A loading and unloading ship

Abstract

The present application discloses a loading and unloading ship, comprising: a fixed deck, comprising a first end and a second end arranged opposite to each other; a lifting deck, which is arranged at the first end so as to be liftable relative to the fixed deck; and a center of gravity adjustment device, which is arranged at the second end and is used to increase or decrease the load at the second end of the fixed deck. The present application increases or decreases the load at the second end of the fixed deck through the center of gravity adjustment device, so that the first end and the second end of the loading and unloading ship are basically kept in a horizontal state during the operation of the trolley loading and unloading operation, thereby improving the safety of the handling operation.

Description

Technical Field

[0001] The present application relates to the technical field of offshore engineering equipment, and in particular to a loading and unloading ship. Background Art

[0002] Port loading and unloading refers to various loading and unloading operations carried out at the port. For large workpieces, when large workpieces are loaded from the port terminal to the ship, or large workpieces are unloaded from the ship to the dock, the change in the center of gravity will cause the hull to tilt, posing a safety hazard to the handling operation. Summary of the invention

[0003] An embodiment of the present application provides a loading and unloading ship, which can keep the loading and unloading ship in a basically balanced state during the handling operation and reduce the operation risk.

[0004] In a first aspect, an embodiment of the present application provides a loading and unloading ship, comprising:

[0005] A fixed deck including a first end and a second end disposed oppositely;

[0006] A lifting deck is provided at the first end so as to be liftable relative to the fixed deck;

[0007] A center of gravity adjusting device is arranged at the second end and is used to increase or reduce the load on the second end of the fixed deck.

[0008] Optionally, the center of gravity adjustment device includes:

[0009] A water tank is arranged at the second end, and the water tank includes a first window and a first cover body arranged at the first window. The first cover body can be opened or closed relative to the first window and is used to adjust the water volume in the water tank.

[0010] Optionally, the center of gravity adjustment device also includes a water pumping system for pumping water into the water tank through the first window, or discharging water out of the water tank.

[0011] Optionally, the water tank is telescopically connected to the second end.

[0012] Optionally, the water tank is liftably connected to the second end;

[0013] The water tank further comprises a second window, which is arranged on the top wall or the side wall of the water tank and is used to drain water out of the water tank;

[0014] The first window is arranged on the bottom wall of the water tank and is used for filling water into the water tank.

[0015] Optionally, the second window is arranged on a side wall of the water tank;

[0016] The water tank further comprises a second cover body arranged on the second window, and the second cover body slides over the second window from bottom to top to adjust the opening size of the second window.

[0017] Optionally, the center of gravity adjustment device further includes a control module, and the control module includes:

[0018] a levelness measuring unit, configured to detect a height difference between the first end and the second end;

[0019] The regulating unit is configured to execute at least one of the following control instructions to regulate the water level in the water tank when the height difference exceeds the first preset threshold value, until the height difference is reduced to a second preset threshold value:

[0020] Controlling the first cover to open or close;

[0021] Controlling the water tank to rise or fall;

[0022] Controlling the water tank to move closer to or farther from the second end;

[0023] Control the second cover to slide upward or downward.

[0024] Optionally, the fixed deck is provided with a half-moon pool at the first end, the lifting deck has a shape adapted to the half-moon pool and is arranged in the half-moon pool, and the lifting deck is connected to the fixed deck via a rack and pinion mechanism.

[0025] Optionally, along the direction from the first end to the second end, the fixed deck is provided with at least one set of first tracks, and the lifting deck is provided with at least one set of second tracks, and the at least one set of first tracks corresponds to the at least one set of second tracks in a one-to-one manner;

[0026] The fixed deck is provided with a first alignment mechanism, and the lifting deck is provided with a second alignment mechanism that cooperates with the first alignment mechanism. When the second alignment mechanism cooperates with the first alignment mechanism, the at least one group of first rails is docked with the at least one group of second rails in a one-to-one correspondence.

[0027] Optionally, the end surface of the first end of the fixed deck is substantially flush with the end surface of the lifting deck close to the first end, and the end surface of the first end of the fixed deck and / or the end surface of the lifting deck close to the first end are provided with a protruding structure.

[0028] Optionally, the protrusion structure is an elastic protrusion structure;

[0029] And / or the protruding structure is rotatable in at least one direction.

[0030] Optionally, the protrusion structure includes a spherical cap-shaped hole and a sphere disposed in the spherical cap-shaped hole;

[0031] The spherical cap-shaped hole is arranged on the end surface of the first end of the fixed deck and / or the end surface of the lifting deck close to the first end, and the spherical cap height of the spherical cap-shaped hole is greater than the radius of the spherical cap-shaped hole;

[0032] The radius of the sphere is smaller than the radius of the spherical cap-shaped hole, and the diameter of the sphere is larger than the spherical cap height of the spherical cap-shaped hole and larger than the width of the spherical cap-shaped hole.

[0033] The embodiment of the present application provides a loading and unloading ship, comprising: a fixed deck, comprising a first end and a second end arranged opposite to each other; a lifting deck, which is arranged at the first end so as to be liftable relative to the fixed deck; and a center of gravity adjustment device, which is arranged at the second end and is used to increase or decrease the load at the second end of the fixed deck. When the trolley is operated to perform loading and unloading operations, the center of gravity adjustment device is used to increase or decrease the load at the second end of the fixed deck, so that the first end and the second end of the loading and unloading ship can be kept substantially horizontal, thereby improving the safety of the handling operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The technical solution and beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0035] Figure 1 It is a structural schematic diagram of a loading and unloading ship provided in an embodiment of the present application.

[0036] Figure 2 yes Figure 1 Schematic diagram of the explosion structure of the mid-loading ship;

[0037] Figure 3 This is a structural schematic diagram of a center of gravity adjustment device provided in an embodiment of the present application.

[0038] Figure 4 A schematic diagram of the structure of a water tank provided in an embodiment of the present application;

[0039] Figure 5 A schematic structural diagram of another center of gravity adjustment device provided in an embodiment of the present application;

[0040] Figure 6 yes Figure 2 A schematic diagram of the enlarged structure of part A;

[0041] Figure 7 yes Figure 1 A schematic diagram of the enlarged structure of part B;

[0042] Figure 8A schematic structural diagram of a protrusion structure provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] Please refer to the drawings, in which the same component symbols represent the same components. The following description is based on the illustrated specific embodiments of the present application, which should not be considered as limiting other specific embodiments not described in detail herein. In the absence of conflict, the following embodiments and their technical features can be combined with each other.

[0044] See also Figure 1 and Figure 2 , Figure 1 is a structural schematic diagram of a loading and unloading ship provided in an embodiment of the present application, Figure 2 yes Figure 1 Schematic diagram of the explosion structure of the loading and unloading ship. The loading and unloading ship 100 includes a fixed deck 10, a lifting deck 20 and a center of gravity adjustment device 30. The fixed deck 10 includes a first end 10A and a second end 10B that are arranged opposite to each other. The lifting deck 20 is arranged at the first end 10A to be liftable relative to the fixed deck 10. The center of gravity adjustment device 30 is arranged at the second end 10B to increase or reduce the load of the second end 10B of the fixed deck 10. Figure 1 In the embodiment, the first end 10A of the loading and unloading ship 100 is close to the dock 101, and the operating vehicle 102 shuttles back and forth between the loading and unloading ship 100 and the dock 101 to perform loading and unloading operations.

[0045] When the trolley 102 loaded with large workpieces travels from the dock 101 to the loading and unloading ship 100 for loading operations, or travels from the loading and unloading ship 100 to the dock 101 for unloading operations, the change in the center of gravity will cause the hull to tilt, posing a safety hazard to the handling operation.

[0046] It is understandable that the loading and unloading ship 100 may include a stern and a bow. In one embodiment, the first end 10A of the fixed deck 10 may be an end close to the stern, and the second end 10B of the fixed deck 10 may be an end close to the bow. The lifting deck 20 is located at the stern, and the stern of the loading and unloading ship 100 is close to the dock 101 for loading and unloading operations. The lifting deck 20 can adjust the lifting height to align with the dock ground, so as to facilitate the operation of the trolley 102 to and from the loading and unloading ship 100 and the dock 101 for loading and unloading operations. In addition, since the lifting deck 20 can adjust the lifting height, the loading and unloading ship 100 can adapt to the height difference between the loading and unloading ship 100 and the dock 101 caused by tidal changes, and realize all-weather operation.

[0047] During the loading operation, the operating trolley 102 loads large workpieces and travels from the dock 101 to the loading and unloading ship 100. When it travels to the first end 10A of the fixed deck 10, due to the sharp increase in the weight of the stern, the center of gravity of the loading and unloading ship 100 is biased to one side of the stern, and the stern sinks and causes tilting. The load on the second end 10B of the fixed deck 10 is increased through the center of gravity adjusting device 30, and the center of gravity is corrected from the position close to the stern to the middle of the loading and unloading ship 100 to restore the balance of the loading and unloading ship 100, so that the operating trolley 102 can travel smoothly on the loading and unloading ship 100. Similarly, when the operating trolley 102 loads large workpieces and travels from the loading and unloading ship 100 to the dock 101 for unloading operations, when the operating trolley 102 drives away from the loading and unloading ship 100 to the dock 101, due to the rapid reduction in the weight of the stern, the center of gravity of the loading and unloading ship 100 deviates to one side of the bow, and the bow sinks and tilts. The load on the second end 10B of the fixed deck 10 is reduced by the center of gravity adjusting device 30, and the center of gravity is corrected from the position close to the bow to the middle of the loading and unloading ship 100 to restore the balance of the loading and unloading ship 100.

[0048] The loading and unloading ship 100 of this embodiment increases or decreases the load on the second end 10B of the fixed deck 10 through the center of gravity adjusting device 30, so that the stern and bow of the loading and unloading ship 100 are basically kept horizontal during the loading and unloading operation of the operating trolley 102, which can improve the safety of the handling operation.

[0049] In one embodiment, see Figure 3 , Figure 3 It is a structural schematic diagram of a center of gravity adjustment device provided in an embodiment of the present application. The center of gravity adjustment device 30 may include a water tank 31, and the center of gravity of the loading and unloading ship 100 is adjusted by the water tank 31. The water tank 31 is arranged at the second end 10B of the fixed deck 10, and the water tank 31 and the fixed deck 10 may be integrated or connected by a connector. The water tank 31 includes a first window 311 and a first cover 312 arranged at the first window 311. The first cover 312 can be opened or closed relative to the first window 311, and is used to adjust the amount of water in the water tank 31. Water can be injected into or drained from the water tank through the first window 311 to change the load of the second end 10B of the fixed deck 10, so that the center of gravity of the loading and unloading ship 100 can be adjusted.

[0050] As an example, see Figure 3 The gravity center adjustment device 30 may further include a water pumping system 32 for pumping water from the first window 311 into the water tank 31 or draining water out of the water tank 31. For example, an air-avoiding space 34 may be provided on one side of the water tank 31, and the water pumping system 32 may be provided in the air-avoiding space 34. The water pumping system 32 may be a vacuum pump connected to the inside of the water tank 31.

[0051] In one embodiment, the water tank 31 may be telescopically connected to the second end 10B. That is, the distance between the water tank 31 and the second end 10B of the fixed deck 10 is adjustable, for example, the water tank 31 may be connected to the second end 10B via a guide rod-guide rail structure. When the load on the second end 10B of the fixed deck 10 needs to be increased, the water tank 31 may be moved away from the second end 10B; when the load on the second end 10B of the fixed deck 10 needs to be reduced, the water tank 31 may be moved closer to the second end 10B.

[0052] In another embodiment, the water tank 31 may be connected to the second end 10B in a levitation manner, for example, connected to the second end 10B through a gear transmission mechanism to control the height of the water tank 31. When the load of the second end 10B of the fixed deck 10 needs to be increased, the water tank 31 may be controlled to rise and the draft of the water tank may be reduced to reduce buoyancy; when the load of the second end 10B of the fixed deck 10 needs to be reduced, the water tank 31 may be controlled to fall and the draft of the water tank may be increased to increase buoyancy.

[0053] The water tank 31 may further include a second window 313, see Figure 4 , Figure 4 A schematic diagram of the structure of a water tank provided in an embodiment of the present application. The second window 313 is arranged on the top wall or side wall of the water tank 31, and is used to drain water out of the water tank 31. The first window 311 is arranged on the bottom wall of the water tank 31, and is used to fill water into the water tank 31. For example, when it is necessary to fill water into the water tank 31, the first cover 312 is opened to allow water to flow in naturally; when it is necessary to drain water, the water can be discharged from the second window 313 through the water pump system 32. Preferably, the second window 313 is arranged on the side wall of the water tank 31, and the water tank 31 also includes a second cover 314 arranged on the second window 313, and the second cover 314 slides on the second window 313 from bottom to top, and is used to adjust the opening size of the second window 313. It can be understood that when the second cover 314 covers the second window 313, the sliding direction of the second cover 314 is from bottom to top, and when the second cover 314 is opened, the sliding direction is from top to bottom. When the second cover 314 is slid downward to open, water can be naturally discharged outward from the second window 313 without using the water pumping system 32 .

[0054] It can be understood that the more the second cover 314 slides downward, the more water in the water tank 31 flows outward from the second window 313, and the sliding position of the second cover 314 determines the water level in the water tank 31. In this embodiment, the liquid level in the water tank 31 can be controlled by controlling the sliding position of the second cover 314 to accurately reduce the load on the second end 10B of the fixed deck 10.

[0055] In one embodiment, see Figure 5 , Figure 5The structural schematic diagram of another center of gravity adjustment device provided in an embodiment of the present application, the center of gravity adjustment device 30 may also include a control module 33, and the control module 33 may be arranged on the fixed deck 10. The control module 33 includes a level measurement unit 331 and an adjustment unit 332. The level measurement unit 331 is used to detect the height difference between the first end 10A and the second end 10B. For example, the height difference may be detected by a level meter, and it can be determined which side is higher. The adjustment unit 332 is used to execute at least one of the following control instructions when the height difference exceeds a first preset threshold value to adjust the water level in the water tank 31 until the height difference is reduced to a second preset threshold value. The above control instructions include: (1) controlling the first cover 312 to open or close; (2) controlling the water tank 31 to rise or fall; (3) controlling the water tank 31 to approach or move away from the second end 10B; (4) controlling the second cover 314 to slide up or down.

[0056] For example, when the level measurement unit 331 detects that the height difference between the first end 10A and the second end 10B of the fixed deck 10 exceeds the first preset threshold value, for example, the first preset threshold value may be 15 cm, and the second end 10B is lower, as a first control method, the adjustment unit 332 may control the water tank 31 to descend to reduce the load on the second end 10B, so that the second end 10B of the fixed deck 10 floats, until the height difference between the first end 10A and the second end 10B is reduced to the second preset threshold value, for example, the second preset threshold value may be 8 cm, and the fixed deck 10 is basically adjusted to a horizontal state. In order to reduce the impact of wind and waves, the height difference may exceed the first preset threshold value and remain for a certain period of time (for example, 5s, 10s, etc.), and then the adjustment unit 332 starts to execute the control instruction. As a second control method, the adjustment unit 332 may control the water tank 31 to approach the second end 10B. According to the principle of lever, the reduction of the force arm can reduce the load of the water tank 31 acting on the second end 10B. As a third control method, the regulating unit 332 can also control the second cover 314 to slide downward so that the water in the water tank 31 can be discharged through the second window 313 .

[0057] For example, when the level measurement unit 331 detects that the height difference between the first end 10A and the second end 10B of the fixed deck 10 exceeds the first preset threshold value, and the second end 10B is higher, as a first control method, the adjustment unit 332 can control the first cover 312 to open, so as to inject water into the water tank 31, increase the load of the second end 10B, until the height difference between the first end 10A and the second end 10B is reduced to the second preset threshold value. As a second control method, the adjustment unit 332 can control the water tank 31 to move away from the second end 10B, and increase the load of the second end 10B. As a third control method, the adjustment unit 332 can also control the water tank 31 to rise, so as to increase the load of the second end 10B.

[0058] In one embodiment, see Figure 1 , Figure 2 and Figure 6 , Figure 6 yes Figure 2 The enlarged structural diagram of part A in the figure. The fixed deck 10 is provided with a half-moon pool 11 at the first end 10A, and the lifting deck 20 has a shape adapted to the half-moon pool 11 and is arranged in the half-moon pool 11. The lifting deck 20 is connected to the fixed deck 10 through a lifting mechanism 40. As an example, the lifting mechanism 40 can be a gear-toothed rod mechanism. For example, the lifting mechanism 40 can be provided in four groups, which can be symmetrically distributed on both sides of the lifting deck 20. The lifting mechanism 40 includes gears 41 and toothed rods 42 that cooperate with each other, wherein at least one pair of gears 41 is provided, which are respectively located on both sides of the toothed rod 42 and mesh with the toothed rod 42. Preferably, each toothed rod 42 corresponds to three pairs of gears 41, and the three pairs of gears 41 serve as backup for each other. When one or two pairs of gears fail, the lifting mechanism 40 can still work normally.

[0059] In one embodiment, see Figure 1 , Figure 2 and Figure 7 , Figure 7 yes Figure 1 The enlarged structural diagram of the B part shows that along the direction from the first end 10A to the second end 10B, the fixed deck 10 is provided with at least one set of first tracks 12, and the lifting deck 20 is provided with at least one set of second tracks 22. When there are multiple sets of first tracks 12 and second tracks 22, the first tracks 12 correspond to the second tracks 22 one by one. The fixed deck 10 is provided with a first alignment mechanism 13, and the lifting deck 20 is provided with a second alignment mechanism 23 that cooperates with the first alignment mechanism 13. When the second alignment mechanism 23 cooperates with the first alignment mechanism 13, the first track 12 and the second track 22 are docked one by one. The operating trolley 102 can travel from the first track 12 to the second track 22 to perform the handling operation.

[0060] As an example, see Figure 7, the first alignment mechanism 13 may include an alignment hole 131 and a fixed hydraulic rod 132 disposed on the side wall of the alignment hole 131, and the second alignment mechanism 23 may be an alignment hydraulic rod 23. When the lifting deck 20 moves to be substantially flush with the fixed deck 10, the alignment hydraulic rod 23 extends out and is sleeved in the alignment hole 131, and the fixed hydraulic rod 132 moves into the alignment hole 131 to fix the alignment hydraulic rod 23. In some examples, the alignment hole 131 may be a triangular hole, and three fixed hydraulic rods 132 are provided, which are respectively disposed on the three side walls of the triangular hole, so as to clamp and fix the alignment hydraulic rod 23 on three sides; the alignment hole 131 may also be a rectangular hole, and four fixed hydraulic rods 132 are provided, which are respectively disposed on the four side walls of the rectangular hole, so as to clamp and fix the alignment hydraulic rod 23 on four sides; of course, the alignment hole 131 may also be other polygonal holes, which are not particularly limited in this application.

[0061] In one embodiment, see Figure 2 , the end surface 14 of the first end 10A of the fixed deck 10 is substantially flush with the end surface 24 of the lifting deck 20 close to the first end 10A, and the end surface 14 of the first end 10A of the fixed deck 10 and / or the end surface 24 of the lifting deck 20 close to the first end 10A are provided with a protruding structure 50, that is, one of the end surface 14 and the end surface 24 is provided with the protruding structure 50, or both are provided with the protruding structure 50. The protruding structure 50 can reduce the contact area between the end surface 14 of the first end 10A of the fixed deck 10 and / or the end surface 24 of the lifting deck 20 close to the first end 10A and the dock 101, thereby reducing the wear of the end surface of the loading and unloading ship 100 and extending the service life of the loading and unloading ship 100.

[0062] It should be noted that, since the friction force becomes smaller, when the end face 24 of the lifting deck 20 is provided with a protruding structure, the lifting deck 20 can be directly lifted and lowered when the end face 24 is in contact with the dock 101. There is no need to first break contact between the loading and unloading ship 100 and the dock 101 and then lift and lower the lifting deck 20, which simplifies the operation.

[0063] As an example, the protruding structure 50 is an elastic protruding structure. For example, the protruding structure 50 can be made of elastic rubber, which can buffer the impact generated when the loading and unloading ship 100 docks at the dock 101.

[0064] As an example, the protruding structure 50 can be rotatable in at least one direction. For example, the protruding structure 50 can be a roller structure arranged on the end surface 14 and / or the end surface 24. For example, the roller structure can be arranged to roll in the vertical direction. When the loading and unloading ship 100 bumps up and down with the waves, the end surface 14 and / or the end surface 24 contacts the side of the dock 101 through the roller structure. The rolling friction is relative to the sliding friction, which can further reduce the wear of the end surface 14 and the end surface 24. The roller structure can be arranged to roll in the horizontal direction. When the loading and unloading ship 100 shakes left and right, the end surface 14 and / or the end surface 24 and the side of the dock 101 are in rolling friction, which reduces the wear of the hull.

[0065] As an example, see Figure 8 , Figure 8 A schematic diagram of a protrusion structure provided in an embodiment of the present application. The protrusion structure 50 includes a spherical cap-shaped hole 51 and a sphere 52 disposed in the spherical cap-shaped hole 51; the spherical cap-shaped hole 51 is disposed on the end surface 14 of the first end 10A of the fixed deck 10 and / or the end surface 24 of the lifting deck 20 close to the first end 10A, and the spherical cap height H of the spherical cap-shaped hole 51 is greater than the radius R of the spherical cap-shaped hole 51; the radius r of the sphere 52 is less than the radius R of the spherical cap-shaped hole 51, ensuring that the sphere 52 can be accommodated in the spherical cap-shaped hole 51, and the diameter d of the sphere 52 is greater than the spherical cap height H of the spherical cap-shaped hole 51, ensuring that the sphere 52 can protrude from the spherical cap-shaped hole 51, and the diameter d of the sphere 52 is greater than the width L of the spherical cap-shaped hole 51, ensuring that the sphere 52 will not fall out of the spherical cap-shaped hole 51.

[0066] The protruding structure 50 of this embodiment can make the end surface 14 and / or the end surface 24 and the side surface of the dock 101 rolling friction in any direction when they move relative to each other, which can greatly reduce the wear of the end surface 14 and the end surface 24. When the end surface 24 is provided with the protruding structure 50, the lifting deck 20 can be directly lifted and lowered when the end surface 24 is in contact with the dock 101, which simplifies the operation.

[0067] The above is a detailed introduction to a loading and unloading ship provided by the embodiment of the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and its core idea of ​​the present application; at the same time, for technicians in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. All equivalent structural changes made using the contents of the specification and drawings of this application, such as the mutual combination of technical features between the embodiments, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this application. In summary, the contents of this specification should not be understood as limiting the present application.

Claims

1. A loading and unloading ship, characterized in that: include: A fixed deck including a first end and a second end disposed oppositely; A lifting deck is provided at the first end so as to be liftable relative to the fixed deck; a center of gravity adjustment device, disposed at the second end, for increasing or decreasing the load on the second end of the fixed deck; The center of gravity adjustment device comprises: a water tank, disposed at the second end, the water tank comprising a first window and a first cover disposed at the first window, the first cover being openable or closable relative to the first window for adjusting the amount of water in the water tank; The water tank is telescopically connected to the second end; and, The water tank is movably connected to the second end; the water tank further comprises a second window, which is arranged on the side wall of the water tank and is used to drain water out of the water tank; the first window is arranged on the bottom wall of the water tank and is used to fill water into the water tank; The water tank further comprises a second cover body arranged on the second window, the second cover body slidingly covers the second window from bottom to top, and is used for adjusting the opening size of the second window; When water needs to be added to the water tank, the first cover is opened to allow water to flow in naturally; When the second cover slides downward and opens, water is naturally discharged outward from the second window; The center of gravity adjustment device further includes a control module, and the control module includes: a levelness measuring unit, configured to detect a height difference between the first end and the second end; The regulating unit is configured to execute at least one of the following control instructions to regulate the water level in the water tank when the height difference exceeds the first preset threshold value, until the height difference is reduced to a second preset threshold value: Controlling the first cover to open or close; Controlling the water tank to rise or fall; Controlling the water tank to move closer to or farther from the second end; The second cover is controlled to slide upward or downward.

2. The loading and unloading ship according to claim 1, characterized in that: The fixed deck is provided with a half-moon pool at the first end, the lifting deck has a shape adapted to the half-moon pool and is arranged in the half-moon pool, and the lifting deck is connected to the fixed deck via a gear rack mechanism.

3. The loading and unloading ship according to claim 2, characterized in that: Along the direction from the first end to the second end, the fixed deck is provided with at least one set of first tracks, and the lifting deck is provided with at least one set of second tracks, and the at least one set of first tracks corresponds to the at least one set of second tracks in a one-to-one manner; The fixed deck is provided with a first alignment mechanism, and the lifting deck is provided with a second alignment mechanism that cooperates with the first alignment mechanism. When the second alignment mechanism cooperates with the first alignment mechanism, the at least one group of first rails is docked with the at least one group of second rails in a one-to-one correspondence.

4. The loading and unloading ship according to claim 2, characterized in that: The end surface of the first end of the fixed deck is substantially flush with the end surface of the lifting deck close to the first end, and the end surface of the first end of the fixed deck and / or the end surface of the lifting deck close to the first end are provided with a protruding structure.

5. The loading and unloading ship according to claim 4, characterized in that: The protrusion structure is an elastic protrusion structure; And / or the protruding structure is rotatable in at least one direction.

6. The loading and unloading ship according to claim 5, characterized in that: The protrusion structure includes a spherical cap-shaped hole and a sphere disposed in the spherical cap-shaped hole; The spherical cap-shaped hole is arranged on the end surface of the first end of the fixed deck and / or the end surface of the lifting deck close to the first end, and the spherical cap height of the spherical cap-shaped hole is greater than the radius of the spherical cap-shaped hole; The radius of the sphere is smaller than the radius of the spherical cap-shaped hole, and the diameter of the sphere is larger than the spherical cap height of the spherical cap-shaped hole and larger than the width of the spherical cap-shaped hole.

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