Telescopic embarkation device of deep sea floating type draught fan and using method of telescopic embarkation device

Abstract

The invention discloses a telescopic embarkation device of a deep sea floating type draught fan and a using method thereof.The device comprises a fixed embarkation ladder and a telescopic device, the fixed embarkation ladder comprises a plurality of stair platforms and a plurality of stair sections, each stair platform is fixed to the side wall of a floating type draught fan platform, and each stair section is fixed to the corresponding stair platform; every two adjacent stair platforms are connected through a stair section; the telescopic device is arranged on a stair platform on the bottommost layer and comprises a control box and a telescopic mechanism, the telescopic mechanism comprises a telescopic handrail, and a lifting lug is arranged at the outer end of the telescopic handrail; a telescopic handrail motor is arranged in the control box, the telescopic handrail motor is a linear motor, an output shaft of the telescopic handrail motor is fixedly connected with the telescopic handrail, when the output shaft of the telescopic handrail motor moves forwards, the telescopic handrail extends, and when the output shaft of the telescopic handrail motor moves backwards, the telescopic handrail extends. And the telescopic handrail is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of floating wind turbines, and in particular to a retractable boarding device for a deep-sea floating wind turbine and a use method thereof. Background Art

[0002] As the development of offshore fixed wind power in my country gradually reaches saturation, the development of deep-sea floating wind power has become an inevitable trend. Compared with offshore fixed wind power, deep-sea floating wind power is farther from the shore, has worse sea conditions, and is mostly unmanned, which greatly increases the cost and difficulty of operation and maintenance. At present, floating wind turbine boarding ladders mostly refer to fixed wind turbine platforms. When operation and maintenance personnel need to land on the wind turbine platform for maintenance, the operation and maintenance ship needs to lean against the wind turbine platform to send personnel to the boarding ladder. Due to the multi-degree-of-freedom movement of the floating wind turbine platform, there is a risk of large collision force between the floating wind turbine platform and the operation and maintenance ship. At the same time, due to the movement of heave, swaying, etc., it is difficult for personnel to climb the boarding ladder, and there is a risk of falling into the sea and collision.

[0003] In short, there is currently a lack of a boarding ladder suitable for deep-sea floating wind turbines to ensure the safety of operation and maintenance personnel boarding. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a retractable boarding device for a deep-sea floating wind turbine and a method of using the same, so as to solve the current problem of lack of a boarding ladder suitable for deep-sea floating wind turbines and ensure the safety of operation and maintenance personnel boarding.

[0005] To achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention discloses a retractable boarding device for a deep-sea floating wind turbine, which is arranged on a floating wind turbine platform and comprises: A fixed boarding ladder comprises a plurality of stair platforms and a plurality of stair flights, each stair platform being fixed on a side wall of the floating wind turbine platform, and each two adjacent stair platforms being connected by a stair flight; The telescopic device is arranged on the staircase platform at the bottom layer, and comprises a control box and a telescopic mechanism, wherein the telescopic mechanism comprises a telescopic railing, and a lifting lug is arranged at the outer end of the telescopic railing; a telescopic railing motor is arranged in the control box, and the telescopic railing motor is a linear motor, and the output shaft of the telescopic railing motor is fixedly connected to the telescopic railing, and when the output shaft of the telescopic railing motor moves forward, the telescopic railing is extended, and when the output shaft of the telescopic railing motor moves backward, the telescopic railing is shortened.

[0006] When the boarding personnel board the floating wind turbine platform from the maintenance ship, the telescopic railing motor is started to extend the telescopic railing outward; a hanging rope is passed through the lifting lug, the hanging rope is hung on the boarding personnel, and the boarding personnel is lifted to the telescopic mechanism by pulling the hanging rope; the boarding personnel walk to the staircase platform at the bottom and board the deck of the floating wind turbine platform through the fixed boarding ladder; When the boarding personnel return to the operation and maintenance ship from the deck of the floating wind turbine platform, the telescopic railing motor is started to extend the telescopic railing outward; the boarding personnel go down from the deck of the floating wind turbine platform to the stair platform at the bottom layer through the fixed boarding ladder, and then walk to the lifting lug of the telescopic mechanism; a hanging rope is passed through the lifting lug, and the hanging rope is hung on the boarding personnel, and the boarding personnel reaches the operation and maintenance ship by lowering the hanging rope.

[0007] Furthermore, the telescopic mechanism also includes a horizontal telescopic ladder, and a horizontal telescopic ladder motor is arranged in the control box. The horizontal telescopic ladder motor is a linear motor, and the output shaft of the horizontal telescopic ladder motor is fixedly connected to the horizontal telescopic ladder, and when the output shaft of the horizontal telescopic ladder motor moves forward, the horizontal telescopic ladder extends, and when the output shaft of the horizontal telescopic ladder motor moves backward, the horizontal telescopic ladder shortens; the horizontal telescopic ladder is used to carry passengers.

[0008] Furthermore, a vertical rod is vertically arranged at the outer end of the telescopic railing, and an anti-collision rubber pad is sleeved on the vertical rod; a roller is arranged at the bottom of the vertical rod, and a telescopic guide rail is arranged on the horizontal telescopic ladder. When the telescopic railing and the horizontal telescopic ladder are extended or shortened at the same time, the roller at the bottom of the vertical rod just slides on the telescopic guide rail.

[0009] Furthermore, the telescopic mechanism also includes at least one group of parallelogram continuous frames, which are formed by a plurality of parallelogram rod units being hinged end to end in sequence, and the four nodes of each parallelogram rod unit are hingedly connected; the two ends of each group of parallelogram continuous frames are respectively arranged on the box wall of the control box and on the vertical rod; when the telescopic railing and the horizontal telescopic ladder are extended or shortened at the same time, the parallelogram continuous frames are respectively expanded and folded.

[0010] Furthermore, an active rotating shaft is provided at the connection between the telescopic railing motor and the bottom stair platform. When the active rotating shaft is equipped with a rotating motor, when the rotating motor rotates, the telescopic railing of the telescopic mechanism moves upward, so that the lifting ear hanging passengers move upward.

[0011] Furthermore, diagonal braces are arranged on the stair platforms.

[0012] Furthermore, several of the stair platforms include multiple floor platforms and multiple intermediate platforms, an intermediate platform is arranged between two adjacent floor platforms, adjacent intermediate platforms and floor platforms are staggered with each other, and the projections of all floor platforms on the sea surface overlap, the projections of all intermediate platforms on the sea surface overlap, and adjacent floor platforms and intermediate platforms are connected by a stair flight.

[0013] Furthermore, a guardrail is provided on the stair platform of the fixed boarding ladder.

[0014] In a second aspect, the present invention also discloses a method for using the retractable boarding device of the deep-sea floating wind turbine, comprising: Step A: The boarding personnel board the deck of the floating wind turbine platform from the maintenance vessel, including the following steps: Step A1: After the maintenance vessel arrives at the designated area and maintains a sufficient safety distance from the floating wind turbine platform, the telescopic railing motor is started to extend the telescopic railing outward; Step A2: a lanyard is passed through the lifting lug, the lanyard is hung on the passenger, and the passenger is lifted to the telescopic mechanism by pulling the lanyard; Step A3: After the passengers have reached the top of the telescopic railing, the motor of the horizontal telescopic ladder is started to drive the horizontal telescopic ladder to extend, and at the same time, the roller at the bottom of the vertical rod slides in the telescopic guide rail on the horizontal telescopic ladder, and the length of the telescopic railing and the horizontal telescopic ladder are adjusted during the process until the telescopic railing and the horizontal telescopic ladder are flush, and the passengers stand on the horizontal telescopic ladder; Step A4: The boarding personnel walk to the staircase platform at the bottom and board the deck of the floating wind turbine platform via the fixed boarding ladder; Step A5: starting the telescopic railing motor to shorten the telescopic railing inward until it is completely retracted; Step B: The boarding personnel return to the operation and maintenance vessel from the deck of the floating wind turbine platform, including the following steps: Step B1: starting the telescopic railing motor to extend the telescopic railing outward; Step B2: The boarding personnel go down from the deck of the floating wind turbine platform to the staircase platform at the bottom through the fixed boarding ladder, and then walk to the lifting lug of the telescopic mechanism; Step B3: a lanyard is passed through the lifting lug, the lanyard is hung on the boarding personnel, and the boarding personnel is lowered by lowering the lanyard. During this time, the telescopic railing motor and the horizontal telescopic ladder motor are started, and the lengths of the telescopic railing and the horizontal telescopic ladder are adjusted until the telescopic railing and the horizontal telescopic ladder are flush, so that the boarding personnel can reach the operation and maintenance vessel; Step B4: Start the telescopic railing motor to shorten the telescopic railing inward until it is fully retracted.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (I) The present invention discloses a retractable boarding device for a deep-sea floating wind turbine, comprising a fixed boarding ladder and a retractable device, wherein the fixed boarding ladder comprises a plurality of stair platforms and a plurality of stair flights, wherein each stair platform is fixed to the side wall of the floating wind turbine platform, and each two adjacent stair platforms are connected by a stair flight; the retractable device is arranged on the stair platform at the bottom layer, and comprises a control box and a retractable mechanism, wherein the retractable mechanism comprises a retractable railing, wherein the outer end of the retractable railing is provided with a lifting lug; a retractable railing motor is arranged in the control box, wherein the retractable railing motor is a linear motor, wherein the output shaft of the retractable railing motor is fixedly connected to the retractable railing, and when the output shaft of the retractable railing motor moves forward, the retractable railing is extended, and when the output shaft of the retractable railing motor moves backward, the retractable railing is shortened. When the boarding personnel board the floating wind turbine platform from the maintenance ship, the telescopic railing motor is started to extend the telescopic railing outward; a hanging rope is passed through the lifting ear, the hanging rope is hung on the boarding personnel, and the boarding personnel is lifted to the telescopic mechanism by pulling the hanging rope; the boarding personnel walk to the stair platform at the bottom layer, and board the deck of the floating wind turbine platform through the fixed boarding ladder; when the boarding personnel return to the operation and maintenance ship from the deck of the floating wind turbine platform, the telescopic railing motor is started to extend the telescopic railing outward; the boarding personnel go down from the deck of the floating wind turbine platform to the stair platform at the bottom layer through the fixed boarding ladder, and then walk to the lifting ear of the telescopic mechanism; a hanging rope is passed through the lifting ear, the hanging rope is hung on the boarding personnel, and the boarding personnel reaches the operation and maintenance ship by lowering the hanging rope.

[0016] In addition, the present invention also has the following advantages: 1. The boarding ladder is retractable, the length can be adjusted, and the handrail angle can also be adjusted. The operation and maintenance ship can maintain a sufficient safe distance from the wind turbine platform for personnel to board, reducing the risk of collision and ensuring the safety of the operation and maintenance ship and the wind turbine platform; 2. The railing and ladder of the boarding ladder are two systems, which can be telescopically adjusted separately. When the personnel hang the lifting lugs and lift to the top, the ladder will be telescopically aligned with the railing, effectively preventing the personnel from colliding with the ladder due to shaking during the lifting process. At the same time, the anti-collision pad on the railing can also play a protective role; 3. After the personnel have completed the work and evacuated, the boarding ladder can be retracted into the storage box. When encountering severe sea conditions, it can prevent being hit by waves, reduce corrosion and increase service life; 4. After using the telescopic boarding ladder, there is no need to configure cranes and other equipment to lift the original fixed boarding ladder, which saves space resources and is more economical; 5. The telescopic boarding ladder is driven by a control motor, and the power source of the control motor is directly derived from the wind turbine power generation, which can realize the nearby consumption and storage of electric energy without the need for additional power supply; 6. The retractable boarding ladder has multiple sets of control devices. The boarding personnel are the main controllers. When it is inconvenient, the personnel on board or the personnel who have boarded the wind turbine platform can assist in the control to improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the unfolded state of the retractable embarkation device of the deep-sea floating wind turbine provided by Embodiment 1 of the present invention when in operation; Figure 2 yes Figure 1 A partial enlarged view of the telescopic device in FIG. Figure 3 It is a schematic diagram of the retractable embarkation device of the deep-sea floating wind turbine provided in Example 1 of the present invention in a folded state when not in operation.

[0018] Description of reference numerals: 100 - floating wind turbine platform; 1-fixed boarding ladder, 11-stair platform, 12-stair section, 13-diagonal brace, 14-guardrail; 2- telescopic device, 21- control box, 22- telescopic mechanism, 3- telescopic railing, 30- lifting lugs, 31- telescopic railing motor, 4- horizontal telescopic ladder, 41- horizontal telescopic ladder motor; 5-vertical rod, 50-roller, 51-telescopic guide rail; 6-parallelogram continuous frame; 7- Active shaft. DETAILED DESCRIPTION

[0019] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0020] Embodiment 1: A retractable boarding ladder Embodiment 1 provides a retractable boarding device, which is arranged on a deep-sea floating wind turbine. The structure thereof is described in detail below with reference to the accompanying drawings.

[0021] refer to Figure 1 The retractable boarding device of the deep-sea floating wind turbine is arranged on a floating wind turbine platform 100, and is characterized in that it includes a fixed boarding ladder 1 and a retractable device 2. The fixed boarding ladder 1 includes a plurality of stair platforms 11 and a plurality of stair steps 12. Each stair platform 11 is fixed to the side wall of the floating wind turbine platform 100. Each two adjacent stair platforms 11 are connected by a stair step 12. The telescopic device 2 is arranged on the stair platform 11 at the bottom layer, and includes a control box 21 and a telescopic mechanism 22. The telescopic mechanism 22 includes a telescopic railing 3, and a lifting lug 30 is arranged at the outer end of the telescopic railing 3; a telescopic railing motor 31 is arranged in the control box 21, and the telescopic railing motor 31 is a linear motor. The output shaft of the telescopic railing motor 31 is fixedly connected to the telescopic railing 3, and when the output shaft of the telescopic railing motor 31 moves forward, the telescopic railing 3 is extended, and when the output shaft of the telescopic railing motor 31 moves backward, the telescopic railing 3 is shortened.

[0022] When the passengers board the floating wind turbine platform 100 from the maintenance ship, the telescopic railing motor 31 is started to extend the telescopic railing 3 outward; a hanging rope is passed through the lifting ear 30, the hanging rope is hung on the passengers, and the passengers are lifted to the telescopic mechanism 22 by pulling the hanging rope; the passengers walk to the staircase platform 11 at the bottom and board the deck of the floating wind turbine platform 100 through the fixed boarding ladder 1; When the boarding personnel returns to the maintenance ship from the deck of the floating wind turbine platform 100, the telescopic railing motor 31 is started to extend the telescopic railing 3 outward; the boarding personnel go down from the deck of the floating wind turbine platform 100 to the stair platform 11 at the bottom layer through the fixed boarding ladder 1, and then walk to the lifting eye 30 of the telescopic mechanism 22; a hanging rope is passed through the lifting eye 30, and the hanging rope is hung on the boarding personnel, and the boarding personnel reaches the maintenance ship by lowering the hanging rope.

[0023] In order to facilitate passengers to stand, the telescopic mechanism 22 also includes a horizontal telescopic ladder 4. A horizontal telescopic ladder motor 41 is arranged in the control box 21. The horizontal telescopic ladder motor 41 is a linear motor. The output shaft of the horizontal telescopic ladder motor 41 is fixedly connected to the horizontal telescopic ladder 4. When the output shaft of the horizontal telescopic ladder motor 41 moves forward, the horizontal telescopic ladder 4 extends, and when the output shaft of the horizontal telescopic ladder motor 41 moves backward, the horizontal telescopic ladder 4 shortens.

[0024] Wherein, the horizontal telescopic ladder 4 is used to carry passengers.

[0025] In order to enhance the overall stability of the telescopic device 2, a vertical rod 5 is vertically arranged at the outer end of the telescopic railing 3, a roller 50 is arranged at the bottom of the vertical rod 5, and a telescopic guide rail 51 is arranged on the horizontal telescopic ladder 4. When the telescopic railing 3 and the horizontal telescopic ladder 4 are extended or shortened at the same time, the roller 50 at the bottom of the vertical rod just slides on the telescopic guide rail 51.

[0026] Among them, the roller 50 at the bottom of the vertical rod is limited on the telescopic guide rail 51, so that the telescopic guide rail 51 and the roller 50 at the bottom of the vertical rod form a limit, ensuring the stability of the telescopic railing 3 and the integrity of the horizontal telescopic ladder 4, and avoiding large shaking of the telescopic railing 3.

[0027] In order to reduce the damage caused by passengers accidentally bumping into the vertical rod 5, an anti-collision rubber pad is provided on the vertical rod 5.

[0028] In order to further increase the overall stability of the telescopic device 2, the telescopic mechanism 22 also includes at least one group of parallelogram continuous frames 6, which are formed by a plurality of parallelogram rod units hinged end to end, and the four nodes of each parallelogram rod unit are hingedly connected; the two ends of each group of parallelogram continuous frames 6 are respectively arranged on the box wall of the control box 21 and on the vertical rod 5.

[0029] When the telescopic railing 3 and the horizontal telescopic ladder 4 are extended or shortened at the same time, the parallelogram continuous frame 6 is respectively unfolded and retracted.

[0030] Preferably, the telescopic mechanism 22 includes two groups of telescopic railings 3, which are respectively located directly above the two sides of the horizontal telescopic ladder 4 of the telescopic mechanism 22, and a vertical rod 5 is vertically arranged at the outer end of each group of telescopic railings 3. The telescopic mechanism 22 includes two groups of parallelogram continuous frames 6, which are arranged on the box wall of the control box 21 and on both sides of the space between the vertical rods 5, and one end of the two groups of parallelogram continuous frames 6 is fixed to the box wall of the control box 21, and the other end is respectively fixed to the two vertical rods 5.

[0031] In order to ensure stability, the highest nodes and the lowest nodes of the corresponding parallelogram rod units of the two sets of parallelogram continuous frames 6 are connected by rods respectively.

[0032] In order to adjust the angle between the telescopic railing 3 and the horizontal line so as to enable the lifting ear 30 to hang the boarding personnel to move upward, an active rotating shaft 7 is provided at the connection between the telescopic railing motor 31 and the stair platform 11 at the bottom layer. When the active rotating shaft 7 is equipped with a rotating motor, when the rotating motor rotates, the telescopic railing 3 of the telescopic mechanism 22 moves upward, so that the lifting ear 30 hangs the boarding personnel to move upward, which can ensure that the operation and maintenance ship completes the boarding of personnel within a certain safe distance and reduce the risk of collision between the wind turbine platform and the operation and maintenance ship.

[0033] In order to enhance the bearing capacity of the stair platform 11 , diagonal braces 13 are disposed on the stair platform 11 .

[0034] Specifically, the plurality of stair platforms 11 include a plurality of floor platforms and a plurality of intermediate platforms, an intermediate platform is arranged between two adjacent floor platforms, adjacent intermediate platforms and floor platforms are staggered with each other, and the projections of all floor platforms on the sea surface overlap, the projections of all intermediate platforms on the sea surface overlap, and adjacent floor platforms and intermediate platforms are connected by a stair section 12.

[0035] In order to enhance protection, a guardrail 14 is provided on the stair platform 11 of the fixed boarding ladder 1 .

[0036] Specifically, the telescopic railing motor 31, the horizontal telescopic ladder motor 41 and the rotary motor are all arranged in the control box 21, and the control box 21 is also provided with a controller, and the controller is connected to the telescopic railing motor 31, the horizontal telescopic ladder motor 41 and the rotary motor respectively through wires.

[0037] Embodiment 2: A method for using a retractable boarding device Embodiment 2 provides a method for using a retractable boarding device, providing a retractable boarding device of embodiment 1, which is applicable to deep-sea floating wind turbines, and the method comprises the following steps: Step A: The boarding personnel board the deck of the floating wind turbine platform 100 from the maintenance vessel, including the following steps: Step A1: After the maintenance vessel reaches the designated area and maintains a sufficient safety distance from the floating wind turbine platform 100, the telescopic railing motor 31 is started to extend the telescopic railing 3 outward; Step A2: a hanging rope is passed through the lifting ear 30, the hanging rope is hung on the passenger, and the passenger is lifted to the telescopic mechanism 22 by pulling the hanging rope; Step A3: After the passengers have reached the top of the telescopic railing 3, the horizontal telescopic ladder motor 41 is started to drive the horizontal telescopic ladder 4 to extend, and at the same time, the roller 50 at the bottom of the vertical rod 5 slides in the telescopic guide rail 51 on the horizontal telescopic ladder 4, and the lengths of the telescopic railing 3 and the horizontal telescopic ladder 4 are adjusted during the process until the telescopic railing 3 and the horizontal telescopic ladder 4 are flush, and the passengers stand on the horizontal telescopic ladder 4; Step A4: The passengers walk to the staircase platform 11 at the bottom and board the deck of the floating wind turbine platform 100 via the fixed boarding ladder 1; Step A5: starting the telescopic railing motor 31 to shorten the telescopic railing 3 inward until it is completely retracted; Step B: The boarding personnel return to the operation and maintenance vessel from the deck of the floating wind turbine platform 100, including the following steps: Step B1: starting the telescopic railing motor 31 to extend the telescopic railing 3 outward; Step B2: The passengers go down from the deck of the floating wind turbine platform 100 to the staircase platform 11 at the bottom through the fixed boarding ladder 1, and then walk to the lifting lug 30 of the telescopic mechanism 22; Step B3: a hanging rope is passed through the lifting lug 30, and the hanging rope is hung on the boarding personnel. The boarding personnel is lowered by lowering the hanging rope. During this period, the telescopic railing motor 31 and the horizontal telescopic ladder motor 41 are started to adjust the length of the telescopic railing 3 and the horizontal telescopic ladder 4 until the telescopic railing 3 and the horizontal telescopic ladder 4 are flush, so that the boarding personnel can reach the operation and maintenance ship; Step B4: Start the telescopic railing motor 31 to shorten the telescopic railing 3 inwards until it is completely retracted.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A retractable boarding device for a deep-sea floating wind turbine, arranged on a floating wind turbine platform (100), characterized in that: include: A fixed boarding ladder (1) comprising a plurality of stair platforms (11) and a plurality of stair steps (12), wherein each stair platform (11) is fixed to a side wall of the floating wind turbine platform (100), and each two adjacent stair platforms (11) are connected via a stair step (12); The telescopic device (2) is arranged on the staircase platform (11) at the bottom layer, and comprises a control box (21) and a telescopic mechanism (22). The telescopic mechanism (22) comprises a telescopic railing (3). The outer end of the telescopic railing (3) is provided with a lifting lug (30). A telescopic railing motor (31) is arranged in the control box (21). The telescopic railing motor (31) is a linear motor. The output shaft of the telescopic railing motor (31) is fixedly connected to the telescopic railing (3). When the output shaft of the telescopic railing motor (31) moves forward, the telescopic railing (3) is extended. When the output shaft of the telescopic railing motor (31) moves backward, the telescopic railing (3) is shortened.

2. The retractable boarding device for deep sea floating wind turbine according to claim 1 is characterized in that: When the passengers board the floating wind turbine platform (100) from the maintenance ship, the telescopic railing motor (31) is started to extend the telescopic railing (3) outward; a hanging rope is passed through the lifting lug (30), the hanging rope is hung on the passengers, and the passengers are lifted to the telescopic mechanism (22) by pulling the hanging rope; the passengers walk to the staircase platform (11) at the bottom and board the deck of the floating wind turbine platform (100) via the fixed boarding ladder (1); When the boarding personnel returns to the maintenance ship from the deck of the floating wind turbine platform (100), the telescopic railing motor (31) is started to extend the telescopic railing (3) outward; the boarding personnel descend from the deck of the floating wind turbine platform (100) via the fixed boarding ladder (1) to the staircase platform (11) at the bottom, and then walk to the lifting eye (30) of the telescopic mechanism (22); a hanging rope is passed through the lifting eye (30), the hanging rope is hung on the boarding personnel, and the hanging rope is lowered to allow the boarding personnel to reach the maintenance ship.

3. The retractable boarding device for deep sea floating wind turbine according to claim 1 is characterized in that: The telescopic mechanism (22) further comprises a horizontal telescopic ladder (4). The control box (21) is provided with a horizontal telescopic ladder motor (41). The horizontal telescopic ladder motor (41) is a linear motor, the output shaft of the horizontal telescopic ladder motor (41) is fixedly connected to the horizontal telescopic ladder (4), and when the output shaft of the horizontal telescopic ladder motor (41) moves forward, the horizontal telescopic ladder (4) is extended, and when the output shaft of the horizontal telescopic ladder motor (41) moves backward, the horizontal telescopic ladder (4) is shortened; The horizontal telescopic ladder (4) is used to carry passengers.

4. The retractable boarding device for deep sea floating wind turbine according to claim 3 is characterized in that: A vertical rod (5) is vertically arranged at the outer end of the telescopic railing (3), and an anti-collision rubber pad is sleeved on the vertical rod (5); The bottom of the vertical rod (5) is provided with a roller (50), and the horizontal telescopic ladder (4) is provided with a telescopic guide rail (51). When the telescopic rail (3) and the horizontal telescopic ladder (4) are extended or shortened at the same time, the roller (50) at the bottom of the vertical rod just slides on the telescopic guide rail (51).

5. The retractable boarding device for deep sea floating wind turbine according to claim 4 is characterized in that: The telescopic mechanism (22) further comprises at least one set of parallelogram continuous frames (6). The parallelogram continuous frame (6) is formed by hingedly connecting a plurality of parallelogram rod units end to end in sequence, and the four nodes of each parallelogram rod unit are hingedly connected; The two ends of each set of parallelogram continuous frames (6) are respectively arranged on the wall of the control box (21) and on the vertical rod (5); When the telescopic railing (3) and the horizontal telescopic ladder (4) are extended or shortened simultaneously, the parallelogram continuous frame (6) is respectively expanded and retracted.

6. The retractable boarding device for deep sea floating wind turbine according to claim 4, characterized in that: A driving shaft (7) is provided at the connection between the telescopic handrail motor (31) and the stair platform (11) at the bottom. When the active rotating shaft (7) is provided with a rotating motor, when the rotating motor rotates, the telescopic railing (3) of the telescopic mechanism (22) moves upward, so that the lifting lug (30) on which the passengers are hung moves upward.

7. The retractable boarding device for deep sea floating wind turbine according to claim 1, characterized in that: The staircase platforms (11) are all provided with diagonal braces (13).

8. The retractable boarding device for deep sea floating wind turbine according to claim 1, characterized in that: The plurality of stair platforms (11) include a plurality of floor platforms and a plurality of intermediate platforms, an intermediate platform is arranged between two adjacent floor platforms, adjacent intermediate platforms and floor platforms are staggered with each other, and the projections of all floor platforms on the sea surface overlap, the projections of all intermediate platforms on the sea surface overlap, and adjacent floor platforms and intermediate platforms are connected via a staircase (12).

9. The retractable boarding device for deep sea floating wind turbine according to claim 1, characterized in that: A guardrail (14) is provided on the staircase platform (11) of the fixed boarding ladder (1).

10. The method for using the retractable boarding device for deep sea floating wind turbines according to any one of claims 1 to 9, characterized in that: include Step A: The boarding personnel board the deck of the floating wind turbine platform (100) from the maintenance vessel, including the following steps: Step A1: After the maintenance vessel reaches the designated area and maintains a sufficient safety distance from the floating wind turbine platform (100), the telescopic railing motor (31) is started to extend the telescopic railing (3) outward; Step A2: inserting a hanging rope through the lifting ear (30), hanging the hanging rope on the passenger, and pulling the hanging rope to lift the passenger to the telescopic mechanism (22); Step A3: After the passenger reaches the top of the telescopic railing (3), the horizontal telescopic ladder motor (41) is started to drive the horizontal telescopic ladder (4) to extend, and at the same time, the roller (50) at the bottom of the vertical rod (5) slides in the telescopic guide rail (51) on the horizontal telescopic ladder (4), and the length of the telescopic railing (3) and the horizontal telescopic ladder (4) are adjusted until the telescopic railing (3) and the horizontal telescopic ladder (4) are flush, and the passenger stands on the horizontal telescopic ladder (4); Step A4: The boarding personnel walk to the staircase platform (11) at the bottom and board the deck of the floating wind turbine platform (100) via the fixed boarding ladder (1); Step A5: starting the telescopic railing motor (31) to shorten the telescopic railing (3) inwards until it is completely retracted; Step B: The boarding personnel return to the operation and maintenance vessel from the deck of the floating wind turbine platform (100), including the following steps: Step B1: starting the telescopic railing motor (31) to extend the telescopic railing (3) outward; Step B2: The passengers descend from the deck of the floating wind turbine platform (100) via the fixed boarding ladder (1) to the staircase platform (11) at the bottom, and then walk to the lifting lug (30) of the telescopic mechanism (22); Step B3: a hanging rope is passed through the lifting lug (30), the hanging rope is hung on the boarding personnel, and the boarding personnel is lowered by lowering the hanging rope. During this time, the telescopic handrail motor (31) and the horizontal telescopic ladder motor (41) are started to adjust the length of the telescopic handrail (3) and the horizontal telescopic ladder (4) until the telescopic handrail (3) and the horizontal telescopic ladder (4) are flush, so that the boarding personnel can reach the operation and maintenance vessel; Step B4: starting the telescopic railing motor (31) to shorten the telescopic railing (3) inwards until it is completely retracted.

Images