A system and method for offshore wind turbine unit dismantling

Abstract

The application discloses an offshore wind turbine unit overall dismantling system and method, and the dismantling system comprises a hydraulic servo loading device, a stress monitoring device, a cutting device, an anti-sinking floating device and a control device, the hydraulic servo loading device, the stress monitoring device, the cutting device and / or the anti-sinking floating device are connected with the control device respectively, and the operating end of the hydraulic servo loading device, the monitoring part of the stress monitoring device, the cutting end of the cutting device and the operating part of the anti-sinking floating device are arranged in contact with a tower drum of a wind turbine unit to be dismantled. The dismantling method is completed by using the offshore wind turbine unit overall dismantling system and comprises the following steps: 1) designing parameters; 2) installing the system; 3) starting the system; 4) recycling the system; 5) cutting the tower drum which is not completely cut in step 3) again until the tower drum is completely cut; and 6) recycling the wind turbine unit which is floating in water after being dismantled. The application avoids high economic losses and makes resources fully utilized.

Description

Technical Field

[0001] This application belongs to the field of offshore wind power engineering technology, specifically relating to an overall dismantling system and method for offshore wind turbines. Background Technology

[0002] In 2007, a 1.5MW experimental offshore wind turbine was installed on an oil rig in the Bohai Bay, marking the beginning of China's offshore wind power development. In 2010, China's first offshore wind farm demonstration project was connected to the grid. In 2016, China's first commercially operated offshore wind power project was connected to the grid. Near-shore offshore wind farm resources are limited. Early-built turbines have low single-unit capacity. If offshore wind turbines reach the end of their service life or suffer irreparable failures, they will inevitably need to be dismantled and replaced with larger-capacity turbines. Currently, China is still in the construction phase of offshore wind power development, and there are no precedents for dismantling demonstration or commercially operated turbines. Conventional dismantling methods follow the reverse process of installation. If similar ship and machinery equipment are used for dismantling, the cost will be extremely high. Furthermore, the equipment costs of early-stage operational turbines are already expensive, and construction and installation costs are high. Combined with the high costs of dismantling, commercially operated turbines will be unprofitable, or even incur losses.

[0003] Therefore, we propose a system and method for the overall dismantling of offshore wind turbines in advance. Summary of the Invention

[0004] In view of the shortcomings or deficiencies of the prior art, the technical problem to be solved by this application is to provide an overall dismantling system and method for offshore wind turbines.

[0005] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0006] This application proposes an overall dismantling system for offshore wind turbines, comprising: a hydraulic servo loading device, a stress monitoring device, a cutting device, an anti-sinking floating device, and a control device. The hydraulic servo loading device, the stress monitoring device, the cutting device, and / or the anti-sinking floating device are respectively connected to the control device. The operating end of the hydraulic servo loading device, the monitoring component of the stress monitoring device, the cutting end of the cutting device, and the working component of the anti-sinking floating device are arranged in contact with the tower of the wind turbine to be dismantled.

[0007] Optionally, in the above-mentioned offshore wind turbine overall dismantling system, the anti-sinking floating device includes: a first floating operation component, a second floating operation component, and an inflatable structure, wherein the first floating operation component and the second floating operation component are respectively connected to the inflatable structure; the first floating operation component is disposed at the head of the wind turbine unit to be dismantled, and the second floating operation component is disposed inside the tower of the wind turbine unit to be dismantled.

[0008] Optionally, in the above-mentioned offshore wind turbine overall dismantling system, the first floating operation component includes: a first airbag and multiple connecting straps, the connecting straps being disposed on the first airbag; the first airbag is provided with a snap-fit ​​groove for engaging with the turbine head of the wind turbine to be dismantled, and the connecting straps connecting the first airbag and the wind turbine to be dismantled.

[0009] Optionally, in the above-mentioned offshore wind turbine overall dismantling system, the second floating operation component includes: a folding support frame and a second airbag, the second airbag being disposed on the folding support frame; the folding support frame being disposed inside the tower of the wind turbine to be dismantled.

[0010] Optionally, in the above-mentioned offshore wind turbine overall dismantling system, the folding support frame includes: a connecting ring, multiple connecting pieces, and multiple connecting plates. One end of the multiple connecting pieces is connected to the multiple connecting plates, and the other end of the multiple connecting pieces is connected to the connecting ring. The multiple connecting plates are arranged circumferentially within the tower of the wind turbine to be dismantled.

[0011] Optionally, in the above-mentioned offshore wind turbine overall dismantling system, the connecting component includes: a hook, a tensioning element, a tensioner, and a mounting plate. The tensioner is disposed on the tensioning element, one end of the tensioning element is connected to the hook, and the other end of the tensioning element is rotatably connected to the mounting plate. The mounting plate is connected to the connecting ring. And / or, the folding support frame further includes: a plurality of reinforcing ribs, the reinforcing ribs connecting adjacent connecting components.

[0012] Optionally, in the above-mentioned offshore wind turbine overall dismantling system, the hydraulic servo loading device includes: a first control unit, a first force sensor, and at least two hydraulic rods. The first force sensor is connected to the hydraulic rods, and the first control unit is electrically connected to the first force sensor and the hydraulic rods. One end of the hydraulic rod serves as the operating end and is arranged in contact with the tower of the wind turbine to be dismantled.

[0013] Optionally, in the above-mentioned offshore wind turbine overall dismantling system, the stress monitoring device includes at least: a second force sensor and a second control unit, the second force sensor being electrically connected to the second control unit, and the second force sensor being installed as the monitoring element on the remaining part of the tower of the wind turbine to be dismantled after cutting.

[0014] Optionally, in the above-mentioned offshore wind turbine overall dismantling system, the cutting device includes: a third control unit and a cutting component, the third control unit being electrically connected to the cutting component, and the cutting end of the cutting component being in contact with the tower of the wind turbine to be dismantled.

[0015] This application also proposes a method for the overall dismantling of offshore wind turbines, which uses the aforementioned overall dismantling system for offshore wind turbines to complete the following steps:

[0016] 1) Design parameters;

[0017] 2) Installation system: Install the hydraulic servo loading device, stress monitoring device and cutting device at the corresponding positions of the wind turbine unit to be dismantled, and conduct joint commissioning and testing; install the anti-sinking floating device;

[0018] 3) Start-up system: The stress monitoring device monitors stress; the cutting device cuts according to the designed cutting path; the hydraulic servo loading device supports the tower of the wind turbine unit to be dismantled during the cutting process until the cutting is completed. The hydraulic servo loading device then detaches from the tower, and the tower tilts along the upper half of the cutting line, with the end falling into the water.

[0019] 4) Recovery system: Dismantle the hydraulic servo loading device, stress monitoring device, and cutting device;

[0020] 5) Cut the tower of the wind turbine unit to be dismantled that was not completely cut in step 3) until it is completely cut.

[0021] 6) Recover the wind turbine units that are floating in the water after dismantling.

[0022] Compared with the prior art, this application has the following technical effects:

[0023] The dismantling system and the dismantled wind turbine units proposed in this application can be recycled and reused, avoiding high economic losses and promoting full utilization of resources;

[0024] The second floating operation component of this application changes the existing technology of using steel welded steel structure components for sealed sealing. It uses an inflatable structure, which has a small overall mass, low processing and manufacturing precision requirements, is easy to install, does not require a lot of welding work, can be applied to towers of different diameters, and each component has an independent function. It can be replaced individually after damage, without the need for overall scrapping, which is conducive to the full utilization of resources. Attached Figure Description

[0025] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0026] Figure 1 A partial schematic diagram of a fan unit to be dismantled, equipped with a hydraulic servo loading device, a stress monitoring device, and a cutting device, in one embodiment of this application.

[0027] Figure 2 : A schematic diagram of a wind turbine unit to be dismantled, equipped with an anti-sinking floating device, in one embodiment of this application;

[0028] Figure 3 :like Figure 2 A partial schematic diagram of the structure shown;

[0029] Figure 4 : A top view of the first airbag in one embodiment of this application;

[0030] Figure 5 : A top view of the folding support frame in application in one embodiment of this application;

[0031] Figure 6 : A schematic diagram of a connector in one embodiment of this application;

[0032] Figure 7 : A top view of the connecting plate in one embodiment of this application;

[0033] In the diagram: 1. Wind turbine unit to be dismantled, 101. Tower, 102. Head unit, 103. Base, 2. Hydraulic servo loading device, 201. Hydraulic rod, 3. Stress monitoring device, 301. Monitoring component, 4. Cutting device, 401. Anti-sinking floating device, 5. First floating operation component, 510. First airbag, 511. Clip groove, 5111. Connecting belt, 512. Second floating operation component, 520. Folding support frame, 521. Connecting ring, 5211. Connector, 5212. Hook, 5213. Tensioning component, 5214. Tensioner, 5215. Mounting plate, 5216. Pin, 5217. Bolt hole, 5218. Connecting plate, 5219. Second airbag, 522. Reinforcing rib, 523. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] like Figure 1 and Figure 2 As shown, this application proposes an overall dismantling system for offshore wind turbines, comprising: a hydraulic servo loading device 2, a stress monitoring device 3, a cutting device 4, an anti-sinking floating device 5, and a control device. The hydraulic servo loading device 2, the stress monitoring device 3, the cutting device 4, and / or the anti-sinking floating device 5 are respectively connected to the control device. The operating end of the hydraulic servo loading device 2, the monitoring component 301 of the stress monitoring device 3, the cutting end of the cutting device 4, and the working component of the anti-sinking floating device 5 are arranged in contact with the tower 101 of the wind turbine unit 1 to be dismantled.

[0036] In this embodiment, the hydraulic servo loading device 2 and the cutting device 4 are installed on the base 103 of the wind turbine unit 1 to be dismantled. The operating end of the hydraulic servo loading device 2 is in contact with the tower 101 of the wind turbine unit 1 to be dismantled to provide support during the cutting process of the cutting device 4. The monitoring element 301 of the stress monitoring device 3 is set on the tower 101 of the wind turbine unit 1 to be dismantled and is positioned close to the base 103 for easy recovery. The working part of the anti-sinking floating device 5 is installed on the tower 101 of the wind turbine unit 1 to be dismantled. The control device is electrically connected to the hydraulic servo loading device 2, stress monitoring device 3, cutting device 4, and anti-sinking floating device 5. The stress monitoring device 3 continuously transmits the stress data of the tower 101 to the control device. The control device controls the cutting device 4 to perform the cutting operation. The control device also controls the hydraulic servo loading device 2 to provide support force to the tower 101 during the cutting process. When the cutting operation is completed, the control device controls the operating end of the hydraulic servo loading device 2 to leave the tower 101, so that the hydraulic servo loading device 2 can be retrieved later. At the same time, the upper part of the tower 101 also tilts into the water due to the completion of the cutting operation. Because the anti-sinking floating device 5 is installed, it can be ensured that the tower 101 will not sink into the water, resulting in the loss of the dismantled wind turbine unit and causing economic losses. Through the above settings, the dismantling system and the dismantled wind turbine unit can be recycled and reused, avoiding high economic losses and promoting the full utilization of resources.

[0037] Optionally, the control device is electrically connected to the first control unit, second control unit, third control unit, and fourth control unit described below. The control device, first control unit, second control unit, third control unit, and fourth control unit include, but are not limited to, microcontrollers. Information is transmitted through the microcontrollers to control the operation of each device.

[0038] like Figure 3 and Figure 4 As shown, the anti-sinking floating device 5 includes: a first floating operation component 510, a second floating operation component 520, and an inflatable structure. The first floating operation component 510 and the second floating operation component 520 are respectively connected to the inflatable structure. The first floating operation component 510 is disposed at the head 102 of the wind turbine unit 1 to be dismantled, and the second floating operation component 520 is disposed inside the tower 101 of the wind turbine unit 1 to be dismantled.

[0039] In this embodiment, the first floating component 510 is positioned at the turbine head 102 of the wind turbine unit 1 to be dismantled, preventing the turbine head 102 from directly capsizing in the water upon entry and making recovery difficult; simultaneously, it reduces the impact on seawater during the tilting of the wind turbine unit 1 and minimizes the impact on the marine environment. The second floating component 520 is positioned inside the tower 101 of the wind turbine unit 1 to seal it and prevent water from entering. The first and second floating components 510 work together to ensure that the wind turbine unit 1 floats on the sea surface after entry into the water, facilitating towing.

[0040] Optionally, the inflation structure includes, but is not limited to, an air compressor.

[0041] Optionally, the first floating operation component 510 and the second floating operation component 520 may use airbags or air cushions to achieve the effect of preventing sinking.

[0042] Specifically, the first floating operation component 510 includes: a first airbag 511 and a plurality of connecting straps 512, wherein the connecting straps 512 are disposed on the first airbag 511; the first airbag 511 is provided with a snap-fit ​​groove 5111 for snapping into the head 102 of the wind turbine unit 1 to be dismantled, and the connecting straps 512 connect the first airbag 511 and the wind turbine unit 1 to be dismantled.

[0043] In this embodiment, the first airbag 511 is bound to the head 102 of the fan unit 1 to be dismantled by the connecting strap 512 fixed on the first airbag 511. Its locking groove 5111 is engaged with the central rotating shaft of the fan blade of the fan unit 1 to be dismantled, ensuring that the first airbag 511 is securely set on the fan unit 1 to be dismantled.

[0044] Optionally, the connecting strap 512 may include, but is not limited to, cable ties, Velcro, or a compression strap with a retractor.

[0045] Preferably, the connecting strap 512 is a compression strap with a retractor, so that the first floating operation component 510 can adjust the binding length of the compression strap according to the shrinkage of the inner diameter of the tower 101.

[0046] Specifically, the second floating operation component 520 includes: a folding support frame 521 and a second airbag 522, the second airbag 522 being disposed on the folding support frame 521; the folding support frame 521 being disposed inside the tower 101 of the wind turbine unit 1 to be dismantled.

[0047] In this embodiment, the folding support frame 521 is detachably disposed inside the tower 101, and the folding support frame 521 has a certain tension force, which can adapt to towers 101 with different inner diameters. The second airbag 522 is detachably disposed on the folding support frame 521, and preferably the second airbag 522 is disposed near the seawater inflow side.

[0048] Optionally, the first airbag 511 and the second airbag 522 are made of waterproof material.

[0049] Optionally, the anti-sinking floating device 5 further includes a fourth control unit, which is electrically connected to the inflation structure and the control device described above. The fourth control unit receives inflation commands from the control device and controls the inflation structure to inflate the first airbag 511 and the second airbag 522. Of course, those skilled in the art can also omit the fourth control unit and inflate the first airbag 511 and the second airbag 522 manually, achieving the same effect as in this embodiment.

[0050] like Figure 5 As shown, the folding support frame 521 includes: a connecting ring 5211, a plurality of connecting members 5212 and a plurality of connecting plates 5219. One end of the plurality of connecting members 5212 is connected to the plurality of connecting plates 5219, and the other end of the plurality of connecting members 5212 is connected to the connecting ring 5211. The plurality of connecting plates 5219 are arranged circumferentially within the tower 101 of the wind turbine unit 1 to be dismantled.

[0051] In this embodiment, the number of connectors 5212 and connecting plates 5219 is set to 12. Those skilled in the art will be motivated to adjust the number accordingly. The 12 connecting plates 5219 are evenly distributed along the circumference of the inner wall of the tower 101. One end of each of the 12 connectors 5212 is connected to one of the 12 connecting plates 5219, and the other end of each connector 5212 is connected to a connecting ring 5211. The central axis of the connecting ring 5211 coincides with the central axis of the tower 101, ensuring that each connector 5212 experiences consistent stress and structural stability.

[0052] like Figure 6 As shown, the connector 5212 includes: a hook 5213, a tensioner 5214, a tensioner 5215, and a mounting plate 5216. The tensioner 5215 is disposed on the tensioner 5214. One end of the tensioner 5214 is connected to the hook 5213, and the other end of the tensioner 5214 is rotatably connected to the mounting plate 5216. The mounting plate 5216 is connected to the connecting ring 5211.

[0053] In this embodiment, as Figure 7As shown, the hook 5213 is connected to the hole in the connecting plate 5219, and the other end of the tensioning member 5214 is connected to the mounting plate 5216 through the pin 5217, so that the connecting member 5212 can rotate vertically, which facilitates the folding support frame 521 to be retracted; the mounting plate 5216 is also provided with bolt holes 5218, and the connecting ring 5211 is also provided with through holes corresponding to the bolt holes 5218, so that the mounting plate 5216 and the connecting ring 5211 are connected by bolts; the tensioner 5215 and the tensioning member 5214 can adapt to towers 101 with different inner diameters, improving the adaptability of the structure.

[0054] Optionally, the tensioning element 5214 may include, but is not limited to, carbon fiber rods, belts, or chains.

[0055] Specifically, the folding support frame 521 further includes a plurality of reinforcing ribs 523, which connect adjacent connectors 5212 to enhance the stability of the folding support frame 521.

[0056] In this embodiment, the reinforcing rib 523 connects adjacent connecting members 5212 to form five coaxially arranged rings. Of course, those skilled in the art can adjust the number of rings according to actual needs. The second airbag 522 is detachably mounted on the connecting member 5212, preferably at the intersection of the reinforcing rib 523 and the connecting member 5212.

[0057] Specifically, the second airbag 522 is detachably mounted on the connector 5212 by means of a strap or Velcro.

[0058] In existing technologies, the sealing of steel structural components typically involves steel welding. This method requires high precision in the processing of the sealing components and high welding quality, making it suitable for sealing smaller steel components. However, it has poor adaptability for waterproofing large-diameter offshore wind turbine towers 101. This embodiment utilizes a second floating operation component 520, which employs an inflatable structure. This results in a small overall mass, lower processing precision requirements, convenient installation, and no need for extensive welding. It is applicable to towers 101 of different diameters. The connector 5212 applies pre-tension to the tensioning component 5214 via the tensioner 5215, providing out-of-plane support stiffness for the second airbag 522. The mechanical structure is simple, and the tensioner 5215 can be adjusted to accommodate towers 101 of different inner diameters. It also facilitates installation and disassembly. The second floating operation component 520 proposed in this embodiment is foldable, reusable, and occupies a small volume. Each component functions independently and can be replaced individually after damage, eliminating the need for overall scrapping and promoting resource utilization.

[0059] Optionally, the hydraulic servo loading device 2 includes: a first control unit, a first force sensor, and at least two hydraulic rods 201. The first force sensor is connected to the hydraulic rods 201, and the first control unit is electrically connected to the first force sensor and the hydraulic rods 201. One end of the hydraulic rod 201 is configured as the operating end to contact the tower 101 of the wind turbine unit 1 to be dismantled.

[0060] In this embodiment, the number of hydraulic rods 201 is set to two. Of course, those skilled in the art can make adaptive adjustments according to actual conditions. By setting the hydraulic servo loading device 2, the cutting device 4 can provide support force for the fan unit 1 to be dismantled during the cutting operation, ensuring the smooth completion of the cutting operation.

[0061] Optionally, the stress monitoring device 3 includes at least: a second force sensor and a second control unit, the second force sensor being electrically connected to the second control unit, and the second force sensor being disposed as the monitoring element 301 on the remaining part of the tower 101 of the wind turbine unit 1 to be dismantled after cutting.

[0062] In this embodiment, the stress monitoring device 3 collects and transmits data in real time to the second control unit, which then transmits it to the control device. To ensure accurate and comprehensive monitoring, multiple second force sensors can be installed and arranged at multiple points along the tower 101. The monitoring data serves as the basis for the control device to control the operation of the hydraulic servo loading device 2.

[0063] Optionally, the cutting device 4 includes a third control unit and a cutting component 401. The third control unit is electrically connected to the cutting component 401, and the cutting end of the cutting component 401 is in contact with the tower 101 of the wind turbine unit 1 to be dismantled.

[0064] In this embodiment, the number of cutting components 401 is set to two. Those skilled in the art can increase or decrease the number of cutting components 401 according to the actual cutting path.

[0065] This application also proposes a method for the overall dismantling of offshore wind turbines, which uses the aforementioned overall dismantling system for offshore wind turbines to complete the following steps:

[0066] Specifically, the offshore wind turbine dismantling system is described above and will not be repeated here.

[0067] 1) Design parameters; The specific parameters that need to be designed include, but are not limited to, the cutting path of the cutting device 4 and the tilting angle of the fan unit 1 to be dismantled.

[0068] 2) Installation system: Install the hydraulic servo loading device 2, stress monitoring device 3 and cutting device 4 at the corresponding positions of the wind turbine unit 1 to be dismantled, and conduct joint commissioning and testing; install the anti-sinking floating device 5;

[0069] 3) Start the system: The stress monitoring device 3 monitors the stress; the cutting device 4 cuts according to the designed cutting path; the hydraulic servo loading device 2 supports the tower 101 of the wind turbine unit 1 to be dismantled during the cutting process of the cutting device 4 until the cutting is completed. The hydraulic servo loading device 2 then separates from the tower 101, and the tower 101 tilts down along the upper half of the cutting line, with the end falling into the water.

[0070] 4) Recovery system: Dismantle the hydraulic servo loading device 2, stress monitoring device 3, and cutting device 4;

[0071] 5) Cut the tower 101 of the wind turbine unit 1 to be dismantled that was not completely cut in step 3) until it is completely cut open. The dismantled wind turbine unit floats completely in the water.

[0072] 6) Use ship engines or other means to tow the floating wind turbine units to the dock for recovery.

[0073] The cutting path design follows the principle of minimizing the cutting angle and the shortest path, thereby improving efficiency. The cutting line is formed by the intersection of two lines, and after cutting along the line, the tower body of tower 101 is removed.

[0074] Specifically, the optimal path for the cutting line is obtained through the following two steps:

[0075] 1.1) Calculate the maximum remaining net area after cutting using the standard formula.

[0076]

[0077] Where: σ v The stress is the equivalent design value, in MPa; S cf σ is the stress concentration factor of the structure; σ is the design value of normal stress in MPa; τ is the design value of shear stress in MPa; f is the design value of material strength in MPa.

[0078] To ensure the smooth dismantling of tower 101, take S... cf =1, The remaining net cross-sectional area of ​​the tower 101 at that time is the maximum net cross-sectional area, and thus the radial cutting depth of the tower 101 is determined.

[0079] 1.2) Based on the cutting depth calculated in the first step, the finite element simulation software is used to set different included angles between the two lines for simulation calculation and analysis to obtain the optimal cutting line.

[0080] Specifically, the working process of the hydraulic servo loading device 2 is as follows: The first force sensor transmits the force data of the hydraulic rod 201 to the first control unit, which then transmits it to the control device. During the cutting process before the cutting device 4 completes the cutting operation, when the stress of a single monitoring element 301 of the stress monitoring device 3 reaches the yield strength, the control device controls the hydraulic servo loading device 2 to apply a supporting force to ensure the stability of the wind turbine unit 1 to be dismantled during the cutting process. After cutting, the hydraulic servo loading device 2 gradually unloads. At this time, according to the data from the monitoring device, it should gradually enter the yield state at multiple points. If the yield point development is relatively slow, reverse loading can be applied to provide tension and accelerate the tilting process of the tower 101. Based on the monitoring data, if there is an asymmetrical yield development, the output of each hydraulic rod 201 is adjusted by the control device to achieve a smooth tilting of the wind turbine unit 1 to be dismantled. According to the data from the monitoring device, it should gradually enter the yield state at multiple points, and the yield development should be symmetrical. The control device controls the hydraulic servo loading device 2 to automatically disconnect from the tower 101, and the wind turbine unit 1 to be dismantled tilts smoothly.

[0081] The dismantling system and the dismantled wind turbine units proposed in this application can be recycled and reused, avoiding high economic losses and promoting the full utilization of resources.

[0082] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0083] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0084] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0085] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. The preferred embodiments have been described in detail. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application, and all such modifications and substitutions should be covered within the scope of the claims of this application.

Claims

1. A system for the overall dismantling of offshore wind turbines, characterized in that, include: The system includes a hydraulic servo loading device, a stress monitoring device, a cutting device, an anti-sinking floating device, and a control device. The hydraulic servo loading device, the stress monitoring device, the cutting device, and / or the anti-sinking floating device are respectively connected to the control device. The operating end of the hydraulic rod of the hydraulic servo loading device, the monitoring element of the stress monitoring device, the cutting end of the cutting device, and the working element of the anti-sinking floating device are arranged in contact with the tower of the wind turbine unit to be dismantled. The anti-sinking floating device includes: a first floating operation component, a second floating operation component, and an inflatable structure. The first floating operation component and the second floating operation component are respectively connected to the inflatable structure. The first floating operation component is installed at the turbine head of the wind turbine unit to be dismantled, and the second floating operation component is installed inside the tower of the wind turbine unit to be dismantled. The first floating operation component includes: a first airbag and a plurality of connecting straps, the connecting straps being disposed on the first airbag; the first airbag is provided with a snap-fit ​​groove for engaging with the turbine head of the wind turbine unit to be dismantled, and the connecting straps connecting the first airbag and the wind turbine unit to be dismantled; The second floating operation component includes: a folding support frame and a second airbag, the second airbag being disposed on the folding support frame; the folding support frame being disposed inside the tower of the wind turbine unit to be dismantled.

2. The offshore wind turbine overall dismantling system according to claim 1, characterized in that, The folding support frame includes: a connecting ring, multiple connecting members, and multiple connecting plates. One end of each of the multiple connecting members is connected to a corresponding connecting plate, and the other end of each of the multiple connecting members is connected to the connecting ring. The multiple connecting plates are arranged circumferentially within the tower of the wind turbine unit to be dismantled.

3. The offshore wind turbine overall dismantling system according to claim 2, characterized in that, The connector includes: a hook, a tensioning element, a tensioner, and a mounting plate. The tensioner is disposed on the tensioning element. One end of the tensioning element is connected to the hook, and the other end of the tensioning element is rotatably connected to the mounting plate. The mounting plate is connected to the connecting ring. And / or, the folding support frame further includes: a plurality of reinforcing ribs, the reinforcing ribs connecting adjacent connectors.

4. The offshore wind turbine overall dismantling system according to any one of claims 1 to 3, characterized in that, The hydraulic servo loading device includes: a first control unit, a first force sensor, and at least two hydraulic rods. The first force sensor is connected to the hydraulic rods, and the first control unit is electrically connected to the first force sensor and the hydraulic rods. One end of the hydraulic rod serves as the operating end and is arranged in contact with the tower of the wind turbine unit to be dismantled.

5. The offshore wind turbine overall dismantling system according to any one of claims 1 to 3, characterized in that, The stress monitoring device includes at least: a second force sensor and a second control unit, wherein the second force sensor is electrically connected to the second control unit, and the second force sensor is installed as the monitoring element on the remaining part of the tower of the wind turbine unit to be dismantled after cutting.

6. The offshore wind turbine overall dismantling system according to any one of claims 1 to 3, characterized in that, The cutting device includes a third control unit and a cutting component. The third control unit is electrically connected to the cutting component, and the cutting end of the cutting component is in contact with the tower of the wind turbine unit to be dismantled.

7. A method for the overall dismantling of an offshore wind turbine, characterized in that, Using the offshore wind turbine overall dismantling system according to any one of claims 1 to 6, the following steps are completed: 1) Design parameters; 2) Installation system: Install the hydraulic servo loading device, stress monitoring device, and cutting device at the corresponding positions of the wind turbine unit to be dismantled, and conduct joint commissioning and testing; install the anti-sinking floating device; 3) Start-up system: The stress monitoring device monitors stress; the cutting device cuts according to the designed cutting path; the hydraulic servo loading device supports the tower of the wind turbine unit to be dismantled during the cutting process until the cutting is completed. The hydraulic servo loading device then detaches from the tower, and the tower tilts down along the upper half of the cutting line, with the end falling into the water. 4) Recovery system: Dismantle the hydraulic servo loading device, stress monitoring device, and cutting device; 5) Cut the tower of the wind turbine unit to be dismantled that was not completely cut in step 3) until it is completely cut; 6) Recover the wind turbine units that are floating in the water after dismantling.

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