A ladder and maintenance vessel

Abstract

This application provides a ladder and a maintenance vessel, relating to the field of wind power operation and maintenance technology. The ladder includes: a sliding connection portion on the ladder body; a magnetic suction component disposed at one end of the ladder body opposite to the sliding connection portion, used for connection to the hull; and an anti-capsulation component slidably connected to the sliding connection portion, and used for mounting on the berthing hull. This application achieves a stable connection between the ladder body and the hull through the connection of the magnetic suction component, preventing relative slippage between the ladder body and the hull deck. The anti-capsulation component allows the ladder body to adaptively slide along its extension direction as it floats with the hull, and also provides lateral restraint to the sliding connection portion, effectively limiting the tendency of the ladder body to tilt towards the hull, thereby improving the safety of boarding the vessel.

Description

Technical Field

[0001] This application relates to the field of wind power operation and maintenance technology, and in particular to a ladder and maintenance vessel. Background Technology

[0002] When a vessel (such as a maintenance vessel) berths on a mooring body (such as a dock or berthing bollard), it is necessary to use a ladder to board and disembark due to the height difference between the vessel's deck and the dock or berthing bollard.

[0003] In the existing technology, the ladder is a straight ladder, with one end set on the deck of the ship and the other end resting on the dock or mooring bollard. In addition, a person is required to hold the ladder so that the operators can go up and down the ship from the ladder.

[0004] However, the aforementioned hull is prone to swaying due to the tides, which can cause the ladder to slip off the deck and even cause the ladder to overturn, posing a safety risk. Utility Model Content

[0005] This application provides a ladder and maintenance vessel to solve the problem that existing vessels are prone to swaying due to tides, causing the ladder to slip off the deck and even capsize, posing a safety risk.

[0006] To achieve the above objectives, the technical solution of this application is as follows:

[0007] This application provides a ladder, comprising: a ladder body having a sliding connection portion; a magnetic member disposed at one end of the ladder body away from the sliding connection portion, the magnetic member being used to connect with a hull; and an anti-capsulation component slidably connected to the sliding connection portion and disposed on a mooring body; the anti-capsulation component is configured to slide relative to the sliding connection portion along the extension direction of the ladder body when the hull is floating, and to restrict the ladder body from tilting toward the hull.

[0008] In one possible implementation, the ladder in this embodiment includes a capsizing component comprising a cable, a movable ring, and a fixed post. The movable ring is sleeved on the fixed post and slides relative to the fixed post. One end of the cable is fixedly connected to a sliding connection, and the other end of the cable is fixedly connected to the movable ring. The movable ring is configured to slide relative to the fixed post when the hull floats and causes the sliding connection to float.

[0009] In one possible implementation, the ladder in this embodiment has at least two sliding connection parts, which are spaced apart along the width direction of the ladder body. The anti-tipping component is used to connect with at least one sliding connection part.

[0010] In one possible implementation, the sliding connection of the ladder in this embodiment is a pull lug.

[0011] In one possible implementation, the ladder in this embodiment of the application further includes a fixing ring. The ladder body includes at least two ladder posts and at least one step. The two ladder posts are spaced apart and connected by the step. The fixing ring is used to be set on the side of the mooring body facing the ladder body. Part of the ladder post is inserted into the fixing ring, and the fixing ring is slidably connected to the ladder post.

[0012] In one possible implementation, the ladder in this application embodiment includes a magnetic suction cup, a first connecting part and a second connecting part. The first connecting part is disposed on the magnetic suction cup, the ladder body is inserted into the first connecting part, and the second connecting part is inserted into the ladder body via the first connecting part. The magnetic suction cup is used for detachable connection with the hull.

[0013] In one possible implementation, the ladder in this application embodiment has a first connecting part including two first connecting plates, the ladder body being inserted between the two first connecting plates, the first connecting plates having first connecting holes, and the second connecting part being connected to the ladder body via the first connecting holes.

[0014] In one possible implementation, the ladder in this embodiment of the application further includes a switch, which is electrically connected to the magnetic chuck and is used to control the magnetic chuck to magnetically connect or disconnect from the hull.

[0015] In one possible implementation, the ladder in this embodiment of the application further includes a collision protection member disposed on the side of the ladder body facing the mooring body.

[0016] In addition, this application also provides a maintenance vessel, including a hull and a ladder as described in any of the above embodiments, which is installed on the hull.

[0017] This application provides a ladder and maintenance vessel, comprising: a ladder body having a sliding connection portion; a magnetic suction member disposed at one end of the ladder body away from the sliding connection portion, the magnetic suction member being used to connect with the hull; and an anti-capsulation component slidably connected to the sliding connection portion and disposed on a mooring body; the anti-capsulation component is configured to slide relative to the sliding connection portion along the extension direction of the ladder body when the hull is floating, and to restrict the ladder body from tilting toward the hull. This application achieves a stable connection between one end of the ladder body and the hull through the magnetic connection, preventing relative slippage between the ladder body and the hull deck. The anti-capsulation component is set on the berthing body and forms a sliding engagement with the sliding connection part of the ladder body. This allows the ladder body to slide adaptively along the extension direction of the ladder body when the hull floats, satisfying the floating displacement compensation of the ladder body when the hull floats. At the same time, the anti-capsulation component provides tension to the sliding connection part, laterally limiting the sliding connection part and effectively restricting the tendency of the ladder body to tilt towards the hull, thereby improving the safety of boarding the hull. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] Figure 1 This is a schematic diagram of the structure connecting the ladder to the hull provided in an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the connection between the ladder body and the magnetic suction component in an embodiment of this application.

[0021] Explanation of reference numerals in the attached figures:

[0022] 10-Mooring body; 20-Hull; 100-Ladder body; 110-Sliding connection; 120-Ladder column; 130-Step; 200-Magnetic suction component; 210-Magnetic suction cup; 220-First connection; 221-First connection plate; 230-Second connection; 240-Switch component; 300-Anti-overturning component; 310-Cable; 320-Moving ring; 330-Fixed column; 340-Fixed ring; 400-Collision-resistant component.

[0023] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed herein.

[0025] It should be noted that in the description of the embodiments of this application, the terms "upper", "lower", "inner", "outer" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and are not intended to indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this application.

[0026] Furthermore, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "fixation," etc., 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, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between 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.

[0028] In the existing technology, the ladder is a straight ladder, with one end set on the deck of the ship and the other end resting on the dock or mooring bollard. In addition, a person is required to hold the ladder so that the operators can go up and down the ship from the ladder.

[0029] However, the aforementioned hull is prone to swaying due to tides, causing the ladder to slip against the deck and even potentially capsize, posing a safety risk. It's understandable that the ladder and deck are only positioned relative to each other through static friction at their contact surfaces, without a dedicated fixing structure. Because the hull is affected by tides and currents, it floats up and down, making the friction between the ladder and deck insufficient to resist this relative movement, thus leading to slippage.

[0030] Furthermore, the ladder is supported only by one end abutting against the berth and the other end resting on the deck, resulting in a cantilevered stress state and a lack of restraint structure to limit its lateral tilting. When the hull sways significantly or there is relative displacement between the ladder and the berth, the ladder is prone to capsizing to the side away from the berth (such as towards the edge of the hull deck).

[0031] In view of this, this application provides a ladder and a maintenance vessel. The ladder includes: a ladder body having a sliding connection portion; a magnetic suction member disposed at one end of the ladder body away from the sliding connection portion, the magnetic suction member being used to connect with the hull; and an anti-capsulation component slidably connected to the sliding connection portion and disposed on a mooring body. The anti-capsulation component is configured to slide relative to the sliding connection portion along the extension direction of the ladder body when the hull is floating, and to restrict the ladder body from tilting toward the hull. This application achieves a stable connection between one end of the ladder body and the hull through the magnetic connection, preventing relative slippage between the ladder body and the hull deck. The anti-capsule component is set on the berthing body and forms a sliding engagement with the sliding connection part of the ladder body. This allows the ladder body to slide adaptively along its own extension direction when the hull floats, satisfying the floating displacement compensation of the ladder body when the hull floats. At the same time, the anti-capsule component provides tension to the sliding connection part, laterally limiting the sliding connection part and effectively restricting the tendency of the ladder body to tilt towards the hull, thereby improving the safety of boarding the hull.

[0032] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0033] This application provides a ladder for boarding maintenance vessels, combined with... Figure 1 and Figure 2 The ladder includes: a ladder body 100 having a sliding connection portion 110; a magnetic suction member 200 disposed at one end of the ladder body 100 away from the sliding connection portion 110, the magnetic suction member 200 being detachably connected to the hull 20; and an anti-capsulation component 300 slidably connected to the sliding connection portion 110 and disposed on the mooring body 10. The anti-capsulation component 300 is configured to slide relative to the sliding connection portion 110 along the extending direction of the ladder body 100 when the hull 20 is floating, and to restrict the ladder body 100 from tilting toward the hull 20.

[0034] The ladder body 100 provides a passage for operators to board and disembark from the hull 20. The ladder body 100 is a long strip structure that extends along the boarding path. A sliding connection portion 110 extending along the length direction is formed on the outer wall of one end of the ladder body 100. The sliding connection portion 110 is either a convex strip or a sliding groove provided on the ladder body 100.

[0035] A magnetic suction component 200 is fixedly installed at one end of the ladder body 100 away from the sliding connection portion 110, for magnetic attraction to the deck surface of the hull 20. One end of the ladder body 100 is connected to the deck of the hull 20 via the magnetic suction component 200, so that when the hull 20 is moored on the berthing body 10, the ladder body 100 is fixed to the hull 20, allowing the ladder body 100 to move synchronously with the floating of the hull 20, preventing relative slippage between the ladder body 100 and the hull 20. The other end of the ladder body 100 rests against the berthing body 10, and the sliding connection portion 110 on the ladder body 100 is connected to the berthing body 10 via an anti-overturning component 300, thereby limiting the tendency of the ladder body 100 to tilt toward the hull 20 and preventing the ladder body 100 from capsizing.

[0036] like Figure 1 As shown, the anti-capsulation component 300 allows the ladder body 100 to float while preventing it from tilting towards the hull 20 and causing over-tilting. The anti-capsulation component 300 moves relative to the sliding connection 110, allowing the ladder body 100 to move freely along its extension direction. When the magnetic suction end 200 of the ladder body 100 floats with the hull 20, the ladder body 100 slides relative to the anti-capsulation component 300 through the sliding connection 110, compensating for the relative height change between the hull and the mooring body 10. When the ladder body 100 is subjected to lateral loads such as wind and waves, generating a capsulating moment towards the hull 20, the anti-capsulation component 300 provides lateral restraint to the ladder body 100, such as providing tension to prevent the ladder body 100 from capsizing.

[0037] This application does not limit the position of the anti-tipping component 300. For example, the anti-tipping component 300 may be located directly in front of the ladder body 100 or diagonally in front of the ladder body 100. Here, "front" refers to the side of the ladder body 100 facing the mooring body 10.

[0038] The anti-rollover component 300 includes a cable 310, a movable ring 320, and a fixing post 330, such as... Figure 1 As shown, the movable ring 320 is sleeved on the fixed post 330 and slides relative to the fixed post 330. One end of the cable 310 is fixedly connected to the sliding connection part 110, and the other end of the cable 310 is fixedly connected to the movable ring 320. The movable ring 320 is configured to slide relative to the fixed post 330 when the hull 20 floats and drives the sliding connection part 110 to float.

[0039] The cable 310 is used to adjust the distance between the ladder body 100 and the fixed column 330. For example, the fixed column 330 is a foundation pile installed on the dock. The distance between the foundation pile and the hull 20 may vary between different docks. Therefore, the cable 310 can be adjusted to make an adaptive adjustment, which is simple and convenient.

[0040] The movable ring 320 is fitted onto the fixed post 330 and is used to move relative to the fixed post 330 along the extension direction of the fixed post 330. On the one hand, the movable ring 320 is circumferentially constrained by the fixed post 330, preventing the cable 310 from generating a horizontal swing angle. The tilting force of the ladder body 100 is converted into lateral pressure of the movable ring 320 on the fixed post 330 through the cable 310. On the other hand, when the hull 20 floats and causes the ladder body 100 to move vertically, the cable 310 pulls the movable ring 320 to slide synchronously along the fixed post 330.

[0041] In one possible implementation, the ladder in this application embodiment has at least two sliding connection parts 110, and the at least two sliding connection parts 110 are spaced apart along the width direction of the ladder body 100. The anti-tipping component 300 is used to connect with at least one sliding connection part 110.

[0042] Two sliding connection portions 110 are respectively disposed on the left and right sides of the ladder body 100, and are located on the ladder column 120 of the ladder body 100. The extending direction of the sliding connection portion 110 is parallel to the extending direction of the ladder body 100. The anti-tipping component 300 is used to connect to at least one sliding connection portion 110, such as a cable 310 connecting one sliding connection portion 110, or two cables 310 respectively connecting two sliding connection portions 110 one-to-one. Alternatively, there may be at least two anti-tipping components 300, with one anti-tipping component 300 corresponding to one sliding connection portion 110, to enhance the stability of the ladder body 100.

[0043] The sliding connection 110 is a pull lug. The pull lug is welded or screwed onto the ladder body 100. The cable 310 is wound around the pull lug. When the ladder body 100 floats, it moves the pull lug, which in turn moves the cable 310, causing the movable ring 320 to move relative to the fixed post 330. This application uses the pull lug to provide a fulcrum for the cable 310, which supports and guides the cable 310, preventing it from detaching or shifting randomly during movement, thus ensuring the stability and reliability of the cable 310's movement.

[0044] In one possible implementation, the ladder in this embodiment of the application further includes a fixing ring 340. The ladder body 100 includes at least two ladder posts 120 and at least one step 130. The two ladder posts 120 are spaced apart and connected by the step 130. The fixing ring 340 is used to be set on the side of the mooring body 10 facing the ladder body 100. Part of the ladder posts 120 are inserted into the fixing ring 340, and the fixing ring 340 is slidably connected to the ladder posts 120.

[0045] This application uses a retaining ring 340 to further limit the movement of the ladder body 100, preventing it from tipping or tilting. The retaining ring 340 is located on the side of the mooring body 10 facing the ladder body 100, and is detachably connected to the mooring body 10, for example, by magnetic attraction. The inner diameter of the retaining ring 340 is larger than the outer diameter of the ladder column 120, allowing the ladder column 120 to be inserted into it. The annular structure of the retaining ring 340 provides circumferential restraint to the ladder column 120, preventing it from tilting or tipping.

[0046] In this application, the magnetic connector 200 is used for detachable connection with the deck of the hull 20. When it is necessary to board or disembark from the hull 20, the magnetic connector 200 is magnetically connected to the hull 20, thereby fixing the ladder body 100 to the deck of the hull 20. When it is not necessary to board or disembark from the hull 20, such as when the hull 20 leaves the dock, the magnetic connector 200 is disengaged from the hull 20, and the ladder body 100 is disengaged from the berthing body 10, thus avoiding occupying the deck space of the hull 20 and obstructing normal navigation.

[0047] This application does not limit the number of magnetic components 200. For example, there may be two magnetic components 200, each corresponding to one of the two ladder posts 120 of the ladder body 100, thereby enhancing the reliability of the connection. Alternatively, there may be only one magnetic component 200, located at the center of the ladder body 100 along its width, connected to the step 130 of the ladder body 100.

[0048] In one possible implementation, the ladder in this embodiment includes a magnetic suction component 200 comprising a magnetic suction cup 210, a first connecting portion 220, and a second connecting portion 230. The first connecting portion 220 is disposed on the magnetic suction cup 210, and the ladder body 100 is inserted into the first connecting portion 220. The second connecting portion 230 is inserted into the ladder body 100 via the first connecting portion 220. The magnetic suction cup 210 is used for detachable connection with the hull 20.

[0049] The first connecting part 220 is integrally formed on one end face of the magnetic chuck 210, and the interior of the first connecting part 220 forms an insertion space that matches the outer contour of the ladder column 120 of the ladder body 100. The end of the ladder column 120 is inserted axially into the insertion space, so that the ladder body 100 and the first connecting part 220 form a preliminary fit. The second connecting part 230 is a columnar structure, one end of which passes through the side wall of the first connecting part 220 and is inserted into the corresponding position of the ladder body 100, thereby further fixing the ladder body 100 and the first connecting part 220. The end face of the magnetic chuck 210 facing away from the first connecting part 220 is used to contact the corresponding magnetic surface of the hull 20, realizing a detachable connection between the hull 20 and the magnetic chuck 210.

[0050] This application achieves a stable connection between the ladder body 100 and the magnetic suction cup 210 through the cooperation of the first connecting part 220 and the second connecting part 230, ensuring that the ladder body 100 does not shift relative to the magnetic suction cup 200 during use. Simultaneously, the detachable connection between the magnetic suction cup 210 and the hull 20 allows the ladder to be flexibly installed in different positions on the hull 20 or removed from the hull 20 according to usage requirements, improving the ladder's applicability and flexibility.

[0051] In one possible implementation, the ladder in this embodiment includes two first connecting plates 221, such as... Figure 2 As shown, the ladder body 100 is inserted between two first connecting plates 221. The first connecting plate 221 has a first connecting hole, and the second connecting part 230 is connected to the ladder body 100 through the first connecting hole.

[0052] Two first connecting plates 221 are parallel to each other and spaced apart. Both first connecting plates 221 are perpendicularly disposed on the same side surface of the magnetic chuck 210, and the distance between them is adapted to the thickness of the ladder body 100. The end of the ladder body 100 is inserted into the gap between the two first connecting plates 221. Each first connecting plate 221 has a first connecting hole extending through its thickness direction, and the axes of the two first connecting holes are collinear. The second connecting part 230 is a rod-shaped or column-shaped structure. The second connecting part 230 passes sequentially through the first connecting hole of one of the first connecting plates 221, the corresponding through hole on the ladder body 100, and the first connecting hole of the other first connecting plate 221, thus achieving connection with the ladder body 100. The second connecting part 230 can be a connecting pin.

[0053] The clamping structure formed by the two first connecting plates 221 can laterally limit the ladder body 100, effectively preventing the ladder body 100 from swaying laterally when subjected to force, and improving the stability of the connection between the ladder body 100 and the magnetic suction member 200.

[0054] In one possible implementation, the ladder in this embodiment of the application further includes a switch 240, such as... Figure 2 As shown, the switch 240 is electrically connected to the magnetic chuck 210, and the switch 240 is used to control the magnetic chuck 210 to magnetically connect or disconnect from the hull 20.

[0055] The switch 240 is an electrically controlled component and can be electrically connected to the magnetic chuck 210 via a wire. The switch 240 can be disposed on the side wall of the magnetic chuck 210 or on the first connecting portion 220, and has two states: on and off. When the switch 240 is in the on state, the magnetic chuck 210 is energized, generating magnetic force, which allows it to form a magnetic connection with the metal surface of the hull 20; when the switch 240 is in the off state, the magnetic chuck 210 is de-energized, the magnetic force disappears, and the magnetic connection with the hull 20 is released. It is understood that the magnetic chuck 200 can have its own internal power source, or it can obtain power through an electrical connection to a generator inside the hull 20 via a wire; this application does not impose any limitations on this.

[0056] In one possible implementation, the ladder in this embodiment of the application further includes a collision protection member 400, which is disposed on the side of the ladder body 100 facing the mooring body 10.

[0057] The anti-collision component 400 is a component with cushioning properties, such as a rubber pad, and has an overall elongated structure. The anti-collision component 400 is fixed to the surface of the ladder body 100 facing the mooring body 10 by bolts or adhesive, in order to reduce the wear of the ladder body 100, thereby protecting the ladder body 100 and extending its service life.

[0058] In addition, this application also provides a maintenance vessel, including a hull 20 and a ladder as described in any of the above embodiments, which is installed on the hull 20.

[0059] This application does not restrict the type of maintenance vessel, such as those used in wind power maintenance. The maintenance vessel includes a hull 20 with a deck. The ladder is detachably connected to the deck via a magnetic connector 200. When in use, the ladder is magnetically attached to the deck via the magnetic connector 200, allowing the ladder to be flexibly adjusted in position according to operational needs without the need for pre-drilled mounting holes on the deck, thus avoiding damage to the hull 20. At the same time, when not in use, the magnetic connector 200 is detached from the deck, preventing long-term exposure and avoidance of deck space occupation or ladder damage due to wind, waves, or collisions during navigation.

[0060] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0061] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.

Claims

1. A ladder, characterized in that include: A ladder body, wherein the ladder body has a sliding connection part; A magnetic suction component is disposed at one end of the ladder body away from the sliding connection portion, and the magnetic suction component is used for detachable connection with the hull. An anti-rollover assembly is slidably connected to the sliding connection portion, and the anti-rollover assembly is used to be mounted on the mooring body; The anti-capsizing component is configured to slide relative to the sliding connection along the extension direction of the ladder body when the hull is floating, and to prevent the ladder body from tilting toward the hull.

2. The ladder according to claim 1, characterized in that, The anti-capsizing component includes a cable, a movable ring, and a fixed post. The movable ring is sleeved on the fixed post and slides relative to the fixed post. One end of the cable is fixedly connected to the sliding connection part, and the other end of the cable is fixedly connected to the movable ring. The movable ring is configured to slide relative to the fixed post when the hull floats and causes the sliding connection part to float.

3. The ladder stand of claim 2, wherein, The number of sliding connection parts is at least two, and the at least two sliding connection parts are spaced apart along the width direction of the ladder body. The anti-tipping component is used to connect with at least one of the sliding connection parts.

4. Ladder according to any one of claims 1-3, characterized in that The sliding connection part is a pull lug.

5. The ladder of any one of claims 1-3, wherein, The anti-tipping component also includes a fixing ring. The ladder body includes at least two ladder columns and at least one step. The two ladder columns are spaced apart and connected by the step. The fixing ring is used to be located on the side of the mooring body facing the ladder body. Part of the ladder column is inserted into the fixing ring, and the fixing ring is slidably connected to the ladder column.

6. The ladder of any one of claims 1-3, wherein, The magnetic suction component includes a magnetic suction cup, a first connecting part, and a second connecting part. The first connecting part is disposed on the magnetic suction cup, and the ladder body is inserted into the first connecting part. The second connecting part is inserted into the ladder body via the first connecting part. The magnetic suction cup is used for detachable connection with the hull.

7. The ladder stand of claim 6, wherein, The first connecting part includes two first connecting plates, the ladder body is inserted between the two first connecting plates, the first connecting plates have first connecting holes, and the second connecting part is connected to the ladder body through the first connecting holes.

8. The ladder stand of claim 6, wherein, The magnetic chuck also includes a switch, which is electrically connected to the magnetic chuck and is used to control the magnetic chuck to magnetically connect or disconnect from the hull.

9. The ladder of any one of claims 1-3, wherein, The ladder also includes a collision protection device, which is disposed on the side of the ladder body facing the mooring body.

10. A service vessel, characterized in that Includes the hull and the ladder of any one of claims 1-9 provided on the hull.

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