A rotatable folding heavy-duty ramp and a ship

Abstract

The utility model relates to the technical field of marine springboard, specifically relates to a kind of rotatable folding heavy load springboard, including rotary mechanism, flap mechanism, first driving mechanism and second driving mechanism;Flap mechanism includes primary flap and secondary flap;First driving mechanism includes hinged seat, first driving part and second driving part, and first driving part drives hinged seat rotation to drive primary flap to rotate between horizontal position and vertical position;Second driving part can exert force to hinged seat to drive primary flap to rotate between vertical position and unfolded position;Second driving mechanism drives secondary flap rotation to unfold or fold secondary flap.The utility model forms the springboard for passing transport between ship body and shore base, can be docked with the shore base of different height;And still can adjust the angle of flap mechanism, it is convenient to be docked with the shore base of different position, reduce the difficulty of ship berthing docking.

Description

Technical Field

[0001] This utility model relates to the field of marine gangway technology, specifically to a rotatable and foldable heavy-duty gangway. Background Technology

[0002] Marine gangplanks are mainly used to connect ships to docks, facilitating the loading and unloading of personnel and goods, and have a certain load-bearing capacity.

[0003] Chinese utility model patent CN215752908U discloses a novel marine gangplank. One end of the gangplank has a boat plank, and the other end has a support plate. A flap is mounted on one end of the upper surface of the boat plank, and a support column is positioned above the support plate. One end of the gangplank is fixed to the boat plank using fixing pins, allowing the other end to rest on the support plate. A hydraulic telescopic rod then moves the movable plate along a slide rail. A rubber contact sleeve on the movable plate abuts against the side of the support plate, generating a certain supporting force and securing the gangplank, thus increasing safety. When the boat plank is affected by water level, creating a height difference between the boat plank and the support plate, the fixing pins are used to secure one end of the gangplank to the boat plank. The flap is then unfolded, with its bottom contacting the support plate. The support column is inserted into a through hole, and the cable on the cable reel is fixed to the lifting lug. Adjusting the cable length allows the cable to provide support when the gangplank is horizontal. However, this structural design is only suitable for light-load working environments and is not applicable when the shore is higher than the boat, resulting in a narrow application scenario.

[0004] In conclusion, there is an urgent need for a marine gangway to solve the problems existing in the current technology. Utility Model Content

[0005] The purpose of this utility model is to provide a rotatable, foldable, heavy-duty gangway that can dock at different heights and reduce the difficulty of ship berthing and docking. The specific technical solution is as follows:

[0006] A rotatable and foldable heavy-duty gangway is installed on the hull of a ship. The rotatable and foldable heavy-duty gangway includes a rotatable mechanism, a flipping mechanism, a first drive mechanism, and a second drive mechanism.

[0007] The slewing mechanism is rotatably mounted on the hull.

[0008] The flapping mechanism includes a primary flap and a secondary flap. The first end of the primary flap is hinged to the end of the slewing mechanism near the edge of the hull, and the second end is hinged to the secondary flap. The secondary flap is used to connect to the shore foundation.

[0009] The first driving mechanism includes a hinge seat, a first driving member, and a second driving member. The hinge seat is rotatably disposed at the hinge between the first-stage flap and the rotary mechanism, and the first end of the first-stage flap rests on the hinge seat. The first driving member is rotatably disposed on the rotary mechanism, and its output shaft is hinged to the hinge seat. The first driving member drives the hinge seat to rotate, thereby causing the first-stage flap to rotate between a horizontal position and a vertical position. The second driving member is rotatably disposed on the first-stage flap, and its output shaft is hinged to the hinge seat. The second driving member can apply a force to the hinge seat to cause the first-stage flap to rotate between a vertical position and an unfolded position.

[0010] The second driving mechanism is disposed on the first-stage flap, and the output end of the second driving mechanism is connected to the second-stage flap. The second driving mechanism drives the second-stage flap to rotate to unfold or fold the second-stage flap.

[0011] Optionally, the hinge seat includes a hinge plate and a support platform, the support platform being disposed on the hinge plate and used to support the first end of the first-stage flap;

[0012] The hinge plate is formed by a first side, a second side, a third side, and a fourth side. The first side and the second side are set at an acute angle, the second side and the third side are set at an obtuse angle, the third side and the fourth side are set at a right angle, and the fourth side and the first side are set at an obtuse angle.

[0013] The connection between the first side and the second side is hinged to the output shaft of the first drive member; the connection between the second side and the third side is hinged to the second drive member; and the connection between the fourth side and the first side is hinged to the rotary mechanism.

[0014] Optionally, there are two first drive mechanisms, which are respectively located on both sides of the first-stage flap.

[0015] Optionally, the second driving mechanism includes a third driving member, a winch, and a traction cable. The third driving member is disposed on the first-stage flap; the winch is disposed at the hinge between the first-stage flap and the second-stage flap; the traction cable is wound around the winch, and the first end of the traction cable is connected to the output shaft of the third driving member, and the second end is connected to the second-stage flap.

[0016] Optionally, there are multiple secondary flaps, which are sequentially hinged together, and adjacent secondary flaps are connected by the second driving mechanism.

[0017] Optionally, two second driving mechanisms are provided for each of the secondary flaps, and the two second driving mechanisms are respectively located on both sides of the secondary flap.

[0018] Optionally, the slewing mechanism includes a slewing table, a slewing base, and two slewing drive members disposed on both sides of the slewing base. The slewing table is embedded in the hull and rotatably connected to the hull. The slewing base is disposed on the slewing table. The slewing drive members are rotatably disposed on the hull, and the output end of the slewing drive members is connected to the slewing base.

[0019] Optionally, the first driving component, the second driving component, the third driving component, and the rotary driving component are all hydraulic cylinders.

[0020] Optionally, the rotatable folding heavy-duty plank further includes a movable flap and a support base. The movable flap is hinged to the end of the flap mechanism away from the rotatable mechanism, and the movable flap is used to overlap the shore base. The support base is hinged at the hinge point between the movable flap and the flap mechanism, and the support base is used to be set on the shore base to support the movable flap.

[0021] This utility model also provides a ship, which includes a hull and a rotatable, foldable, heavy-duty ramp as described above.

[0022] By applying the technical solution of this utility model, when docking the ship with the shore, the first driving member first drives the hinged seat to rotate, causing the first-stage flap to rotate from a horizontal position to a vertical position. Then, the second driving member applies a force to the hinged seat, causing the first-stage flap to rotate from a vertical position to an unfolded position. Simultaneously, the third driving member drives the second-stage flap to rotate, so that the second-stage flap unfolds and is flush with the first-stage flap. The first driving member then continues to drive the first-stage flap to rotate until the second-stage flap overlaps the shore. The first-stage and second-stage flaps form a ramp for passage and transportation between the ship and the shore, enabling docking with shores at different heights. Furthermore, the angle of the flap mechanism can be adjusted by the slewing mechanism, eliminating the need for multiple adjustments to the ship's heading to dock with shores at different locations, thus reducing the difficulty of ship docking.

[0023] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the rotatable folding heavy-duty springboard in the embodiment of this utility model when it is extended;

[0026] Figure 2 This is a schematic diagram of the foldable heavy-duty ramp in an embodiment of the present invention when folded.

[0027] Figure 3 This is a schematic diagram of the hinge seat in an embodiment of this utility model;

[0028] Figure 4 yes Figure 2 Top view;

[0029] Figure 5 This is a top view of the flap mechanism in the embodiment of this utility model when it is turning;

[0030] Figure 6 This is a schematic diagram of the structure of the first-stage flap in the vertical position in an embodiment of this utility model;

[0031] Figure 7 This is a schematic diagram of the structure of the rotating and folding heavy-duty gangway docking with the shore base at the same height as the ship hull in this embodiment of the utility model;

[0032] Figure 8 This is a schematic diagram of the structure of the rotatable and foldable heavy-duty gangway connected to the shore base above the hull in this embodiment of the utility model;

[0033] Figure 9 This is a schematic diagram of the structure of the rotating and foldable heavy-duty gangway docking below the shore base of the ship in this embodiment of the present invention.

[0034] Among them, 1 is the slewing mechanism, 1.1 is the slewing platform, 1.2 is the slewing base, 1.3 is the slewing drive component, 2 is the flipping mechanism, 2.1 is the first-level flipping plate, 2.2 is the second-level flipping plate, 3 is the first drive mechanism, 3.1 is the hinge seat, 3.1.1 is the hinge plate, 3.1.1.1 is the first side, 3.1.1.2 is the second side, 3.1.1.3 is the third side, 3.1.1.4 is the fourth side, 3.1.2 is the support platform, 3.2 is the first drive component, 3.3 is the second drive component, 4 is the second drive mechanism, 4.1 is the third drive component, 4.2 is the winch, 4.3 is the traction cable, 4.4 is the rope connection seat, 5 is the movable flipping plate, 6 is the support seat, 7 is the hull, and 8 is the shore base. Detailed Implementation

[0035] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0036] Example 1:

[0037] See Figures 1 to 2The rotatable and foldable heavy-duty gangway, mounted on the hull 7, includes a slewing mechanism 1, a flipping mechanism 2, a first drive mechanism 3, and a second drive mechanism 4. The slewing mechanism 1 is rotatably mounted on the hull 7. The flipping mechanism 2 includes a primary flipping plate 2.1 and a secondary flipping plate 2.2. The first end of the primary flipping plate 2.1 is hinged to the slewing mechanism 1, and the second end is hinged to the secondary flipping plate 2.2. The secondary flipping plate 2.2 is used to connect to the shore foundation 8. The first drive mechanism 3 includes a hinge seat 3.1, a first drive component 3.2, and a second drive component 3.3. The hinge seat 3.1 is rotatably mounted at the hinge between the primary flipping plate 2.1 and the slewing mechanism 1, and the first end of the primary flipping plate 2.1 rests on the hinge seat 3.1. The first drive component 3.2 is rotatably mounted on the slewing mechanism. The first drive member 3.2 is hinged to the hinge seat 3.1, and the first drive member 3.2 drives the hinge seat 3.1 to rotate so as to drive the first-stage flap 2.1 to rotate between the horizontal and vertical positions. The second drive member 3.3 is rotatably mounted on the first-stage flap 2.1, and the output shaft of the second drive member 3.3 is hinged to the hinge seat 3.1. The second drive member 3.3 can apply a force to the hinge seat 3.1 to drive the first-stage flap 2.1 to rotate between the vertical position and the unfolded position. The second drive mechanism 4 is mounted on the first-stage flap 2.1, and the output end of the second drive mechanism 4 is connected to the second-stage flap 2.2. The second drive mechanism 4 drives the second-stage flap 2.2 to rotate so as to unfold or fold the second-stage flap 2.2.

[0038] The first drive mechanism 3 is located on the central axis of the first-stage flap 2.1, and the bottom of the first-stage flap 2.1 forms an installation space for the first drive mechanism 3. The first-stage flap 2.1 can be rotated between the horizontal position, the vertical position and the unfolded position by the first drive mechanism 3 to unfold or fold. A hollow part is formed at the end of the first-stage flap 2.1 near the second-stage flap 2.2. The second drive component 3.3 is located at the hollow part and is connected to the second-stage flap 2.2 by the traction cable 4.3.

[0039] During the docking of the hull 7 and the shore base 8, the first drive member 3.2 drives the hinge seat 3.1 to rotate, causing the first-stage flap 2.1 to rotate from a horizontal position to a vertical position. Then, the second drive member 3.3 applies force to the hinge seat 3.1 to rotate the first-stage flap 2.1 from a vertical position to an unfolded position. Simultaneously, the third drive member 4.1 drives the second-stage flap 2.2 to rotate so that the second-stage flap 2.2 unfolds and is flush with the first-stage flap 2.1. The first drive member 3.2 continues to drive the first-stage flap 2.1 to rotate until the second-stage flap 2.2 overlaps the shore base 8. The first-stage flap 2.1 and the second-stage flap 2.2 form a ramp for passage and transportation between the hull 7 and the shore base 8, enabling docking with shore bases 8 at different heights. Furthermore, the angle of the flap mechanism 2 can be adjusted by the slewing mechanism 1, allowing docking with shore bases 8 at different positions without multiple adjustments to the ship's heading, reducing the difficulty of ship docking.

[0040] Based on the above embodiments, and in conjunction with [see also...] Figure 3 The hinge plate 3.1.1 is formed by the first side 3.1.1.1, the second side 3.1.1.2, the third side 3.1.1.3, and the fourth side 3.1.1.4. The first side 3.1.1.1 and the second side 3.1.1.2 form an acute angle, the second side 3.1.1.2 and the third side 3.1.1.3 form an obtuse angle, and the third side 3.1.1.3 and the fourth side form a right angle. The fourth side is set at an obtuse angle to the first side 3.1.1.1; the connection between the first side 3.1.1.1 and the second side 3.1.1.2 is hinged to the output shaft of the first drive member 3.2; the connection between the second side 3.1.1.2 and the third side 3.1.1.3 is hinged to the second drive member 3.3; the connection between the fourth side 3.1.1.4 and the first side 3.1.1.1 is hinged to the rotary mechanism 1. When the first-stage flap 2.1 is in the horizontal position, its third side is parallel to the rotary mechanism, so that the first drive member can drive the hinge seat to rotate. The first end of the first-stage flap 2.1 is supported on the support platform 3.1.2. The first drive member 3.2 can drive the hinge plate 3.1.1 to rotate around the third hinge position 3.1.1.3, so that the first-stage flap 2.1 can rotate between the horizontal and vertical positions through the support platform 3.1.2. The second drive member 3.3 can apply a pushing force to the hinge seat 3.1, and at the same time, the hinge seat 3.1 will apply a reaction force to the first-stage flap 2.1 through the second drive member 3.3, thereby driving the first-stage flap 2.1 to rotate from the vertical position to the unfolded position. When the second drive member 3.3 applies a pulling force to the hinge seat 3.1, the second drive member 3.3 pulls the first-stage flap 2.1 to rotate from the unfolded position to the vertical position. Then the first drive member 3.2 drives the hinge seat 3.1 to rotate, so that the first-stage flap 2.1 returns to the horizontal position. The first driving component 3.2, the second driving component 3.3 and the hinge seat 3.1 cooperate to switch the first-stage flap 2.1 between the horizontal and vertical positions, which facilitates the unfolding and retraction of the first-stage flap 2.1.

[0041] Specifically, such as Figures 4 to 6As shown, the second drive mechanism 4 includes a third drive member 4.1, a winch 4.2, and a traction cable 4.3. The third drive member 4.1 is mounted on the first-stage flap 2.1; the winch 4.2 is located at the hinge between the first-stage flap 2.1 and the second-stage flap 2.2; the traction cable 4.3 is wound around the winch 4.2, with its first end connected to the output shaft of the third drive member 4.1 and its second end connected to the second-stage flap 2.2. The second-stage flap 2.2 is also provided with a rope connecting seat 4.4 for connecting the traction cable 4.3. The third drive member 4.1 is arranged along the central axis of the first-stage flap 2.1, and the third drive member 4.1 retracts the traction cable 4.3 to pull the second-stage flap 2.2 to rotate and unfold, or releases the traction cable 4.3 to allow the second-stage flap 2.2 to rotate back to its initial position under gravity and fold. While the first-stage flap 2.1 rotates from the vertical position to the unfolded position, the second drive component 3.3 also drives the second-stage flap 2.2 to unfold. Furthermore, by controlling the extension and retraction speeds of the first and second drive components 3.2 and 3.3, the relative posture of the first-stage and second-stage flaps 2.1 can be controlled, thereby controlling the overall center of gravity of the flaps and improving the stability during the unfolding process. The second drive component 3.3 can be a hydraulic telescopic rod or an electric winch.

[0042] In addition, the slewing mechanism 1 includes a slewing platform 1.1, a slewing base 1.2, and two slewing drive components 1.3 respectively disposed on both sides of the slewing base 1.2. The slewing platform 1.1 is embedded in the hull 7 and rotatably connected to the hull 7; the slewing base 1.2 is disposed on the slewing platform 1.1; the slewing drive components 1.3 are rotatably disposed on the hull 7, and the output end of the slewing drive components 1.3 is connected to the slewing base 1.2. In practical applications, the angle of the slewing base 1.2 may be adjusted by adjusting the extension and retraction of the slewing drive components 1.3, thereby facilitating the turning of the flap mechanism 2 to overlap with the corresponding shore base 8.

[0043] Among them, the first driving component 3.2, the second driving component 3.3, the third driving component 4.1 and the rotary driving component 1.3 are all hydraulic cylinders.

[0044] In addition, the rotatable folding heavy-duty ramp also includes a movable flap 5 and a support base 6. The movable flap 5 is hinged to the end of the flap mechanism 2 away from the rotating mechanism 1, and the movable flap 5 is used to overlap the shore base 8. The support base 6 is hinged at the hinge point between the movable flap 5 and the flap mechanism 2, and the support base 6 is used to be set on the shore base 8 to support the movable flap 5. Both the movable flap 5 and the support base 6 are non-powered hinged to the flap mechanism 2. When the secondary flap 2.2 approaches the shore base 8, the support base 6 is perpendicular to the shore base 8 and supports the secondary flap 2.2. The movable flap 5 then automatically overlaps the ground under the action of gravity, forming a flat passage.

[0045] The installation process for the rotatable, multi-stage folding, heavy-duty flap platform includes the following steps:

[0046] Step 1: Determine the distance and angle between the hull 7 and the shore base 8, determine the required rotation angle of the slewing mechanism 1, drive the slewing drive component 1.3 to extend, and rotate the slewing base 1.2 to the specified angle. At this time, use the hydraulic circuit to lock the slewing drive component 1.3, and complete the overall rotation of the flipping mechanism 2.

[0047] Step 2: Drive the first drive component 3.2 to extend, unfold the first-stage flap 2.1 from the horizontal position to the vertical position (at this time, the second-stage flap 2.2 is still in the folded state), and then lock the first drive component 3.2.

[0048] Step 3: Drive the second drive component 3.3 to extend, thereby pushing the first-stage flap 2.1 to continue rotating. At the same time, drive the third drive component 4.1 to retract, and pull the second-stage flap 2.2 to unfold through the guide of the winch wheel 4.2.

[0049] Step 4: As the adaptive ramp approaches the shore base 8, the third drive component 4.1 continues to retract, and the winch 4.27 pulls the traction cable 4.3 to unfold the secondary flap 2.2 until it is parallel to the primary flap 2.15. At this time, the first drive component 3.2 slowly extends, causing the tilting mechanism composed of the primary flap 2.1 and the secondary flap 2.2 to slowly rotate until the support base 6 contacts the ground of the shore base 8. Figures 7 to 9 As shown, the rotatable, multi-stage folding heavy-duty flap can be connected to shore bases 8 at different heights. The movable flap 5 automatically connects to the ground under gravity, completing the construction of a stable passage from the hull 7 to the shore base 8.

[0050] Once all materials or personnel have passed through the flip-board, the withdrawal process is carried out using the reverse steps of setup.

[0051] This embodiment also provides a vessel, which includes a hull 7 and a rotatable, foldable, heavy-duty ramp as described above.

[0052] Example 2:

[0053] The difference from Embodiment 1 is that there are two first drive mechanisms 3, which are respectively located on both sides of the first-stage flap 2.1. Having two first drive mechanisms 3 helps to ensure the stability of the unfolding and folding process of the first-stage flap 2.1.

[0054] Example 3:

[0055] The difference from Embodiment 1 is that there are multiple secondary flaps 2.2, which are sequentially hinged together, and adjacent secondary flaps 2.2 are connected by a second drive mechanism 4. The sequential hinged arrangement of multiple secondary flaps 2.2 extends the overlap length of the flap mechanism 2, thereby adapting to the longer shoreline 8 in shallow water areas.

[0056] Two second drive mechanisms 4 are respectively provided on both sides of the first and second stage flip plates 2.2. The two first drive mechanisms 3 are respectively provided on the first and second stage flip plates 2.2 to ensure the stability of the unfolding and folding process of the second stage flip plates 2.2.

[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rotatable, foldable, heavy-duty gangway, mounted on the hull (7), characterized in that, The rotatable folding heavy-duty ramp includes a rotation mechanism (1), a flip mechanism (2), a first drive mechanism (3), and a second drive mechanism (4); The slewing mechanism (1) is rotatably mounted on the hull (7); The flap mechanism (2) includes a first-stage flap (2.1) and a second-stage flap (2.2). The first end of the first-stage flap (2.1) is hinged to the end of the rotating mechanism (1) near the edge of the hull (7), and the second end is hinged to the second-stage flap (2.2). The second-stage flap (2.2) is used to connect to the shore base (8). The first driving mechanism (3) includes a hinge seat (3.1), a first driving member (3.2), and a second driving member (3.3). The hinge seat (3.1) is rotatably disposed at the hinge between the first-stage flap (2.1) and the rotary mechanism (1), and the first end of the first-stage flap (2.1) rests on the hinge seat (3.1). The first driving member (3.2) is rotatably disposed on the rotary mechanism (1), and the output shaft of the first driving member (3.2) is hinged to the hinge seat (3.1). The first driving member (3.2) drives the hinge seat (3.1) to rotate so as to drive the first-stage flap (2.1) to rotate between a horizontal position and a vertical position; the second driving member (3.3) is rotatably disposed on the first-stage flap (2.1), and the output shaft of the second driving member (3.3) is hinged to the hinge seat (3.1), and the second driving member (3.3) can apply a force to the hinge seat (3.1) to drive the first-stage flap (2.1) to rotate between a vertical position and an unfolded position; The second driving mechanism (4) is disposed on the first-stage flap (2.1), and the output end of the second driving mechanism (4) is connected to the second-stage flap (2.2). The second driving mechanism (4) drives the second-stage flap (2.2) to rotate to unfold or fold the second-stage flap (2.2).

2. The rotatable folding heavy-duty plank according to claim 1, characterized in that, The hinge base (3.1) includes a hinge plate (3.1.1) and a support platform (3.1.2). The support platform (3.1.2) is disposed on the hinge plate (3.1.1) and is used to support the first end of the first-stage flap (2.1). The hinge plate (3.1.1) is formed by a first side (3.1.1.1), a second side (3.1.1.2), a third side (3.1.1.3), and a fourth side (3.1.1.4), wherein the first side (3.1.1.1) and the second side (3.1.1.4) are connected. 3.1.1.2) is set at an acute angle, and the second side (3.1.1.2) and the third side ( 3.1.1.3) is set at an obtuse angle, the third side ( 3.1.1.3) is set at a right angle to the fourth side, and the fourth side is set at an obtuse angle to the first side (3.1.1.1); The first side (3.1.1.1) and the second side ( The connection point of 3.1.1.2) is hinged to the output shaft of the first driving member (3.2); the second side (3.1.1.2) is hinged to the third side ( The connection point of 3.1.1.3) is hinged to the second driving member (3.3); the fourth side (3.1.1.4) is hinged to the first side ( The connection point of 3.1.1.1) is hinged to the rotary mechanism (1).

3. The rotatable folding heavy-duty plank according to claim 2, characterized in that, There are two first drive mechanisms (3), which are respectively located on both sides of the first-stage flap (2.1).

4. The rotatable folding heavy-duty plank according to claim 3, characterized in that, The second drive mechanism (4) includes a third drive member (4.1), a winch (4.2), and a traction cable (4.3). The third drive member (4.1) is disposed on the first-stage flap (2.1). The winch (4.2) is disposed at the hinge between the first-stage flap (2.1) and the second-stage flap (2.2). The traction cable (4.3) is wound around the winch (4.2), and the first end of the traction cable (4.3) is connected to the output shaft of the third drive member (4.1), and the second end is connected to the second-stage flap (2.2).

5. The rotatable folding heavy-duty plank according to any one of claims 1-4, characterized in that, There are multiple secondary flaps (2.2), which are hinged together in sequence, and adjacent secondary flaps (2.2) are connected by the second driving mechanism (4).

6. The rotatable folding heavy-duty plank according to claim 5, characterized in that, Two second driving mechanisms (4) are provided on the secondary flap (2.2), and the two second driving mechanisms (4) are respectively located on both sides of the secondary flap (2.2).

7. The rotatable folding heavy-duty plank according to claim 4, characterized in that, The slewing mechanism (1) includes a slewing platform (1.1), a slewing base (1.2), and two slewing drive members (1.3) respectively disposed on both sides of the slewing base (1.2). The slewing platform (1.1) is embedded in the hull (7) and rotatably connected to the hull (7). The slewing base (1.2) is disposed on the slewing platform (1.1). The slewing drive members (1.3) are rotatably disposed on the hull (7), and the output end of the slewing drive members (1.3) is connected to the slewing base (1.2).

8. The rotatable folding heavy-duty plank according to claim 7, characterized in that, The first drive component (3.2), the second drive component (3.3), the third drive component (4.1), and the rotary drive component (1.3) are all hydraulic cylinders.

9. The rotatable folding heavy-duty plank according to any one of claims 1-4, characterized in that, The rotatable folding heavy-duty plank also includes a movable flap (5) and a support base (6). The movable flap (5) is hinged to the end of the flap mechanism (2) away from the rotating mechanism (1). The movable flap (5) is used to overlap the shore base (8). The support base (6) is hinged at the hinge point between the movable flap (5) and the flap mechanism (2), and the support base (6) is used to be set on the shore base (8) to support the movable flap (5).

10. A ship, characterized in that, The vessel includes a hull (7) and a rotatable, foldable, heavy-duty ramp as described in any one of claims 1 to 9.

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