Ship

The shipboard water ladder release and storage mechanism addresses the challenge of safely transitioning between water ladders and gangways by allowing adjustable positioning, enhancing safety and efficiency in shipboard operations.

CN223100950UActive Publication Date: 2025-07-15SHANGHAI MERCHANT SHIP DESIGN & RES INST
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Patent Information

Application Number
CN202421859165.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-02
Publication Date
2025-07-15
Estimated Expiration
2034-08-02

AI Technical Summary

Technical Problem

In the prior art, the connection between the water diversion ladder and the gangway requires manual adjustment, which poses safety risks and is laborious, especially in the case of freeboards of different ships.

Method used

The water diversion soft ladder release storage device is adopted to adjust the release position of the water diversion soft ladder through the frame and the release winding mechanism, and combine the track and ratchet components to ensure the connection between the water diversion soft ladder and the gangway, achieving automated control and safe transition.

Benefits of technology

The safe connection between the water diversion ladder and the gangway is achieved, reducing the physical energy consumption of crew members, ensuring the safe transition of the water diversion ladder under different ship freeboard situations, and avoiding the interference between the water diversion ladder and the gangway.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of ships, and discloses a ship which comprises a deck, a water diversion rope ladder releasing and containing device, a water diversion rope ladder and a gangway ladder, the water diversion rope ladder releasing and containing device is provided with a rack and a releasing and rolling mechanism installed on the rack so as to release and roll the water diversion rope ladder, and the rack can move relative to the deck. Therefore, when the freeboard of the ship is smaller than 9 meters, a pilot can directly use the water diversion rope ladder to boarding the ship, when the freeboard of the ship is larger than 9 meters, the pilot can firstly use the water diversion rope ladder and then transit to the accommodation ladder to boarding the ship, and the personal safety of the pilot is guaranteed.
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Description

Technical field

[0001] The utility model relates to the technical field of ships, in particular to a ship. Background technique

[0002] When a ship is approaching or leaving a dock, passing through a ship lock or a restricted water area, a pilot who is familiar with the local hydrological conditions needs to board the ship to assist in guiding the ship to sail normally. When the pilot boards the ship, he often needs to rely on a pilot ladder and leave the ship by means of the pilot ladder after completing the task. According to the International Convention for the Safety of Life at Sea, when the freeboard of the ship (i.e., the height of the deck above the water surface) is less than 9 meters, the pilot can directly climb the pilot ladder to board the ship. When the freeboard of the ship is greater than 9 meters, to ensure the safety of the pilot, the pilot needs to first climb a 9-meter-high pilot ladder and then transfer to the ship's accommodation ladder to board the ship.

[0003] In the prior art, the accommodation ladder is usually rotatably installed on the side of the deck (one side of the deck in the width direction of the ship) around a horizontal axis. Generally, the accommodation ladder is fixed to the deck through a support frame. When it is necessary to climb the accommodation ladder, first untie the accommodation ladder, and then rotate the accommodation ladder downward to the destination to facilitate the pilot to climb. To ensure that the pilot can smoothly and safely transition from the pilot ladder to the accommodation ladder, it is necessary to rotate the boarding opening of the accommodation ladder downward to one side of the pilot ladder. During the process of lowering the accommodation ladder, when the accommodation ladder rotates at different angles, the height position of the boarding opening of the accommodation ladder and its position in the length direction of the ship are different.

[0004] In the case where the freeboard of the ship is greater than 9 meters and the accommodation ladder needs to be used in combination, for different freeboards of the ship, it is necessary to adjust the rotation angle of the accommodation ladder and the release position of the pilot ladder to ensure that the boarding opening of the accommodation ladder is connected to the pilot ladder. Since the installation position of the accommodation ladder is relatively fixed and its rotation adjustment is usually performed by a special device, generally, the crew needs to adjust the release position of the pilot ladder to ensure that the pilot ladder is connected to the boarding opening of the accommodation ladder while avoiding the pilot ladder interfering with the lower part of the accommodation ladder. The weight of the pilot ladder is usually 60-70 kg, which is laborious to carry and is also likely to injure people, presenting a relatively large potential safety hazard. Content of the utility model

[0005] The purpose of the utility model is to provide a ship that can release and wind up the pilot ladder by using a pilot ladder release and storage device and can adjust the release position of the pilot ladder. When facing different freeboards of the ship, it can adaptively adjust the release position of the pilot ladder to avoid interference between the pilot ladder and the accommodation ladder while ensuring that the boarding opening of the accommodation ladder is connected to the pilot ladder, so as to facilitate the pilot to board the accommodation ladder from the pilot ladder.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A ship comprises a deck, a pilot ladder and a gangway, wherein the gangway is rotatably mounted on the ship side of the deck and has a storage position in a horizontal state and a climbing position in an inclined state, and the ship also comprises a pilot ladder releasing and storing device, and the pilot ladder releasing and storing device comprises:

[0008] a rack, the rack being movably arranged on the deck;

[0009] The release and reeling mechanism includes a rotating shaft and a driver. The rotating shaft is rotatably arranged on the frame. One end of the water ladder is fixedly connected to the rotating shaft and wound around the rotating shaft. The driver can drive the rotating shaft to rotate to release or reel the water ladder.

[0010] Optionally, the water ladder releasing and storing device also includes a track, which extends along the length direction of the ship and is fixed on the deck, and the frame cooperates with the track and can move along the track.

[0011] Optionally, the frame includes a base plate and wheels rotatably mounted on the base plate, and the wheels are in rolling cooperation with the tracks.

[0012] Optionally, the track includes:

[0013] A first limiting position, wherein a vertical distance D1 between the first limiting position and the rotating part of the gangway ladder is greater than a vertical distance D2 between the ladder opening of the gangway ladder in the storage position and the rotating part;

[0014] The second limiting position, the vertical distance D3 between the second limiting position and the rotating part is not greater than the vertical distance D4 between the ladder opening at the ladder climbing position and the rotating part.

[0015] Optionally, the frame further includes a stand fixed on the bottom plate, and the rotating shaft is rotatably mounted on the stand and is located above the bottom plate.

[0016] Optionally, the frame further includes a limiting member, which is fixed on the vertical frame and spaced apart from and parallel to the rotating shaft, and a spacing portion for the water ladder to pass through is provided between the limiting member and the bottom plate.

[0017] Optionally, the release and reeling mechanism further includes a ratchet assembly, and the ratchet assembly includes:

[0018] A ratchet wheel, the ratchet wheel is coaxially connected to one end of the rotating shaft;

[0019] A pawl and an elastic member, wherein the pawl is movably mounted on the frame through the elastic member, and the elastic member is used to maintain the pawl at a position abutting against the ratchet teeth of the ratchet wheel.

[0020] Optionally, the ratchet assembly further comprises a toggle member, which is fixedly connected to the pawl, and the toggle member can be toggled so that the pawl is disengaged from the ratchet teeth of the ratchet and compresses the elastic member.

[0021] Optionally, the ratchet assembly further includes:

[0022] A crank, which includes a fixed part and a handle part connected to each other. The fixed part is coaxially and fixedly connected to the ratchet or the rotating shaft, and the handle part is for an operator to hold.

[0023] Optionally, the ratchet assembly further includes an unlocker, which is used to drive the toggling member to move, so that the pawl disengages from the ratchet teeth of the ratchet and compresses the elastic member.

[0024] Compared with the prior art, the beneficial effects of the present utility model are as follows: The ship adjusts the release position of the pilot ladder through the pilot ladder release and storage device that can move relative to the deck, saving the physical strength of the crew. At the same time, the pilot ladder can be matched with the gangway on the ship's side that is rotatably installed on the deck through the rotating part. Thus, when the freeboard of the ship is less than 9 meters, the pilot can directly board the ship using the pilot ladder, and when the freeboard of the ship is greater than 9 meters, the pilot can first use the pilot ladder and then transition to the gangway to board the ship, ensuring the personal safety of the pilot. Description of the Drawings

[0025] Figure 1 is a top view structural schematic diagram of the ship provided by the embodiment of the present utility model;

[0026] Figure 2 is a side view structural schematic diagram of the ship provided by the embodiment of the present utility model;

[0027] Figure 3 is a structural schematic diagram of the cooperation between the pilot ladder release and storage device and the pilot ladder provided by the embodiment of the present utility model;

[0028] Figure 4 is a structural schematic diagram of the cooperation between the pilot ladder release and storage device and the pilot ladder after removing the housing provided by the embodiment of the present utility model;

[0029] Figure 5 is Figure 4 a partial enlarged view of part A in

[0030] In the figure:

[0031] 100, pilot ladder;

[0032] 200, ship side;

[0033] 300, gangway; 301, rotating part; 302, boarding opening;

[0034] 1, frame; 11, bottom plate; 12, vertical frame; 13, limiting member;

[0035] 2. Release and winding mechanism; 21. Rotating shaft; 22. Driver; 23. Control unit; 24. Input unit; 25. Ratchet assembly; 251. Ratchet; 252. Pawl; 253. Elastic member; 254. Poking member; 255. Unlocker; 256. Crank handle;

[0036] 31. Wheel; 32. Locking part;

[0037] 4. Track; 41. First limiting position; 42. Second limiting position. Detailed implementation mode

[0038] The following further elaborates on the present utility model in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0039] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0041] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0042] Figure 1The figure shows a top - view structural schematic diagram of a ship provided by an embodiment of the present utility model. Figure 2 The figure shows a side - view structural schematic diagram of a ship provided by an embodiment of the present utility model. As Figures 1 to 2 shown, the ship includes a deck, a pilot ladder 100, and a gangway 300. The gangway 300 is rotatably installed on the ship's side of the deck through a rotating part 301, so that the gangway 300 has a storage position in a horizontal state and a boarding position in an inclined state. When the freeboard of the ship is less than 9 meters, the pilot climbs directly up the pilot ladder 100 to board the ship. When the freeboard of the ship is greater than 9 meters, in order to ensure the safety of the pilot boarding the ship, the pilot needs to first climb a section of the pilot ladder 100 and then transition to the gangway 300 to board the ship.

[0043] From a safety perspective, the pilot can climb at most 9 meters of the pilot ladder 100, and for the remaining height, the gangway 300 needs to be used to board the ship. Different freeboards of the ship require the gangway 300 to rotate at different angles. Different angles of the gangway 300 result in different positions of the boarding opening 302 of the gangway 300 in the length direction of the ship's side 200. It is necessary to adjust the release position of the pilot ladder 100 to cooperate with the gangway 300 so that the pilot can board the ship normally.

[0044] Based on the above problems, the ship further includes a pilot - ladder release and storage device. When the pilot climbs the pilot ladder 100 to board the ship, the pilot - ladder release and storage device releases the pilot ladder 100 for the pilot to climb. After the pilot leaves, the pilot - ladder release and storage device winds up and accommodates the pilot ladder 100. In addition, the pilot - ladder release and storage device can also adjust the relative position between the pilot ladder 100 and the gangway 300, and ensure that the boarding opening 302 of the pilot ladder and the gangway 300 can be connected without interfering with the lowering of the gangway 300, so as to facilitate the pilot to board the ship.

[0045] Figure 3 The figure shows a structural schematic diagram of the cooperation between the pilot - ladder release and storage device provided by an embodiment of the present utility model and the pilot ladder 100. Figure 4 The figure shows a structural schematic diagram of the cooperation between the pilot - ladder release and storage device without the housing and the pilot ladder 100 provided by an embodiment of the present utility model. As Figures 1 to 4As shown in the figure, the water intake flexible ladder releasing and storing device further includes a frame 1 and a releasing and winding mechanism 2. The frame 1 is movably arranged on the deck to adjust the position of the water intake flexible ladder releasing and storing device on the deck, thereby changing the releasing position of the water intake flexible ladder 100. The releasing and winding mechanism 2 includes a rotating shaft 21 rotatably arranged on the frame 1 and a driver 22 for driving the rotating shaft 21 to rotate to release or wind the water intake flexible ladder 100. One end of the water intake flexible ladder 100 is fixedly connected to the rotating shaft 21 and wound around the rotating shaft 21, so that the water intake flexible ladder releasing and storing device can normally release and wind and store the water intake flexible ladder 100, enabling the pilot to normally use the water intake flexible ladder 100 to board the ship.

[0046] It can be understood that only by adjusting the spatial position of the water intake flexible ladder releasing and storing device in the length direction of the ship, the releasing position of the water intake flexible ladder 100 can be adjusted, so that the boarding opening 302 of the accommodation ladder 300 is connected to the water intake flexible ladder 100, enabling the pilot to first use the water intake flexible ladder 100 and then transition to the accommodation ladder 300 to board the ship.

[0047] Continue as Figures 1 to 4 As shown in the figure, the water intake flexible ladder releasing and storing device further includes a track 4. The track 4 extends along the length direction of the ship and is fixed on the deck. The frame 1 cooperates with the track 4 and moves along the track 4, which can not only facilitate the stable directional movement of the frame 1 along the track 4, but more importantly, can prevent the frame 1 from moving in an arbitrary direction on the deck.

[0048] Continue as Figures 1 to 4 As shown in the figure, the vertical distance D1 between the first limit position 41 and the rotating part 301 of the accommodation ladder 300 is greater than the vertical distance D2 between the boarding opening 302 of the accommodation ladder 300 in the stored position and the rotating part 301 of the accommodation ladder 300. Thus, when the freeboard of the ship is less than 9 meters, the water intake flexible ladder releasing and storing device can directly release the water intake flexible ladder 100 at the first limit position 41 of the track 4, enabling the pilot to directly use the water intake flexible ladder 100 to board the ship. The vertical distance D3 between the second limit position and the rotating part 301 of the accommodation ladder 300 is not greater than the vertical distance D4 between the boarding opening 302 of the accommodation ladder 300 in the boarding position and the rotating part 301 of the accommodation ladder 300. When the water intake flexible ladder releasing and storing device is at the second limit position of the track 4, the accommodation ladder 300 rotates to the maximum limit along the rotating part 301. At this time, the accommodation ladder 300 rotates to the maximum angle to cooperate with the water intake flexible ladder 100 to reach the maximum allowable freeboard of the ship, and the water intake flexible ladder releasing and storing device moves stably and directionally along the track 4, thereby changing the position of the water intake flexible ladder 100 storing device for different freeboards of the ship.

[0049] Continue as Figures 1 to 4As shown, the frame 1 includes a bottom plate 11 and wheels 31 rotatably mounted on the bottom plate 11. The wheels 31 can rollingly cooperate with the track 4, so as to utilize the characteristic of the line contact between the wheels 31 and the track 4 to reduce the frictional force between the frame 1 and the track 4, and further enable the easy pushing of the flexible pilot ladder releasing and storing device, ultimately changing the spatial position of the flexible pilot ladder releasing and storing device in the longitudinal direction of the ship. Of course, in other embodiments, the frame 1 can also be directly slidably mated with the track 4, which can also achieve the movement of the frame 1 relative to the track 4.

[0050] The maneuvering mechanism further includes a locking portion 32 fixedly connected to the wheels 31, which can lock and unlock the wheels 31. Thus, when the flexible pilot ladder releasing and storing device reaches the releasing position of the flexible pilot ladder 100, the flexible pilot ladder releasing and storing device can be fixed, preventing the flexible pilot ladder releasing and storing device from sliding in the longitudinal direction of the ship when the pilot uses the flexible pilot ladder 100 to board the ship, thereby endangering the safety of the pilot.

[0051] Continue as Figures 1 to 4 As shown, the releasing length of the flexible pilot ladder 100 is determined by the freeboard of the ship. Different freeboards of the ship require the release of different lengths of the flexible pilot ladder 100. Continue as Figures 3 to 4 As shown, the releasing and winding mechanism 2 further includes a control unit 23 and an input unit 24. The control unit 23 is a driver control board, which can control the driver 22 to rotate the rotating shaft 21. The input unit 24 is a touch screen, which is communicatively connected to the control unit 23. The crew can manually input the freeboard length data of the ship by using the input unit 24, so as to control the driver 22 to drive the rotating shaft 21 to rotate and release the flexible pilot ladder 100 suitable for the input freeboard length data of the ship.

[0052] As Figures 3 to 4 As shown, the frame 1 includes a bottom plate 11 and a vertical frame 12 fixed to the bottom plate 11. The rotating shaft 21 is rotatably mounted on the vertical frame 12 and is located above the bottom plate 11, thus leaving a space for the flexible pilot ladder 100 to be wound around the rotating shaft 21.

[0053] In some embodiments, the frame 1 further includes a limiting member 13. The limiting member 13 is fixed to the vertical frame 12 and is arranged parallel and spaced apart from the rotating shaft 21. There is a gap between the limiting member 13 and the bottom plate 11 for the flexible pilot ladder 100 to pass through, so as to be able to define the releasing and winding trajectories of the flexible pilot ladder 100, preventing the flexible pilot ladder 100 from shaking due to unexpected situations during the pilot's boarding process, endangering the safety of the pilot who is boarding the ship.

[0054] Figure 5 Shows Figure 4 The partial enlarged view at A in Figures 4 to 5As shown, the release and winding mechanism 2 also includes a ratchet assembly 25, which includes a ratchet 251, a pawl 252 and an elastic member 253. The ratchet 251 is coaxially connected to one end of the rotating shaft 21, and the pawl 252 is movably mounted on the frame 1 through the elastic member 253. The elastic member 253 is used to maintain the pawl 252 in a position abutting against the ratchet teeth of the ratchet 251, so that the non-return characteristic of the ratchet 251 can be used to lock the rotating shaft 21, thereby preventing the rotating shaft 21 from rotating due to the weight of the pilot when the pilot is using the water ladder 100, thereby causing the water ladder 100 to be rapidly released, thereby ensuring the safety of the water ladder 100 during use.

[0055] Further, only when the ratchet 251 and the pawl 252 are no longer in conflict with each other, the rotating shaft 21 can be rotated to release the water ladder 100, and then the water ladder 100 is released. Figures 4 to 5 As shown, the ratchet assembly 25 also includes a toggle member 254 fixedly connected to the pawl 252, and the toggle member 254 can be toggled by the crew to disengage the pawl 252 from the ratchet teeth of the ratchet 251, so that the crew can release the winding mechanism 2 to release the water ladder 100 only when the crew concentrates and actively operates the toggle member 254 to manually unlock the ratchet assembly 25, thereby preventing the crew from releasing the winding mechanism 2 and releasing the water ladder 100 due to misoperation.

[0056] In some embodiments, continuing as Figures 4 to 5 As shown, the ratchet assembly 25 also includes an unlocker 255 capable of driving the toggle member 254 to move. The unlocker 255 is connected to the pawl through a rocker, so that when the crew manually inputs the ship's freeboard length data using the input unit 24, the unlocker 255 drives the rocker to rotate so that the pawl 252 disengages from the ratchet teeth of the ratchet 251 and compresses the elastic member 253, thereby achieving automatic unlocking of the ratchet assembly 25, and finally releasing the winding mechanism 2 to release the water ladder 100.

[0057] Continue as Figures 4 to 5 As shown, the offshore operating environment is harsh, and the high-salt and high-humidity air can easily cause electronic components to fail. The ratchet assembly 25 also includes a crank 256 with a fixed portion, and the fixed portion of the crank 256 is coaxially fixedly connected to the ratchet 251 or the rotating shaft 21, and the handle portion of the crank 256 is connected to the fixed portion. The crew holds the handle portion and shakes it so that the fixed portion drives the ratchet 251 and the rotating shaft 21 to rotate, so that when the driver 22, the control unit 23 or the input unit 24 fails and the water ladder release and storage device cannot automatically release the water ladder 100, the crew can manually unlock it by holding the toggle member 254, and then manually release the water ladder 100 by shaking the crank 256.

[0058] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the claims of the present utility model.

Claims

1. A ship, comprising a deck, a pilot ladder (100) and a gangway (300), wherein the gangway (300) is rotatably installed on the ship's side (200) of the deck and has a storage position in a horizontal state and a boarding position in an inclined state, characterized in that, The ship also includes a pilot ladder releasing and storing device, and the pilot ladder releasing and storing device includes: A frame (1), the frame (1) being movably arranged on the deck; A release and reeling mechanism (2), the release and reeling mechanism (2) comprising a rotating shaft (21) and a driver (22), the rotating shaft (21) being rotatably arranged on the frame (1), one end of the water ladder (100) being fixedly connected to the rotating shaft (21) and wound around the rotating shaft (21), and the driver (22) being capable of driving the rotating shaft (21) to rotate so as to release or reel the water ladder (100).

2. The ship according to claim 1, characterized in that, The water ladder release and storage device also includes a track (4), which extends along the length direction of the ship and is fixed on the deck, and the frame (1) cooperates with the track (4) and can move along the track (4).

3. The ship according to claim 2, characterized in that, The frame (1) comprises a base plate (11) and wheels (31) rotatably mounted on the base plate (11), wherein the wheels (31) are in rolling cooperation with the track (4).

4. The ship according to claim 2, characterized in that, The track (4) comprises: a first limiting position (41), wherein a vertical distance D1 between the first limiting position (41) and the rotating part (301) of the gangway (300) is greater than a vertical distance D2 between a ladder opening (302) of the gangway (300) in the storage position and the rotating part (301); A second limiting position (44), wherein a vertical distance D3 between the second limiting position (42) and the rotating part (301) is not greater than a vertical distance D4 between the staircase opening (302) at the staircase position and the rotating part (301).

5. The ship according to claim 3, characterized in that, The frame (1) further comprises a stand (12) fixed on the base plate (11); the rotating shaft (21) is rotatably mounted on the stand (12) and is located above the base plate (11).

6. The ship according to claim 5, characterized in that, The frame (1) further comprises a stopper (13), wherein the stopper (13) is fixed on the stand (12) and is arranged parallel to and spaced from the rotating shaft (21), and a spacer is provided between the stopper (13) and the bottom plate (11) for the water ladder (100) to pass through.

7. The ship according to any one of claims 1-6, characterized in that, The release and reeling mechanism (2) further comprises a ratchet assembly (25), wherein the ratchet assembly (25) comprises: A ratchet wheel (251), wherein the ratchet wheel (251) is coaxially connected to one end of the rotating shaft (21); A ratchet pawl (252) and an elastic member (253), wherein the ratchet pawl (252) is movably mounted on the frame (1) via the elastic member (253), and the elastic member (253) is used to maintain the ratchet pawl (252) at a position abutting against the ratchet teeth of the ratchet wheel (251).

8. The ship according to claim 7, characterized in that, The ratchet assembly (25) further comprises a toggle member (254), wherein the toggle member (254) is fixedly connected to the pawl (252), and the toggle member (254) can be toggle to disengage the pawl (252) from the ratchet teeth of the ratchet (251) and compress the elastic member (253).

9. The ship according to claim 7, characterized in that, The ratchet assembly (25) further comprises: Crank (256), the crank (256) includes a fixed part and a handle part connected to each other, the fixed part is coaxially and fixedly connected to the ratchet wheel (251) or the rotating shaft (21), and the handle part is for an operator to hold by hand.

10. The ship according to claim 8, characterized in that, The ratchet assembly (25) further includes an unlocker (255), the unlocker (255) is used to drive the toggling member (254) to move, so that the pawl (252) disengages from the ratchet teeth of the ratchet wheel (251) and compresses the elastic member (253).