile 1. After the first air bag assembly 6a is laid, the traction rope 82 is disconnected from the air bag assembly 6.

[0108] Referring to Figure 15 , the laying device further comprises an air compressor arranged on the frame 41 to inflate the air bag assembly 6. After the first air bag assembly 6a is laid, the first air bag assembly 6a is inflated, and the end of the hanging rope 81 on the second air bag lifting lug 72a is connected to the first air bag assembly 6a.

[0109] Referring to Figure 16 , when the laying device 4 continues to move along the second direction, one end of the traction rope 82 is connected to the second air bag lifting lug 72b, and the other end is connected to the end of the second air bag assembly 6b to be laid. Similarly, when the laying device 4 moves along the second direction, the second air bag assembly 6b is pulled down from the frame 41 by the traction rope 82 and laid in the single pile 1.

[0110] Referring to Figure 9 and Figure 11As shown, the frame 41 is provided with a plurality of frame hangers 413. For example, the frame hanger positions 413 include a frame hanger 413a located at the top of the frame 41, and frame hangers 413b and 413c located on the side of the frame 41, see [reference]. Figure 11 The frame lifting lugs 413b and 413c are spaced apart along the length of the frame 41. The installation device 4 is hoisted to the pile head 11 by means of hoisting.

[0111] See Figure 18 After the second airbag assembly 6b is deployed, the deployment device 4 is lifted out from the pile head end 11 by the frame lifting lug 413 on the frame 41.

[0112] See Figure 18 The deployment device 4 inflates the second airbag assembly 6b and connects the bottom end of the first airbag assembly 6a to the front end of the second airbag assembly 6b. This allows the airbag assembly 6 to be deployed within the monopile 1.

[0113] During the lifting process, the main crane 21 of the floating crane vessel 2 is fixed to the pile head end 11, and the auxiliary crane 22 is fixed to the pile tail end 12. After lifting, the single pile 1 is moved to the water surface while maintaining an approximately horizontal posture. It is understood that the main crane 21 and the auxiliary crane 22 can also be located on the same floating crane vessel 2, or they can be located on two separate floating crane vessels 2.

[0114] During the process of turning over and entering the water, such as Figure 2 As shown, Figure 2 The process of the monopile 1 gradually changing from a horizontal to a vertical position and gradually entering the water is demonstrated. After the lifting points of the main crane 21 and the auxiliary crane 22 are raised to a set height above the sea level, the main crane 21 remains stationary while the auxiliary crane 22 is gradually lowered, causing the tail end 12 of the pile to rotate around the head end of the pile to gradually approach the water surface and gradually enter the water.

[0115] Specifically, as the monopile 1 gradually rotates from a horizontal to a vertical position, the monopile 1, carrying the airbag assembly 6, rotates and submerges into the water to a set depth, so that the airbag assembly 6 generates sufficient buoyancy on the monopile 1, and the auxiliary crane 22 continues to be lowered until the monopile 1 tends to move from a horizontal to a vertical position.

[0116] See Figure 7 , Figure 7 This diagram illustrates the force changes of monopile 1 during its submersion into the water. The weight of monopile 1 is 800t, and the lifting capacity of the main crane 21 is also 800t. The combined lifting capacity of the auxiliary crane 22 and the main crane 21 is greater than the combined weight of monopile 1 and the airbag assembly 6.

[0117] The horizontal axis represents the angle by which the airbag assembly 6 rotates from a horizontal to a vertical position as the monopile 1 rotates. Combined with... Figure 2It can be determined that the greater the angle of rotation of the airbag assembly 6, the greater the volume of the airbag assembly 6 submerged in water.

[0118] The ordinate is the force value of the single pile 1. F1 is the pulling force of the main crane 21 on the single pile 1, F2 is the pulling force of the auxiliary crane 22 on the single pile 1, and F3 is the buoyancy of the airbag assembly 6 on the single pile 1.

[0119] As shown in Figure 2 and Figure 7 , in the process of turning the single pile 1 into the water, the single pile 1 drives the airbag assembly 6 to rotate and gradually submerges in water. As the angle of rotation of the airbag assembly 6 increases, the depth and volume of the airbag assembly 6 submerged in water also gradually increase, so that the single pile 1 is subjected to gradually increasing upward buoyancy F3 under the action of the airbag assembly 6.

[0120] At the same time, the main crane 21 and the auxiliary crane 22 exert pulling forces F1 and F2 on the single pile 1. As the angle of rotation of the airbag assembly 6 increases, the buoyancy F3 of the single pile 1 is greater, so that the buoyancy F3 gradually replaces the pulling force F2 of the auxiliary crane 22 on the single pile 1.

[0121] When the single pile 1 is rotated to the vertical posture, the auxiliary crane 22 hardly exerts pulling force on the single pile 1, and the buoyancy F3 of the airbag assembly 6 on the single pile 1 can replace the pulling force F2 of the auxiliary crane 22 on the single pile 1, so that the main crane 21 with a lifting weight smaller than the single pile 1 can lift a single pile 1 with a weight much greater than the rated lifting weight under the action of the airbag assembly 6.

[0122] According to the installation method of the embodiment of the present application, by connecting the airbag assembly 6 to the single pile 1 when the single pile 1 is installed, the buoyancy of the airbag assembly 6 on the single pile 1 can gradually replace the pulling force of the auxiliary crane 22 on the single pile 1 in the process of the single pile 1 gradually submerging in water, so that the condition that the lifting weight of the main crane 21 does not meet the lifting of the large-weight single pile 1 is prevented, and the main crane 21 with a small lifting weight can be used to install a single pile 1 with a weight greater than the rated lifting weight, thereby significantly reducing the installation cost of the large-weight single pile 1 and improving the convenience and economy of the installation of the large-weight single pile 1.

[0123] In some embodiments of the present application, a lifting assembly is also provided, which is described with reference to Figure 25 and Figure 40 The lifting assembly in the embodiment is used to lift the single pile 1, and the single pile 1 includes a pile head end 11 and a pile tail end 12. The pile head end 11 refers to the end of the single pile 1 that is closer to the top in the process of turning the single pile 1 into the vertical state.

[0124] In Figure 29 and Figure 35In some embodiments of the present application, the crane hoists the single pile 1 through a hoist assembly. The hoist assembly includes a first hook portion 56 and an adjusting assembly. For example, referring to

[0125] The single pile 1 also has an initial hoisting position A3, which can be understood with reference to the background section. The initial hoisting position A3 of each single pile 1 is different and is provided when the single pile 1 is manufactured. The single pile 1 is provided with a pile body connecting assembly at the initial hoisting position A3. For example, the pile body connecting assembly includes a first pile body lifting lug 13a and a second pile body lifting lug arranged opposite to each other along the radial direction of the single pile 1.

[0126] The first actual hoisting position A1 and the second actual hoisting position A2 are spaced apart from the initial hoisting position A3. The first actual hoisting position A1 can be closer to the center of gravity of the single pile 1, or the initial hoisting position A3 can be closer to the center of gravity of the single pile 1.

[0127] In some embodiments of the present application, the crane hoists the single pile 1 through a hoist assembly. The hoist assembly includes a first hook portion 56 and an adjusting assembly. For example, referring to Figure 25 、 Figure 26 and Figure 40 The adjusting assembly includes an adjusting rope set and a first hoisting rope 53 connected to the first hook portion 56. The adjusting rope set includes a first adjusting rope 51 and a second adjusting rope 52 extending along the axial direction of the single pile 1 in the present embodiment. The lengths of the first adjusting rope 51 and the second adjusting rope 52 are equal. The length of the first hoisting rope 53 can be greater than or less than the lengths of the first adjusting rope 51 and the second adjusting rope 52.

[0128] Specifically, as shown in Figure 27 and Figure 28 The first adjusting rope 51 includes a first rope head end 51a and a first rope tail end 51b, and the second adjusting rope 52 includes a second rope head end and a second rope tail end 52b arranged opposite to each other.

[0129] In Figure 26 and Figure 28 The first rope head end 51a is connected to the first pile body lifting lug 13a, and the second rope head end is connected to the second pile body lifting lug. For example, in Figure 26 After the first adjusting rope 51 and the second adjusting rope 52 are hoisted using the auxiliary crane 561, the first rope head end 51a and the second rope head end are connected to the first pile body lifting lug 13a and the second pile body lifting lug, respectively.

[0130] The first lifting rope 53 is arranged along the circumference of the single pile 1, and then passes through the first rope tail end 51b and the second rope tail end 52b to be connected with the first adjusting rope 51 and the second adjusting rope 52. Figure 29 In the present embodiment, the first adjusting rope 51 and the second adjusting rope 52 extend to the first actual lifting position A1 to form a cross with the first lifting rope 53, and the position where the first adjusting rope 51, the second adjusting rope 52 and the first lifting rope 53 are cross-connected is located at the first actual lifting position A1.

[0131] When the single pile 1 is in a horizontal state, the first hook portion 56 can apply a vertical upward lifting force to the single pile 1 through the first lifting rope 53 arranged along the circumference of the single pile 1, and thus the first actual lifting position A1 of the first lifting rope 53 is the position where the first hook portion 56 actually applies the lifting force to the single pile 1.

[0132] When the single pile 1 is in the process of turning over, in combination with the contents shown in Figure 30 and Figure 26 , the direction of the gravity P of the single pile 1 is always vertically downward, and as the single pile 1 is in the process of turning over, the angle α between the extension direction of the axis L1 of the single pile 1 and the gravity P of the single pile 1 gradually decreases until α = 0°, at which time the single pile 1 is in a vertical state.

[0133] In the process of turning over, the first adjusting rope 51 and the second adjusting rope 52 apply a pulling force to the first lifting rope 53 in the axial direction through the first pile body lifting lug 13a and the second pile body lifting lug, and the position where the first adjusting rope 51 and the second adjusting rope 52 apply the pulling force to the first lifting rope 53 is located at the position where the first adjusting rope 51 and the second adjusting rope 52 are cross-connected with the first lifting rope 53, and since the position where the first rope tail end 51b and the second rope tail end 52b are cross-connected with the first lifting rope 53 is located at the first actual lifting position A1, the first hook portion 56 still applies the pulling force to the single pile 1 through the first actual lifting position A1.

[0134] Therefore, it can be seen that the first hook portion 56 applies the lifting force to the single pile 1 through the first actual lifting position A1 in the process of lifting the single pile 1 and in the process of turning over the single pile 1, rather than through the initial lifting position A3 of the single pile 1, and thus the technical solution in the present application transfers the lifting position of the single pile 1 from the initial lifting position A3 to the first actual lifting position A1 through the first adjusting rope 51, the second adjusting rope 52 and the first lifting rope 53, so that the crane can lift the single piles 1 with different initial lifting positions A3 through cooperation with the lifting assembly, thereby increasing the adaptability of the crane.

[0135] In an embodiment, referring to Figure 29 and Figure 30The lifting device also includes a tensioning device, which can be a winch or a hand chain hoist, etc.

[0136] The following explanation uses a winch as an example. One end of the winch's connecting wire rope 31a is fixed to the single pile 1, and the other end is connected to the first rope tail end 51b and the second rope tail end 52b. The connecting wire rope 31a can then be wound up to pull the first adjusting rope 51 and the second adjusting rope 52 to the first actual lifting position A1. This allows the first lifting rope 53 to easily connect with the first rope tail end 51b and the second rope tail end 52b at the first actual lifting position A1.

[0137] In a specific example, combined Figures 25-31 The specific process of setting up the first hook 56 of the lifting device assembly and the adjustment assembly is explained.

[0138] See Figure 25 , Figure 40 During the process of deploying the lifting equipment assembly on a single pile, the first hook 56 and the first lifting rope 53 are hoisted to the preset position of the lifting equipment assembly.

[0139] See Figure 26 After the auxiliary crane 561 lifts the first adjusting rope 51 and the second adjusting rope 52, the first rope end 51a is connected to the first pile lifting lug 13a, and the second rope end is connected to the second pile lifting lug.

[0140] For example, Figure 25 The first hook 56 includes a hook body and a lifting beam 58. The lifting beam 58 includes a beam head end 58a and a beam tail end 58b. One end of the first lifting rope 53 is connected to the beam head end 58a, and the other end of the first lifting rope 53 is connected to the beam tail end 58b.

[0141] like Figure 27 and Figure 28 As shown, one end of the first lifting rope 53 is first connected to the first end 58a of the lifting beam 58, and the other end passes through the first rope tail end 51b and the second rope tail end 52b in sequence, and then passes around the single pile 1 and connects to the beam tail end 58b of the lifting beam 58.

[0142] See Figure 29 The first adjusting rope 51 and the second adjusting rope 52 are pulled using a winch until they reach the first actual lifting position A1. Figure 30 and Figure 31 As shown, the first hook 56 applies a lifting force in the vertical direction to straighten the first lifting rope 53 in the vertical direction to lift the single pile 1.

[0143] In one example, see Figure 25A first wire rope 59a and a second wire rope 59b are connected to the first end 58a and the last end 58b of the lifting beam 58, respectively. Shackles are connected to the first wire rope 59a and the second wire rope 59b, and both ends of the first lifting rope 53 are connected to the shackles. Alternatively, for ease of connection, the first wire rope 59a and the second wire rope 59b are not provided, and both ends of the first lifting rope 53 are directly connected to both ends of the lifting beam 58.

[0144] In some embodiments, a second hook 57 and a second lifting rope 55 for connecting and cooperating with the second hook 57 are provided at the second actual lifting position A2 of the monopile 1. Both ends of the second lifting rope 55 are connected to the second hook 57 to form a closed loop, and the looped second lifting rope 55 is sleeved at the second actual lifting position A2 of the monopile 1. The second hook 57 applies a lifting force at the second actual lifting position A2 through the second lifting rope 55.

[0145] In order to ensure that the force on the single pile 1 is more even during the lifting process, the second actual lifting position A2 can change according to the change of the first actual lifting position A1. The first actual lifting position A1 and the second actual lifting position A2 are symmetrically set with respect to the center of gravity of the single pile 1.

[0146] In this manner, when the first hook 56 and the second hook 57 are used to horizontally lift and move the single pile 1, the positions where the first hook 56 and the second hook 57 apply the lifting force are symmetrically set with respect to the center of gravity. This balances the distribution of the lifting force between the first hook 56 and the second hook 57, and avoids the situation where the lifting force distribution between the first hook 56 and the second hook 57 is unbalanced due to the position of applying the lifting force being eccentric.

[0147] For example, see Figure 33 The lifting device assembly also includes a third adjusting rope 54, one end of which is connected to the second hook 57, and the other end of which is provided with a hook 54a for hooking the end 12 of the pile.

[0148] Therefore, during the turning process of single pile 1, the lifting force is applied to the tail end 12 of the pile through the hook 54a, thereby ensuring that the lifting force applied to single pile 1 by the second hook 57 during the turning process is evenly distributed with the lifting force of the first hook 56.

[0149] The following is combined Figures 32-40 Describe the way the second hook 57 is connected to the single pile 1.

[0150] like Figure 32 As shown, both ends of the second lifting rope 55 are connected to the second hook 57 via shackles, and one end of the third adjusting rope 54 is also connected to the second hook 57 via shackles. The end of the third adjusting rope 54 with the hook 54a is in a free state.

[0151] SeeFigure 33 , the second hook part 57 is lowered, the hook part 54a is hooked to the pile tail end 12 of the single pile 1, and then, as shown in Figure 34 , the second hook part 57 is continuously lowered and the annular second lifting rope 55 is sleeved on the outside of the single pile 1. Referring to Figure 35 , the second lifting rope 55 moves along the axial direction of the single pile 1 under the action of the second hook part 57 and pulls the third adjusting rope 54 to the second actual lifting position A2. The length of the third adjusting rope 54 can be selected according to the distance between the second actual lifting position A2 and the pile tail end 12. Then, the second hook part 57 is raised in the vertical direction, the second lifting rope 55 is pulled straight, and the lifting force is applied to the second actual lifting position A2 through the second lifting rope 55.

[0152] Under the joint action of the first hook part 56 and the second hook part 57, the single pile 1 in the horizontally placed state can be lifted and moved. When moved to the set pile lowering site, in combination with Figure 26 , compared with Figure 36 , Figure 37 , Figure 38 and Figure 39 , in the process of pile turning, the second hook part 57 is gradually lowered, at this time, the second hook part 57 applies the lifting force to the single pile 1 through the second lifting rope 55 and the third adjusting rope 54, and the first hook part 56 remains stationary. With the lowering of the second hook part 57, the single pile 1 rotates to the vertical state around the first actual lifting position A1 under the action of gravity. After the single pile 1 is in the vertical position, the second lifting rope 55 and the third adjusting rope 54 are removed from the single pile 1.

[0153] In some embodiments, the air bag assembly 6 is connected to the single pile 1 in the uninflated state, and the air bag assembly 6 is inflated before lifting.

[0154] For example, referring to Figures 3-6 , after the air bag assembly 6 is connected to at least one of the inner wall and the outer wall of the single pile 1, the air compressor inflates the air bag assembly 6. The air compressor is, for example, a negative pressure pump, and the type of air compressor is not limited herein, as long as it can inflate the air bag assembly 6. The air compressor (not shown in the figure) is connected to the air bag assembly 6 through an air pipe, and can be placed on the floating crane ship 2 without being submerged with the single pile 1.

[0155] Alternatively, since the transport ship 5 transports the single pile 1 to the construction site in a horizontal manner, it is difficult to install the air bag assembly 6 on the outer wall of the single pile 1. Since the single pile 1 in the embodiment is in a cylindrical structure, the air bag assembly 6 is installed on the inner wall of the single pile 1 in the embodiment.

[0156] Specifically, the airbag assembly 6 is detachably connected to the inner wall of the monopile 1. Compared to other types of buoyancy-generating devices, such as foam, the airbag assembly 6 has a smaller volume when not inflated, making its arrangement more convenient.

[0157] The specific way to arrange the airbag assembly 6 is that the installer carries a traction winch to place the airbag assembly 6 inside the single pile 1, and starts to inflate it after the airbag assembly 6 is pulled flat.

[0158] In one example, the inflated airbag assembly 6 is 5m-10m away from the end face of the single pile 1, thereby avoiding interference with the single pile 1 during the subsequent process of driving the single pile 1 into the mud.

[0159] In one example, such as Figure 8 As shown, three airbag assemblies 6 are arranged radially within a single pile 1. The three airbag assemblies 6 are evenly distributed radially along the single pile 1 when inflated. Specifically, the three airbag assemblies 6 are a first airbag 61, a second airbag 62, and a third airbag 63. When these three airbag assemblies 6 are arranged, the single pile 1 is in a horizontal position, with the first airbag 61 positioned at the lower radial position of the single pile 1, and the second and third airbags 62 and 63 positioned at the upper radial position of the single pile 1, at least partially compressing the first airbag 61.

[0160] During inflation, the first airbag 61 located at the bottom is first inflated to half full, then the second airbag 62 and the third airbag 63 located above the first airbag 61 are inflated to half full, and finally, the three airbag components 6 are inflated to full full in sequence.

[0161] The arrangement of the airbag assembly 6 and the inflation method can prevent the airbag assembly 6 from moving relative to each other during inflation, thereby ensuring that the inflated airbag assembly 6 can be evenly distributed radially in the single pile 1, thus ensuring the uniformity of the force on the single pile 1 after it enters the water, and thus improving the controllability of the attitude of the single pile 1 when it enters the mud.

[0162] In some embodiments, see Figure 3 Before the mud-filling step, the process also includes pile feeding: the single pile 1 is placed in the pile holding frame 3 by the main crane 21.

[0163] Since the monopile 1 is partially submerged after being placed in the water, and the forces applied to the monopile 1 by the main crane 21 and the airbag assembly 6 are all in its axial direction, the monopile 1 is not constrained radially, making it susceptible to displacement due to water flow. By placing the monopile 1 into the pile clamp 3, it is radially restrained to prevent displacement when the monopile 1 enters the mud. Thus, the interaction between the pile clamp 3 and the main crane 21 reduces the displacement of the monopile 1's posture in the water.

[0164] Optionally, see Figure 4 The feeding process also includes lateral pulling of the single pile 1 along the radial direction of the single pile 1 when the single pile 1 is about to enter the pile holding frame 3.

[0165] Specifically, just before feeding the pile, the staff can pull the single pile 1 laterally at a pre-set traction point to limit the position of the single pile 1 before feeding it.

[0166] In some embodiments, the step of driving the single pile 1 into the mud includes driving it into the mud by its own weight: by controlling the pulling force of the main crane 21 on the single pile 1, the single pile 1 is driven into the mud by its own weight.

[0167] Specifically, after the single pile 1 is aligned, the pulling force of the main crane 21 on the single pile 1 is gradually reduced, so that the single pile 1 gradually sinks and enters the mud by its own weight.

[0168] In this embodiment, during the process of sinking into the mud by its own weight, the air pressure of the airbag assembly 6 is monitored, and when the air pressure of the airbag assembly 6 is less than a set threshold, the airbag assembly 6 is inflated.

[0169] Specifically, a control device and a sensing device are provided, wherein the sensing device can be a pressure sensor, which can be integrated into the end of each airbag. The control device and the sensing device are connected to the air compressor. Based on the air pressure of the airbag assembly 6 sensed by the sensing device, or based on the range of tension applied to the monopile 1 by the main crane 21 detected by the sensing device, the control device sends an open or closed signal to the air compressor, so that the air compressor inflates the airbag assembly 6. The air compressor and each airbag of the airbag assembly 6 are connected by an air pipe. The air pipe, as well as other wires and control lines located in the monopile 1, extend from the head end 11 of the monopile 1, or a through hole is opened on the side of the monopile 1, through which the air pipe, wires, and control lines extend from the monopile 1. Optionally, the air pipe, wires, and control lines are fitted with limiting members to integrate the air pipe, wires, and control lines into a single line, thereby avoiding interference between the lines.

[0170] During the driving of monopile 1 into the mud, as the depth of the airbag assembly 6 submerged in the water gradually increases, the pressure on the airbag assembly 6 gradually increases, causing its volume to decrease. This, in turn, affects the buoyancy exerted by the airbag assembly 6 on monopile 1. By adjusting the air pressure inside the airbag assembly 6, it is inflated when the air pressure is lower than the safe air pressure. This ensures that the air pressure inside the airbag assembly 6 is always controlled within the range required for the buoyancy of monopile 1.

[0171] In one example, see Figure 5 The mud-filling step also includes detaching the airbag assembly 6 from the single pile 1 before it is filled into the mud; see [link to relevant documentation]. Figure 6After the airbag assembly 6 detaches from the single pile 1, the main crane 21 controls the single pile 1 to complete the mud-penetration construction.

[0172] Optionally, when the airbag assembly 6 is detached from the monopile 1, the airbag assembly 6 is simultaneously hooked to the auxiliary crane 22. After the airbag assembly 6 is detached from the monopile 1, the auxiliary crane 22 lifts the airbag assembly 6 out of the monopile 1.

[0173] Specifically, after the step of turning over and entering the water, the construction of single pile 1 into the mud is carried out. During this process, it is necessary to avoid the airbag assembly 6 from entering the mud, so as to prevent the buoyancy generated by the airbag assembly 6 from affecting the mud entry of single pile 1. Therefore, the airbag assembly 6 is removed from single pile 1 before it contacts the mud on the seabed.

[0174] In one embodiment, the airbag assembly 6 is deflated before it detaches from the monopile 1.

[0175] The airbag assembly 6 is gradually deflated to reduce its buoyancy. This avoids the buoyancy of the airbag assembly 6 hindering the mud-penetration process and reduces the difficulty of detaching the airbag assembly 6 from the monopile 1.

[0176] Specifically, as the airbag assembly 6 is about to contact the seabed mud, it is gradually deflated. During the deflation process, if the gas inside the airbag assembly 6 cannot be expelled smoothly, the airbag assembly 6 can be evacuated. When the airbag assembly 6 can no longer remain suspended in the water, it is detached from the monopile 1. At this point, the main crane 21, within its lifting capacity, controls the monopile 1 to continue sinking into the mud under its own weight. After the monopile 1 has finished sinking into the mud under its own weight, the main crane 21 separates from the monopile 1 and lifts the deflated airbag assembly 6 out of the monopile 1.

[0177] like Figure 5 As shown, when two layers of airbag assemblies 6 are installed axially on the monopile 1, the lower layer of airbag assembly 6 can be deflated first, allowing the upper layer of airbag assembly 6 to continue generating buoyancy. As the depth of the monopile 1 into the mud increases, the upper layer of airbag assembly 6 is deflated.

[0178] This avoids the situation where the buoyancy generated by the airbag assembly 6 reduces the weight of the single pile 1, resulting in shallow penetration into the mud, while also maintaining a certain buoyancy of the airbag assembly 6 on the single pile 1.

[0179] The specific construction of the monopile assembly is described below.

[0180] According to one embodiment of this application, reference is made to... Figure 19 The monopile assembly described in this embodiment includes a monopile 1, a connecting assembly 9, and an airbag assembly 6.

[0181] Specifically, such asFigure 19 As shown, the airbag assembly 6 is detachably connected to the inner wall of the monopile 1 via the connecting assembly 9.

[0182] During the installation of the offshore wind turbine monopile 1, after the airbag assembly 6 is connected to the inner wall of the monopile 1, the monopile 1 is lowered into the water. As the monopile 1 is gradually lowered into the water, the airbag assembly 6 provides buoyancy to the monopile 1, reducing the lifting weight requirement of the floating crane used to lift the monopile 1. After the monopile 1 is driven into the mud at the designated position, the airbag assembly 6 is separated from the monopile 1, and the airbag assembly 6 is lifted out of the monopile 1 and retrieved using the hoisting rope 84.

[0183] By using the embodiments of the present invention, by setting an airbag assembly 6 that can be detachably connected to the monopile 1 to provide buoyancy for the monopile 1, the lifting weight requirement of the floating crane for lifting the monopile 1 can be effectively reduced, so that even when the lifting weight of the main crane is less than the weight of the monopile 1, a heavier monopile 1 can still be lifted, thereby effectively reducing the installation cost of the monopile 1 of the offshore wind turbine.

[0184] In one specific embodiment, see Figure 19 The connecting assembly 9 includes at least one set of airbag suspension parts 7 and a hanging rope 81. The airbag suspension parts 7 are used to suspend the airbag assembly 6. Each set of airbag suspension parts 7 includes at least a first airbag lug 71a and a second airbag lug 72a arranged along the axial direction of the monopile 1; the first airbag lug 71a and the second airbag lug 72a are fixed to the inner wall of the monopile 1. See also... Figures 19-21 The first airbag lifting lug 71a is closer to the pile head end 11 than the second airbag lifting lug 72a. The pile head end 11 is the end of the single pile 1 located on the upper side in the vertical direction during pile driving. It can be a single set of airbag suspension parts 7, or multiple sets of airbag suspension parts 7, arranged circumferentially around the inner wall of the single pile 1. The number of airbag suspension parts 7 is related to the fixing of the airbag assembly 6 and the magnitude of the buoyancy force on the airbag assembly 6; those skilled in the art can determine the number of airbag suspension parts 7 themselves.

[0185] It is understood that the position of the airbag within the monopile 1 is limited by controlling the axial height of the airbag suspension part 7 within the monopile 1. The position of the airbag suspension part 7 within the monopile 1 is different for each monopile 1, and those skilled in the art can determine the position of the airbag suspension part 7 within the monopile by using the center of gravity and mass of the monopile 1.

[0186] In one example, the airbag assembly 6 includes at least one airbag group, each airbag group including at least one airbag, and when each airbag group includes multiple airbags, the multiple airbags are arranged side by side along the circumference of the monopile 1. For example, the airbag assembly 6 includes a first airbag group 6a and a second airbag group 6b, which are distributed axially on the monopile 1. Axially on the monopile 1, the first airbag group 6a is located above the second airbag group 6b. The first airbag group 6a is closer to the pile head 11.

[0187] It is understandable that only the first airbag group 6a can be set. However, when the second airbag group 6b is set, the second airbag group 6b can effectively increase the buoyancy applied to the single pile 1 by the airbag assembly 6. At the same time, during the construction process when the single pile 1 is partially embedded in the mud, the second airbag group 6b can be deflated to prevent it from entering the mud. At this time, the first airbag group 6a effectively supplements the buoyancy of the second airbag group 6b, avoiding the situation where only one airbag group is set. During the process of the single pile 1 being partially embedded in the mud, the buoyancy decreases after the only airbag group is deflated, and the airbag assembly 6 cannot provide the required buoyancy for the single pile 1. For example, the first airbag group 6a includes at least one airbag, and the second airbag group 6b includes at least one airbag. For example, both the first airbag group 6a and the second airbag group 6b include three, four, or six airbags. The specific number is set according to the requirements, and this embodiment does not impose any restrictions.

[0188] Each airbag is connected to at least one set of airbag suspension parts 7 via a hanging rope 81; alternatively, each airbag may be connected to two or three sets of airbag suspension parts 7. For example, one set of airbag suspension parts 7 includes a first airbag lug 71a and a second airbag lug 72a, and another set of airbag suspension parts 7 includes a first airbag lug 71b and a second airbag lug 72b.

[0189] In one example, to simplify the structure of the single-pile airbag mounting, the first airbag assembly 6a is connected to the airbag suspension part 7 via a hanging rope 81. The connecting assembly 9 also includes a connecting rope 83, one end of which is connected to the bottom end of the airbag of the first airbag assembly 6a, and the other end of which is connected to the top end of the airbag of the second airbag assembly 6b.

[0190] Specifically, see Figures 19-21 The second airbag group 6b, located below the first airbag group 6a, is not connected to the inner wall of the single pile 1. Only the top of each airbag in the second airbag group 6b is connected to the bottom of each airbag in the first airbag group 6a via a connecting rope 83.

[0191] During the process of single pile 1 being submerged in water, the first airbag assembly 6a is connected to the inner wall of single pile 1 via the first airbag lifting lug 71a and the second airbag lifting lug 72a. The first airbag lifting lug 71a and the second airbag lifting lug 72a limit the first airbag assembly 6a in the axial direction, preventing the first airbag assembly 6a from moving in the axial direction of single pile 1. When the second airbag assembly 6b is submerged in water, under the action of seawater, the second airbag assembly 6b experiences an upward buoyancy force in the axial direction of single pile 1. At this time, the second airbag assembly 6b will move upward in the axial direction. However, because the first airbag assembly 6a is limited in the axial direction by the first airbag lifting lug 71a and the second airbag lifting lug 72a, the second airbag assembly 6b can no longer move upward in the axial direction of single pile 1 due to the stop of the first airbag assembly 6a. Furthermore, since the first airbag assembly 6a and the second airbag assembly 6b are connected by a connecting rope 83, during the process of the single pile 1 entering the water, the airbag suspension part 7 hangs the second airbag assembly 6b on the inner wall of the single pile 1 through the first airbag assembly 6a, thereby preventing the second airbag assembly 6b from coming out of the single pile 1 before it enters the water.

[0192] It is understandable that multiple airbag suspension parts 7 can be arranged axially, with the upper airbag suspension part 7 used to hang the first airbag group 6a and the lower airbag suspension part 7 used to hang the second airbag group 6b. However, it is clear that this installation method in this embodiment makes the structure of the connecting component 9 simpler.

[0193] In some embodiments, at least one of the first airbag lug 71a and the second airbag lug 72a is a double-ear plate structure; it may be that both the first airbag lug 71a and the second airbag lug 72a are double-ear plate structures, or the second airbag lug 72a is a double-ear plate structure and the first airbag lug 71a is a single-ear plate structure, or the first airbag lug 71a is a double-ear plate structure and the second airbag lug 72a is a single-ear plate structure.

[0194] To achieve a detachable connection between the airbag assembly 6 and the monopile 1, we can manually disassemble the airbag assembly 6 from the monopile 1, or we can automatically remove the airbag from the monopile 1.

[0195] Specifically, when manually detaching the airbag from the monopile 1, the airbag can be detached by manually cutting the hanging rope 81. See also Figure 23 and Figure 24In this embodiment, the first airbag lifting lug 71a is a double-ear plate structure, which includes a first ear plate 711, a second ear plate 712, and a pin 713. The first ear plate 711 and the second ear plate 712 are arranged opposite each other parallel to the central axis of the single pile 1. Through holes are provided on the first ear plate 711 and the second ear plate 712, and the pin 713 can be inserted into the through holes. One end of the pin 713 is provided with a limiting boss 716, and the other end of the pin 713 is provided with a limiting through groove 714. When the pin 713 passes through the first ear plate 711 and the second ear plate 712 from the outside of the first ear plate 711, the limiting boss 716 of the pin 713 forms a stop with the outer wall of the first ear plate 711, and the limiting through groove 714 of the pin 713 is located on the outside of the second ear plate 712. A limiting pin is inserted into the limiting slot 714 so that the other end of the pin shaft 713 is engaged with the outer wall of the second ear plate 712. Thus, by inserting the pin shaft 713 into the first ear plate 711 and the second ear plate 712, the lifting lug is locked, and one end of the hanging rope 81 is connected to the pin shaft 713. When it is necessary to separate the airbag from the monopile 1 body, the limiting pin is manually pulled out, and the pin shaft 713 is pulled out from the first ear plate 711 and the second ear plate 712 to remove the hanging rope 81 from the pin shaft 713. Furthermore, compared to the single-ear plate structure, the double-ear plate structure of the airbag lifting lug reduces friction between the airbag lifting lug and the hanging rope 81.

[0196] When the airbag is detached from the single pile 1 using automatic control, see [link to relevant documentation]. Figure 21 The connecting assembly 9 also includes an automatic release device 91, which is disposed at at least one end of the hanging rope 81. Figure 21 In the middle, the automatic unhooking device 91 is set at both ends of the hanging rope 81, or it can be in the middle. Figure 19 An automatic unhooking device 91 is installed at the location indicated by arrow A in the middle. That is, the automatic unhooking device 91 is installed at the end where the hanging rope 81 is connected to the first airbag lifting lug 71a.

[0197] See Figure 21 and Figure 22 The automatic unhooking device 91 includes a main body 911, a connecting part 912, a locking pin 913, and a drive part 914. The main body 911 has a locking hole. The connecting part 912 is located on the main body 911, and the end of the hanging rope 81 is connected to the connecting part 912. The drive part 914 is located on the main body 911 and is connected to the locking pin 913. The drive part 914 can drive the locking pin 913 to move and engage with the locking hole to form a lock or unlock. The drive part 914 can be hydraulically driven or electrically driven; the specific driving method is not limited here, as long as it can drive the locking pin 913 to move relative to the main body 911.

[0198] For example, seeFigure 21 In the example where the automatic unhooking device 91 is only installed at the end where the hanging rope 81 is connected to the first airbag lifting lug 71a, the first airbag lifting lug 71a is a single lug structure. A single lug structure refers to a lifting lug that includes only one lug. For example, the first airbag lifting lug 71a includes a third lug 715, which is fixed to the inner wall of the single pile 1 and has a through hole. The main body 911 of the automatic unhooking device 91 includes two clamping arms, namely clamping arm 915a and clamping arm 915b, which are located on both sides of the third ear plate 715. Both clamping arms 915a and clamping arm 915b have locking holes. Under the drive of the drive unit 914, the locking pin 913 passes through the clamping arms 915a and clamping arm 915b and the third ear plate 715 in sequence, thereby connecting the automatic unhooking device 91 to the third ear plate 715 to hang the airbag assembly 6 on the inner wall of the monopile 1. When it is necessary to remove the airbag assembly 6 from the monopile 1, the drive unit 914 drives the locking pin 913 to retract to unlock.

[0199] In some embodiments, see Figures 19-21 To prevent damage to the airbag end when the end of the hanging rope 81 is directly connected to the end of the airbag, the connecting assembly 9 also includes a hanging net 92. The hanging net 92 is sleeved on the outside of the airbag and includes a first net opening 921 and a second net opening 922. The first net opening 921 and the second net opening 922 are respectively opposite to the bottom and top of the airbag. The hanging net 92 at least covers the bottom of the airbag, and the end of the hanging rope 81 is connected to the second net opening 922.

[0200] Because the bottom of the airbag experiences significant buoyancy, directly connecting the hanging rope 81 to the bottom of the airbag could easily damage it, reducing its reliability. By wrapping the bottom of the airbag with a net 92 and connecting the end of the hanging rope 81 to the second net opening 922 via a shackle, the hanging rope 81 is indirectly connected to the airbag, thus preventing damage to the bottom of the airbag.

[0201] Optionally, when a first airbag assembly 6a and a second airbag assembly 6b are provided, at least each airbag in the first airbag assembly 6a is covered with a hanging net 92. This increases the reliability of the first airbag assembly 6a.

[0202] The following describes a specific embodiment of the single-pile 1-mounted airbag suspension unit 7.

[0203] Example 1

[0204] See Figure 19 and Figure 20 The following explanation will be based on one of the airbags in the first airbag group 6a.

[0205] One end of the hanging rope 81 is connected to the first airbag lifting lug 71a, and the other end of the hanging rope 81 passes through the second airbag lifting lug 72a and is connected to the bottom of the airbag. One end of the hanging rope 81 is connected to the first airbag lifting lug 71a via a shackle. The other end of the hanging rope 81 is connected to the bottom of the airbag, either directly to the bottom of the airbag or indirectly to the airbag through the second opening of the hanging net 92.

[0206] When it is necessary to remove the airbag from the single stake 1, the hanging rope 81 can be cut manually; or, in this embodiment, the first airbag lifting lug 71a has a double-ear plate structure, and the hanging rope 81 can be separated from the first airbag lifting lug 71a by manually pulling out the pin 713 of the double-ear plate structure; or, one end of the hanging rope 81 can be connected to the first airbag lifting lug 71a through an automatic unhooking device 91, wherein the automatic unhooking device 91 is located at... Figure 19 and Figure 20 At the location indicated by arrow A, the first airbag lifting lug 71a has a single-ear plate structure. When the airbag needs to be removed from the single stake 1, the automatic unhooking device 91 is unlocked from the first airbag lifting lug 71a by means of electronic control, thereby separating the hanging rope 81 from the first airbag lifting lug 71a.

[0207] Example 2

[0208] The difference between this embodiment and Embodiment 1 is that one end of the hanging rope 81 is connected to the top of the airbag, the other end of the hanging rope 81 is connected to the bottom of the airbag, and the middle part of the hanging rope 81 is passed through the first airbag lug 71a and the second airbag lug 72a.

[0209] like Figure 21 As shown, both the first airbag lug 71a and the second airbag lug 72a are double-ear plate structures used to turn the hanging rope 81, thereby reducing the friction between the hanging rope 81 and the airbag lug.

[0210] In this embodiment, the hanging net 92 covers the top and bottom of the airbag, one end of the hanging rope 81 is connected to the first net opening 921 of the hanging net 92 by a shackle, and the other end of the hanging rope 81 is connected to the second net opening 922 of the hanging net 92 by a shackle.

[0211] Optionally, see Figure 21 An automatic release device 91 is provided at the end of the hanging rope 81. This device can be provided at both ends of the hanging rope 81, or at one end. Providing automatic release devices 91 at both ends of the hanging rope 81 prevents the possibility of one device 91 malfunctioning. When the hanging rope 81 is equipped with an automatic release device 91, the locking pin 913 of the automatic release device 91 connects the main body 911 to the shackle connected to the first mesh opening 921.

[0212] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An installation device for an offshore wind power system, characterized in that, include: A monopile assembly for supporting the offshore wind power device, the monopile assembly comprising a monopile and an airbag assembly, the airbag assembly being connected to the monopile; The single pile also has an initial lifting position, a first actual lifting position on the side near the pile head, and a second actual lifting position on the side near the pile tail; the initial lifting position is provided with a first pile body lifting lug and a second pile body lifting lug arranged radially opposite to each other along the single pile. The installation equipment includes a main crane and an auxiliary crane. The main crane is used to connect to the head end of the single pile, and the auxiliary crane is used to connect to the tail end of the single pile. It also includes a lifting device assembly, through which the crane lifts the monopile. The lifting device assembly includes a first hook and an adjustment assembly. The adjustment assembly includes an adjustment rope group and a first lifting rope. The first lifting rope is connected to the first hook. The adjustment rope group includes a first adjustment rope and a second adjustment rope extending along the axial direction of the monopile. The first adjusting rope includes a first rope head end and a first rope tail end, and the second adjusting rope includes a second rope head end and a second rope tail end that are disposed opposite to each other. The first rope head end is connected to the first pile lifting lug, and the second rope head end is connected to the second pile lifting lug. The first adjusting rope and the second adjusting rope extend to the first actual lifting position to intersect with the first lifting rope; A second hook and a second lifting rope are provided at the second actual lifting position of the single pile. Both ends of the second lifting rope are connected to the second hook to form a closed loop. The looped second lifting rope is fitted at the second actual lifting position of the single pile. Both ends of the second lifting rope are connected to the second hook through shackles. The lifting device assembly also includes a third adjusting rope, one end of which is connected to the second hook, and the other end of which is provided with a hook to hook the tail end of the pile.

2. The installation equipment according to claim 1, characterized in that, It also includes a pile clamping frame, which is installed at the pile lowering working position.

3. An installation method, based on the installation equipment according to claim 1 or 2, characterized in that, The installation method includes: Lifting: The main crane and the auxiliary crane lift the single pile to the set height; Turning over and entering the water: The main crane remains stationary, while the auxiliary crane lowers the tail end of the pile so that the tail end of the pile rotates around the head end of the pile and gradually submerges into the water together with the airbag assembly; Dredging into the mud: After the single pile is transformed into a vertical state, the main crane lowers the single pile to carry out the dredging into the mud construction. Pile driving construction.

4. The installation method according to claim 3, characterized in that, Also includes: Airbag deployment: The airbag assembly is connected to the monopile in an uninflated state. Before lifting, the airbag assembly is inflated.

5. The installation method according to claim 3, characterized in that, Prior to the mud-filling step, the following is also included: The pile is fed by placing the single pile into the pile holding frame using the main crane.

6. The installation method according to claim 5, characterized in that, The feeding step also includes: When a single pile is about to enter the pile clamping frame, the single pile is pulled laterally along the radial direction of the single pile.

7. The installation method according to claim 3, characterized in that, The step of driving a single pile into the mud includes: Self-weight into the mud: By controlling the pulling force of the main crane on the single pile, the single pile is made to sink into the mud by its own weight.

8. The installation method according to claim 7, characterized in that, The process of sinking into the mud by its own weight includes: The air pressure of the airbag assembly is monitored, and the airbag assembly is inflated when the air pressure of the airbag assembly is less than a set threshold.

9. The installation method according to claim 3, characterized in that, The step of adding mud also includes: Before the airbag assembly is inserted into the mud, the airbag assembly is detached from the monopile; After the airbag assembly detaches from the monopile, the main crane controls the monopile to complete the mud-penetration construction.

10. The installation method according to claim 9, characterized in that, Before detaching the airbag assembly from the monopile, deflate the airbag assembly.

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