Jacket type wind turbine and wave energy conversion device combined system and landing method

Abstract

The invention provides a jacket type wind turbine and wave energy conversion device combined system and a landing method, and relates to the field of offshore wind power structures and the field of offshore wave energy, and the jacket type wind turbine and wave energy conversion device combined system comprises a wind turbine, an operation platform, a jacket and a wave energy conversion device; the bottom of the jacket is fixed on a seabed; the working platform is mounted at the top of the jacket; the wind turbine is mounted on the working platform; the wave energy conversion devices are installed on the periphery of the working platform. The wave energy conversion device is combined with the wind turbine, efficient utilization of energy can be achieved, and therefore the purpose of improving the power output stability of the system is achieved; and the personal safety of the wind power operation and maintenance personnel during landing and evacuation can be protected.

Description

Technical Field

[0001] The present invention relates to the field of offshore wind power structures and offshore wave energy technology, and in particular to a system combining a jacket-type wind turbine and a wave energy conversion device and a landing method. Background Art

[0002] With the environmental problems caused by the combustion of fossil energy and the current situation of limited fossil energy reserves, replacing traditional fossil energy with renewable energy has become the focus of future energy industry development. Offshore wind energy development technology is more mature than other forms of energy. However, extreme sea conditions pose a greater threat to the core components of offshore wind turbines. Therefore, offshore wind turbines need to be shut down under extreme sea conditions, which will be detrimental to the continuous and stable output of electricity.

[0003] During the operation of offshore jacket-type wind turbines, wind power operation and maintenance personnel need to conduct regular maintenance on them. However, when there are strong winds and waves at sea, it is risky for wind power operation and maintenance personnel to transfer from the ship to the offshore jacket-type wind turbine operating platform.

[0004] In view of this, the inventor of the present application has designed a system and a landing method combining a jacket-type wind turbine and a wave energy conversion device, in order to overcome the above-mentioned technical problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defect in the prior art that there is a greater risk in transferring wind power operation and maintenance personnel from a ship to an offshore jacket-type wind turbine operating platform when there are strong winds and waves at sea, and to provide a system and landing method combining a jacket-type wind turbine with a wave energy conversion device.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] The present invention provides a system combining a jacket-type wind turbine and a wave energy conversion device, which is characterized in that the system combining a jacket-type wind turbine and a wave energy conversion device comprises: a wind turbine, an operating platform, a jacket, and a wave energy conversion device; the bottom of the jacket is fixed on the seabed; the operating platform is installed on the top of the jacket; the wind turbine is installed on the operating platform; and the wave energy conversion device is installed around the operating platform.

[0008] According to one or more embodiments of the present invention, the wind turbine includes wind turbine blades, a wind turbine generator cabin, and a wind turbine tower; the wind turbine blades are connected to the wind turbine generator cabin; the wind turbine generator cabin is arranged on the top of the wind turbine tower, and the wind turbine tower is installed on the working platform.

[0009] According to one or more embodiments of the present invention, the wave energy conversion device includes: a wave energy buoy and a primary buoy support rod; the primary buoy support rod is movably connected to the working platform; the wave energy buoy is connected to the bottom of the primary buoy support rod, and the wave energy buoy floats on the sea surface.

[0010] According to one or more embodiments of the present invention, a float movement limiter is provided on the upper portion of the primary float support rod.

[0011] According to one or more embodiments of the present invention, a groove is provided in the middle of the lower portion of the wave energy buoy.

[0012] According to one or more embodiments of the present invention, the wave energy conversion device also includes a float support extension arm and a secondary float support rod; the primary float support rod is movably connected to the working platform through the float support extension arm and the secondary float support rod; the secondary float support rod is fixedly connected to the working platform; the float support extension arm is movably connected to the secondary float support rod, and the float support extension arm moves up and down along the secondary float support rod; the primary float support rod is movably connected to the float support extension arm.

[0013] According to one or more embodiments of the present invention, the primary float support rod can be locked by the float support extension arm at any position.

[0014] According to one or more embodiments of the present invention, the float support extension arm can be locked at any position of the secondary float support rod.

[0015] According to one or more embodiments of the present invention, the wave energy conversion device also includes a bottom landing deck and a connecting ladder, the working platform has a working platform mounting arm extending outward; the bottom landing deck is installed on the diagonal support rod of the conductor frame; the connecting ladder passes through the working platform and the bottom landing deck and is connected to the diagonal support rod of the conductor frame.

[0016] The present invention also provides an operation and maintenance landing method, which is characterized in that the operation and maintenance landing method is used to enable operation and maintenance personnel to log in to the system combining the conductor frame wind turbine and the wave energy conversion device as described above from a ship, and the operation and maintenance landing method comprises the following steps: S1, placing a cushion block on the front edge of the deck of the ship; S2, when the ship is ready to berth, raising the first-level float support rod, and when the groove is higher than the cushion block, locking the first-level float support rod on the float support extension arm, adjusting the position of the ship and the cushion block so that they are just below the groove, unlocking the first-level float support rod, and lowering the first-level float support rod. S3, the operation and maintenance personnel transfer from the deck of the ship to the upper surface platform of the wave energy float through the pad, lift the first-level float support rod and / or the float support extension arm, when the upper surface of the wave energy float and the upper surface of the bottom landing deck are at the same horizontal plane, lock the first-level float support rod on the float support extension arm, lock the float support extension arm on the second-level float support rod, and transfer the operation and maintenance personnel from the wave energy float to the bottom landing deck; S4, the operation and maintenance personnel enter the working platform through the connecting ladder.

[0017] The positive and progressive effects of the present invention are:

[0018] The system combining the jacket-type wind turbine and the wave energy conversion device of the present invention has at least the following advantages:

[0019] The system of the present invention combines the duct-type wind turbine with the wave energy conversion device, which combines the wave energy conversion device with the wind turbine to achieve efficient use of energy, thereby improving the stability of the system's power output; and can protect the personal safety of wind power operation and maintenance personnel during landing and evacuation, and is a multifunctional facility that can achieve multi-energy complementarity and protect the safety of operation and maintenance personnel during the transfer process. The operation and maintenance landing method of the present invention can effectively reduce the risk of wind power operation and maintenance personnel performing daily maintenance on offshore wind power equipment, and at the same time can improve the comfort of landing and leaving the working platform of the duct-type wind power equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always represent the same features, wherein:

[0021] Figure 1 It is a three-dimensional schematic diagram of an embodiment of a system combining a duct-type wind turbine and a wave energy conversion device according to the present invention.

[0022] Figure 2 It is a side view schematic diagram of an embodiment of a system combining a duct-type wind turbine and a wave energy conversion device according to the present invention.

[0023] Figure 3It is a top view schematic diagram of the remaining components after removing the wind turbine blades and the wind turbine generator cabin in one embodiment of the system combining a duct-type wind turbine and a wave energy conversion device of the present invention.

[0024] Figure 4 It is a schematic structural diagram of a wave energy conversion device in one embodiment of a system combining a duct-type wind turbine and a wave energy conversion device according to the present invention.

[0025] Figure 5 It is a schematic diagram of the login process of an embodiment of the operation and maintenance login method of the present invention.

[0026] [Reference Signs]

[0027] Wind turbine 10

[0028] Wind turbine blades11

[0029] Wind turbine generator cabin 12

[0030] Wind turbine tower 13

[0031] Work platform 20

[0032] Work platform mounting arm 21

[0033] Pipe rack 30

[0034] Wave energy conversion device 40

[0035] Wave Energy Float 41

[0036] First level float support rod 42

[0037] Float movement limiter 43

[0038] Lower landing deck 44

[0039] Connecting ladder 45

[0040] Secondary float support rod 46

[0041] Float support extension arm 47

[0042] Groove 48

[0043] Ship 50

[0044] Deck 51

[0045] Block 52 DETAILED DESCRIPTION

[0046] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0047] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to preferred embodiments of the present invention, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals will be used in all drawings to represent the same or similar parts. In addition, although the terms used in the present invention are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present invention may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description herein. In addition, it is required to understand the present invention not only by the actual terms used, but also by the meaning implied by each term.

[0048] See also Figure 1 to Figure 4 The present invention provides a system combining a jacket-type wind turbine and a wave energy conversion device, wherein the system combining a jacket-type wind turbine and a wave energy conversion device comprises: a wind turbine 10, an operating platform 20, a jacket 30, and a wave energy conversion device 40;

[0049] The bottom of the jacket 30 is fixed on the seabed; the working platform 20 is installed on the top of the jacket 30; the wind turbine 10 is installed on the working platform 20; and the wave energy conversion device 40 is installed around the working platform 20.

[0050] It should be noted that the duct-frame wind turbine structure used in the present invention does not specifically refer to a duct-frame wind turbine of a certain model and specification.

[0051] Preferably, the system combining the jacket-type wind turbine and the wave energy conversion device of the present invention comprises four wave energy conversion devices 40 ; the working platform 20 is square, and the four wave energy conversion devices 40 are arranged on the four sides of the working platform 20 .

[0052] The system combining the duct-type wind turbine and the wave energy conversion device of the present invention achieves the purpose of improving the stability of the power output of the system by arranging the wave energy conversion device 40 around the duct-type wind turbine.

[0053] Generally, places with abundant offshore wind resources also have abundant wave energy resources. The system combining the jacket-type wind turbine and the wave energy conversion device of the present invention combines the wave energy conversion device 40 with the wind turbine 10, which can realize efficient utilization of energy, effectively improve the energy output per unit sea area, and thus improve the utilization rate of the ocean space. The system of the present invention has a high structural utilization rate and can be applied to water depths of 20 to 50 meters offshore, thereby improving the economic benefits of the offshore wind power industry.

[0054] Since offshore wind energy is volatile and the absorbed energy is not stable, while wave energy is relatively stable, when offshore wind energy is small, the wave energy conversion device 40 can improve the stability of power supply.

[0055] The present invention arranges the wind turbine 10 and the wave energy conversion device 40 in the same field, and can share the relevant engineering vessels 50 and professionals in the process of power plant construction and later operation and maintenance, thereby reducing the cost of engineering construction and maintenance. At the same time, the wave energy conversion device can also be used by operation and maintenance personnel to land on the work platform from the ship for maintenance.

[0056] See also Figure 1-2 As a preferred embodiment of the system combining a jacket-type wind turbine and a wave energy conversion device of the present invention, a wind turbine 10 includes a wind turbine blade 11, a wind turbine generator cabin 12, and a wind turbine tower 13;

[0057] The wind turbine blades 11 are connected to a wind turbine generator cabin 12 ; the wind turbine generator cabin 12 is disposed on the top of a wind turbine tower 13 , and the wind turbine tower 13 is mounted on a working platform 20 .

[0058] It should be noted that the wind turbine blades 11 are located at the top of the wind turbine. Under the action of wind, the wind turbine blades 11 rotate and drive the gear box and generator inside the wind turbine generator compartment 12 to work, so as to convert wind energy into electrical energy. The wind turbine generator compartment 12 is installed on the top of the wind turbine tower 13.

[0059] Preferably, the lower part of the wind turbine tower 13 is installed at the center of the working platform 20 , and the working platform 20 is installed on the top of four main supporting conduits of the foundation of the conduit rack 30 .

[0060] See also Figure 4 , as a preferred embodiment of the system combining the jacket-type wind turbine and the wave energy conversion device of the present invention, the wave energy conversion device 40 includes: a wave energy buoy 41 and a primary buoy support rod 42;

[0061] The first-level float support rod 42 is movably connected to the working platform 20; the wave energy float 41 is connected to the bottom of the first-level float support rod 42, and the wave energy float 41 floats on the sea surface.

[0062] It should be noted that when no personnel are logged on or evacuated, the wave energy buoy 41 floats on the sea surface, and moves vertically with the waves, and the first-stage buoy support rod 42 moves along with the wave energy buoy 41 .

[0063] See also Figure 4 As a preferred embodiment of the system combining the jacket-type wind turbine and the wave energy conversion device of the present invention, a float movement limiter 43 is provided on the upper part of the first-level float support rod 42.

[0064] See also Figure 4 As a preferred embodiment of the system combining the jacket-type wind turbine and the wave energy conversion device of the present invention, a groove 48 is provided at the middle position of the lower part of the wave energy buoy 41 .

[0065] The groove 48 can cooperate with the pad 52 at the front edge of the deck 51 of the ship 50 to facilitate the operation and maintenance personnel to land on or evacuate the work platform. The groove 48 is preferably square.

[0066] Preferably, the outer side surface of the wave energy buoy 41 is a streamlined curved surface that is thicker at the top and thinner at the bottom, a portion of the middle of the wave energy buoy 41 is cut off to form a groove 48, and the top of the wave energy buoy 41 is a horizontal plane.

[0067] See also Figure 4 As a preferred embodiment of the system combining the jacket-type wind turbine and the wave energy conversion device of the present invention, the wave energy conversion device 40 further includes a float support extension arm 47 and a secondary float support rod 46; the primary float support rod 42 is movably connected to the working platform 20 through the float support extension arm 47 and the secondary float support rod 46;

[0068] The secondary float support rod 46 is fixedly connected to the working platform 20; the float support extension arm 47 is movably connected to the secondary float support rod 46, and the float support extension arm 47 moves up and down along the secondary float support rod 46; the primary float support rod 42 is movably connected to the float support extension arm 47.

[0069] See also Figure 4 As a preferred embodiment of the system combining the jacket-type wind turbine and the wave energy conversion device of the present invention, the primary float support rod 42 can be locked by the float support extension arm 47 at any position.

[0070] See also Figure 4 As a preferred embodiment of the system combining the jacket-type wind turbine and the wave energy conversion device of the present invention, the buoy support extension arm 47 can be locked at any position of the secondary buoy support rod 46.

[0071] exist Figure 4 In the embodiment, two float support extension arms 47 are provided, and the two float support extension arms 47 can move up and down along the secondary float support rod 46 , and the float support extension arms 47 can be locked at any position of the secondary float support rod 46 .

[0072] See also Figure 4 As a preferred embodiment of the system combining the jacket-type wind turbine and the wave energy conversion device of the present invention, the wave energy conversion device 40 further includes a bottom landing deck 44 and a connecting ladder 45, and the working platform 20 has a working platform installation arm 21 extending outward;

[0073] The bottom landing deck 44 is installed on the diagonal braces of the conductor frame 30 ; the connecting ladder 45 passes through the working platform 20 and the bottom landing deck 44 and is connected to the diagonal braces of the conductor frame 30 .

[0074] exist Figure 4 In the embodiment, the wave energy buoy 41 of the wave energy conversion device 40 is connected to the working platform 20 and the conductor frame 30 of the conductor frame wind turbine through the first-level buoy support rod 42, the buoy movement limiter 43, the bottom landing deck 44, the second-level buoy support rod 46, the buoy support extension arm 47 and the working platform installation arm 21.

[0075] The system combining the jacket-type wind turbine and the wave energy conversion device of the present invention has a high structural utilization rate, is suitable for offshore water depths of 20 to 50 meters, and can improve the economic benefits of the offshore wind power industry. The structure of the wave energy conversion device 40 is a device that integrates the safe transfer of wave energy conversion personnel. It is people-oriented and can effectively reduce the risk of wind power operation and maintenance personnel performing daily maintenance on offshore wind power equipment, and improve the comfort of landing and leaving the jacket-type foundation.

[0076] As described above, the system combining the conductor-mounted wind turbine and the wave energy conversion device of the present invention achieves the purpose of improving the stability of the system power output by arranging the wave energy conversion device 40 around the conductor-mounted wind turbine; and can protect the personal safety of wind power operation and maintenance personnel during landing and evacuation. It is a multifunctional facility that can achieve multi-energy complementarity and protect the safety of operation and maintenance personnel during the transfer process.

[0077] See also Figure 5 The present invention also provides an operation and maintenance landing method for enabling operation and maintenance personnel to log into the system combining the jacket-type wind turbine and the wave energy conversion device as described above from a ship 50, and the operation and maintenance landing method comprises the following steps:

[0078] Step S1, placing a pad 52 on the front edge of the deck 51 of the ship 50;

[0079] Step S2, when the ship 50 is ready to berth, the first-level float support rod 42 is raised, and when the groove 48 is higher than the pad 52, the first-level float support rod 42 is locked on the float support extension arm 47, and the positions of the ship 50 and the pad 52 are adjusted to be just below the groove 48, and the first-level float support rod 42 is unlocked, so that the first-level float support rod 42 is lowered, so that the wave energy float 41 is located on the upper surface of the pad 52, and the wave energy float 41 and the ship 50 are relatively stationary;

[0080] Step S3, the operation and maintenance personnel transfer from the deck 51 of the ship 50 to the upper surface platform of the wave energy buoy 41 through the pad 52, lift the first-level buoy support rod 42 and / or the buoy support extension arm 47, and when the upper surface of the wave energy buoy 41 is at the same horizontal plane as the upper surface of the bottom landing deck 44, lock the first-level buoy support rod 42 on the buoy support extension arm 47, and lock the buoy support extension arm 47 on the second-level buoy support rod 46, and the operation and maintenance personnel transfer from the wave energy buoy 41 to the bottom landing deck 44;

[0081] Step S4: The operation and maintenance personnel enter the working platform by connecting the ladder 45.

[0082] It should be noted that in step S1 , when a wind power operation and maintenance personnel needs to land on or evacuate the work platform, a cushion block 52 needs to be placed on the front edge of the deck 51 of the ship 50 first.

[0083] It should be noted that in step S2, when the ship 50 is ready to berth, the first-level float support rod 42 is raised, and when the square groove 48 is higher than the pad 52, the first-level float support rod 42 is locked on the float support extension arm 47, and the position of the ship 50 and the pad 52 is adjusted so that they are just below the square groove 48, and the first-level float support rod 42 is unlocked, so that it slowly descends and just sits on the upper surface of the pad 52. At this time, the wave energy buoy 41 and the ship 50 are relatively stationary.

[0084] It should be noted that in step S3, the operation and maintenance personnel transfer from the deck 51 of the ship 50 to the upper surface platform of the wave energy buoy 41 through the pad 52, and slowly lift the first-level buoy support rod 42. If it is possible to achieve that the upper surface platform of the wave energy buoy 41 and the upper surface of the bottom landing deck 44 are at the same horizontal plane, the first-level buoy support rod 42 is locked on the buoy support extension arm 47, and the operation and maintenance personnel transfer from the wave energy buoy 41 to the bottom landing deck 44. If lifting the first-level buoy support rod 42 cannot achieve the wave energy buoy 41, the first-level buoy support rod 42 is locked on the buoy support extension arm 47. 1 is at the same horizontal plane as the upper surface of the bottom landing deck 44, then when the first-level float support rod 42 is lifted to the highest position, it is locked on the float support extension arm 47, and the float support extension arm 47 is lifted along the second-level float support rod 46 by the lifting device. When the upper surface platform of the wave energy float 41 is at the same horizontal plane as the upper surface of the bottom landing deck 44, the float support extension arm 47 is locked on the second-level float support rod 46, and the operation and maintenance personnel are transferred from the wave energy float 41 to the bottom landing deck 44.

[0085] It should be noted that in step S3, the operation and maintenance personnel enter the working platform to perform maintenance operations by connecting the ladder 45.

[0086] The operation and maintenance landing method of the present invention relies on the system of combining the conductor frame wind turbine and the wave energy conversion device of the present invention. By adopting the operation and maintenance landing method of the present invention, the risk of wind power operation and maintenance personnel performing daily maintenance on offshore wind power equipment can be effectively reduced, and at the same time, the comfort of landing and leaving the working platform of the conductor frame wind power equipment can be improved.

[0087] In summary, the system combining the jacket-type wind turbine and the wave energy conversion device of the present invention combines the wave energy conversion device 40 with the wind turbine 10, which can achieve efficient use of energy, thereby improving the stability of the system power output; and can protect the personal safety of wind power operation and maintenance personnel during landing and evacuation, and is a multifunctional facility that can achieve multi-energy complementarity and protect the safety of operation and maintenance personnel during the transfer process. The operation and maintenance landing method of the present invention can effectively reduce the risk of wind power operation and maintenance personnel performing daily maintenance on offshore wind power equipment, and at the same time can improve the comfort of landing and leaving the working platform of the jacket-type wind power equipment.

[0088] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A system combining a jacket-type wind turbine and a wave energy conversion device, characterized in that: The system combining the jacket-type wind turbine and the wave energy conversion device comprises: a wind turbine, an operating platform, a jacket, and a wave energy conversion device; The bottom of the conductor frame is fixed on the seabed; the working platform is installed on the top of the conductor frame; the wind turbine is installed on the working platform; and the wave energy conversion device is installed around the working platform.

2. The system of combining a jacket-type wind turbine and a wave energy conversion device as claimed in claim 1, characterized in that: The wind turbine comprises wind turbine blades, a wind turbine generator cabin, and a wind turbine tower; The wind turbine blades are connected to the wind turbine generator cabin; the wind turbine generator cabin is arranged on the top of the wind turbine tower, and the wind turbine tower is installed on the working platform.

3. The system of combining a jacket-type wind turbine and a wave energy conversion device as claimed in claim 1, characterized in that: The wave energy conversion device comprises: a wave energy buoy and a primary buoy support rod; The first-level float support rod is movably connected to the working platform; the wave energy float is connected to the bottom of the first-level float support rod, and the wave energy float floats on the sea surface.

4. The system of combining a jacket-type wind turbine and a wave energy conversion device as claimed in claim 3, characterized in that: A float movement limiter is arranged on the upper part of the first-level float support rod.

5. The system of combining a jacket-type wind turbine and a wave energy conversion device as claimed in claim 3, characterized in that: A groove is arranged in the middle of the lower part of the wave energy float.

6. The system of combining a jacket-type wind turbine and a wave energy conversion device as claimed in claim 3, characterized in that: The wave energy conversion device further comprises a float support extension arm and a secondary float support rod; the primary float support rod is movably connected to the working platform through the float support extension arm and the secondary float support rod; The secondary float support rod is fixedly connected to the working platform; the float support extension arm is movably connected to the secondary float support rod, and the float support extension arm moves up and down along the secondary float support rod; the primary float support rod is movably connected to the float support extension arm.

7. The system of combining a jacket-type wind turbine and a wave energy conversion device as claimed in claim 6, characterized in that: The primary float support rod can be locked by the float support extension arm at any position.

8. The system of combining a jacket-type wind turbine and a wave energy conversion device as claimed in claim 6, characterized in that: The float support extension arm can be locked at any position of the secondary float support rod.

9. The system of combining a jacket-type wind turbine and a wave energy conversion device as claimed in claim 6, characterized in that: The wave energy conversion device further comprises a bottom landing deck and a connecting ladder, and the working platform has a working platform mounting arm extending outwards; The bottom landing deck is installed on the diagonal braces of the conductor frame; the connecting ladder passes through the working platform and the bottom landing deck and is connected with the diagonal braces of the conductor frame.

10. An operation and maintenance login method, characterized in that: The operation and maintenance landing method is used to enable the operation and maintenance personnel to log in to the system combining the jacket-type wind turbine and the wave energy conversion device according to any one of claims 1 to 9 from a ship, and the operation and maintenance landing method comprises the following steps: S1. Place a pad on the front edge of the ship's deck; S2. When the ship is ready to berth, the first-level float support rod is raised. When the groove is higher than the pad, the first-level float support rod is locked on the float support extension arm. The position of the ship and the pad is adjusted so that they are just under the groove. The first-level float support rod is unlocked and lowered so that the wave energy float is located on the upper surface of the pad. At this time, the wave energy float and the ship are relatively stationary. S3. The operation and maintenance personnel transfer from the deck of the ship to the upper surface platform of the wave energy float through the pads, lift the first-level float support rod and / or the float support extension arm, and when the upper surface of the wave energy float is at the same level as the upper surface of the bottom landing deck, lock the first-level float support rod on the float support extension arm, and lock the float support extension arm on the second-level float support rod, and the operation and maintenance personnel transfer from the wave energy float to the bottom landing deck; S4. Operation and maintenance personnel enter the working platform through the connecting ladder.

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