A wave-blocking ramp device for amphibious operations on roll-on / roll-off ships

Abstract

This application discloses a wave-damping ramp device for amphibious operations on roll-on / roll-off (Ro-Ro) ships, comprising a ramp body, a ramp board, and a hydraulic strut mechanism. The ramp body obliquely connects the first and second vehicle decks, and wave-damping holes are formed in the lower half of the ramp surface. The ramp board is hinged to the middle of the upper surface of the ramp body and can be flipped up and down to cover the lower half of the ramp surface. The hydraulic strut mechanism is located below the ramp body and is used to drive the ramp board to flip up and down. This invention can allow vehicles to pass normally while eliminating wave impact and blocking wave rise, thus meeting the requirements for amphibious operations on Ro-Ro ships.

Description

Technical Field

[0001] This invention relates to large channel structures for roll-on / roll-off (Ro-Ro) ships, and more specifically to a wave-blocking ramp device for amphibious operations on Ro-Ro ships. Background Technology

[0002] Amphibious roll-on / roll-off (Ro-Ro) vessels can not only transport vehicles at the dock but also transport displacement boats at sea. During offshore operations, seawater will flow into the loading hold of the Ro-Ro vessel. To prevent seawater from corroding and damaging vehicles, two vehicle decks of different heights are generally installed, dividing the loading hold into two compartments. The lower compartment, connected to the stern ramp, is only for vehicle passage and boat parking, while the higher compartment is used for parking vehicles.

[0003] Two-level cabin decks are typically connected by ramps. Traditional ramps only need to accommodate vehicle passage, so their design, similar to a vehicle deck, is sufficient to meet vehicle load requirements. However, in amphibious transshipment operations, the ramps of roll-on / roll-off ships are exposed to wave impacts, and waves can even rise up the ramps to the upper vehicle cabins. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to provide a wave-blocking ramp device for amphibious operations on roll-on / roll-off ships, which solves the connection problem between loading decks at different heights on amphibious transport roll-on / roll-off ships, while eliminating wave impact and preventing wave rise.

[0005] Technical solution: This invention provides a wave-blocking ramp device for amphibious operations on roll-on / roll-off ships, comprising:

[0006] The ramp plate body is inclined to connect the first vehicle deck and the second vehicle deck, and the lower half of the ramp plate surface of the ramp plate body is provided with wave-damping holes.

[0007] The ramp, hinged to the middle of the upper surface of the ramp body, can be flipped up and down to cover the lower half of the ramp surface; and...

[0008] The hydraulic strut mechanism, located below the ramp body, is used to drive the ramp to flip up and down.

[0009] In this invention, lowering the gangplank allows for normal vehicle passage; when moving boats, raising the gangplank allows the wave-damping holes to eliminate wave impact and block some wave rise, while the raised gangplank also serves to block seawater.

[0010] Furthermore, the bulkhead is equipped with limit blocks to restrict the angle at which the ramp flips upward. The limit blocks provide a safety limit for the ramp and help prevent the ramp from being pushed up by waves.

[0011] Furthermore, a rubber pad is provided at the position on the limit block where it contacts the springboard.

[0012] Furthermore, the lower half of the ramp surface is provided with mooring holes for mooring boats.

[0013] Furthermore, a plank is hinged at the hinge point between the plank and the ramp board to bridge the height difference between them.

[0014] Furthermore, a third anti-slip strip is provided on the surface of the paving board.

[0015] Furthermore, the plank surface is provided with a first anti-slip strip.

[0016] Furthermore, a second anti-slip strip is provided on the upper half of the sloping board surface.

[0017] Furthermore, the hydraulic strut mechanism includes a hydraulic cylinder, the bottom end of which is hinged to the first vehicle deck, and the end of the hydraulic cylinder extension rod is hinged to the ramp.

[0018] Furthermore, the ramp plate body is welded to the first vehicle deck, the second vehicle deck, and the bulkhead, while the bottom is supported by supporting components.

[0019] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: it not only realizes the connection between the decks of different height compartments, ensuring the normal passage of vehicles; but also effectively eliminates the impact of waves on the ramp plate and blocks wave rise; thus meeting the conditions for roll-on / roll-off ships to carry out transshipment operations at sea and at the dock. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the wave-blocking ramp device provided in the embodiments of this application;

[0022] Figure 2 yes Figure 1 Top view;

[0023] Figure 3 This is a schematic diagram of the structure of the ramp plate body in the embodiment of this application;

[0024] Figure 4 This is a longitudinal sectional view of the ramp plate body in the embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the structure of the springboard in the embodiments of this application;

[0026] Figure 6 This is a schematic diagram of the structure of the paving board in the embodiments of this application;

[0027] Figure 7 This is a schematic diagram of the hydraulic strut mechanism in the embodiments of this application;

[0028] Figure 8 This is a schematic diagram of the structure of the limiting block in an embodiment of this application;

[0029] Figure 9 This is a schematic diagram of the wave-blocking ramp device in the supported state provided in the embodiments of this application;

[0030] Reference numerals: 1, ramp; 11, ramp surface; 12, first eyeboard; 13, first anti-slip strip; 2, ramp body; 21, ramp surface; 22, wave-damping hole; 23, lower half bottom support member; 24, upper half bottom support member; 25, second anti-slip strip; 26, mooring hole; 27, first hinge; 3, decking; 31, decking surface; 32, third anti-slip strip; 33, second eyeboard; 4, hydraulic strut mechanism; 41, second hinge; 42, hydraulic cylinder; 43, third hinge; 5, limiting block; 51, rubber pad; 6, bulkhead; 7, first vehicle deck; 8, second vehicle deck. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0032] Figure 1 and Figure 2 The image shows a wave-blocking ramp device for amphibious operations on a roll-on / roll-off ship, provided in an embodiment of this application. The wave-blocking ramp device includes a ramp body 2, which is obliquely connected to a first vehicle deck 7 and a second vehicle deck 8. The ramp body 2 is welded to the first vehicle deck 7, the second vehicle deck 8, and the bulkheads 6 on both sides to form a fixed hull structure.

[0033] Combination Figure 3 and Figure 4The ramp plate body 2 mainly consists of a ramp plate surface 21, a lower half bottom support member 23, and an upper half bottom support member 24. The lower half of the ramp plate surface 21 has several wave-damping holes 22, the total area of ​​which is 15% of the area of ​​the lower half of the ramp plate surface 21. The wave-damping holes 22 are evenly distributed laterally and symmetrically arranged, ensuring both the structural strength of the ramp plate body 2 and achieving good wave-damping performance. The overall inclination angle of the ramp plate body 2 is 15°. For safety considerations and to facilitate the passage of tracked vehicles, a second anti-slip strip 25 is added to the upper half of the ramp plate surface 21, and the second anti-slip strip 25 is welded onto the ramp plate surface 21. Twelve mooring holes 26 are provided at the connection points of the lower half bottom support member 23 in the lower half of the ramp plate surface 21 for easy mooring of boats. Two first hinges 27 are provided in the middle of the upper end of the ramp board 21 to facilitate hinge connection with the scaffolding 1 and the deck 3.

[0034] Because the lower half of the ramp plate 21 has a relatively dense arrangement of openings, and includes areas with elongated wave-damping holes 22, the hull structure opening design generally avoids structural support at the opening locations to ensure the continuity of the supporting components. Therefore, there is no transverse structural support at the elongated hole locations. All transverse support components of the lower half of the bottom support component 23 utilize transverse bulkhead structures, while the longitudinal and upper half of the bottom support component 24 can be designed conventionally according to the actual ship's longitudinal girder spacing and rib spacing.

[0035] Combination Figure 5 and Figure 6 The lower half of the ramp surface 21 is covered with a ramp 1 to facilitate vehicle passage, and the middle part of the ramp surface 21 and the upper part of the ramp 1 are provided with a paving board 3 for transitional vehicle passage.

[0036] The ramp 1 includes a ramp surface 11 made of the same material as the vehicle deck to support vehicle passage. Two first eyelets 12 are welded to both ends of the ramp surface 11, connecting to two first hinges 27 on the ramp surface 21. First anti-slip strips 13 are welded to the surface of the ramp surface 1. The openings in the lower half of the ramp surface 21 provide passageways for vehicles, but their spacing is fixed. Considering the diversity of transport vehicles and the increased local load caused by wheel tracks at the opening locations in the event of an accident, the ramp 1 covering the lower half of the ramp surface 21 ensures safe passage.

[0037] The structure of the plank 3 is similar to that of the ramp 1, including a plank surface 31. Second eyelets 33 are provided at both ends of the plank surface 31 for connection with two first hinges 27. A third anti-slip strip 32 is provided on the plank surface 31. The plank 3 is normally stationary, with a triangular cross-section. Its main function is to bridge the height difference between the ramp 1 and the ramp surface 21 caused by the thickness of the ramp 1. Therefore, the longitudinal distance of the plank 3 does not need to be too large. The plank 3 is hinged to the ramp body 2 for easy removal and securing.

[0038] Combination Figure 7 The lower half of the ramp body 2 has two sets of hydraulic strut mechanisms 4 for flipping the ramp 1 up and down. The two sets of hydraulic strut mechanisms 4 are laterally distributed at the wave-damping holes 22 at both ends. The hydraulic strut mechanism 4 includes a hydraulic cylinder 42. The bottom end of the hydraulic cylinder 42 is connected to the eye plate on the first vehicle deck 7 through a third hinge 43, and the end of the extension rod of the hydraulic cylinder 42 is connected to the eye plate on the ramp 1 through a second hinge 41. In this way, the hydraulic strut mechanism 4 can operate at the opening position of the ramp surface 21, saving space, and ensuring the fit between the ramp 1 and the ramp surface 21 when falling back.

[0039] Combination Figure 8 There are two sets of limiting blocks 5, which are welded to the side bulkheads 6 respectively. Rubber pads 51 are provided on the limiting blocks 5 at the contact points with the gangway 1, thereby reducing the impact when the gangway 1 is raised and the vibration generated by the continuous wave impact on the gangway 1 during transshipment operations of the roll-on / roll-off ship, thus increasing its service life. The rubber pads 51 are easy to replace; they can be replaced when damaged.

[0040] See Figure 1 When a roll-on / roll-off ship needs to move vehicles at the dock, ramp 1 is in a lowered state, laid flat on the lower half of the ramp surface 21, covering the wave-damping holes 22. Because ramp 1 has a certain thickness, a paving board 3 is added to bridge the height difference caused by its thickness. In this way, vehicles can safely pass through the entire ramp device from the first vehicle deck 7 to the second vehicle deck 8, and finally park on the second vehicle deck 8. When vehicles travel on ramp 1, they still follow the lane positions reserved when the wave-damping holes 22 are opened on the ramp body 2. This operation increases the service life of the entire ramp device, but even if vehicles do not travel in the normal lane or accidentally deviate, it will not cause danger, greatly improving safety. During vehicle transfer operations, the hydraulic strut mechanism 4 is in a relaxed state and will not be damaged.

[0041] See Figure 9When a roll-on / roll-off (Ro-Ro) ship needs to transport displacement boats at sea, the ship needs to reach a certain draft to ensure the boats can follow the seawater into the ship's compartments. In this state, to prevent seawater from impacting the ramp and waves from rising, the hydraulic strut mechanism 4 can raise the ramp 1 to the position of the limiting block 5, exposing the lower half of the ramp surface 21 with wave-damping holes 22. When seawater floods the first vehicle deck 8 of the loading compartment and rushes towards the ramp body 2, the ramp surface 21 can eliminate the wave impact and block some wave rise through the wave-damping holes 22. Simultaneously, the ramp 1, in its raised state, acts as a door to the incoming seawater, further blocking it. Furthermore, under the action of the limiting block 5, even if the ramp 1 is subjected to multiple waves of seawater impact, it will not damage the supporting hydraulic strut mechanism 4; instead, most of the force is transferred to the limiting block 5 and the connected bulkhead 6, thereby improving the safety of the entire system. Once the displacement-type boat has entered the mooring position on the first vehicle deck 8 of the loading compartment, it can be moored to the pre-reserved mooring hole 26 on the ramp plate 21 for securement.

[0042] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A wave-blocking ramp device for amphibious operations on roll-on / roll-off ships, characterized in that, include: The ramp plate body (2) is obliquely connected to the first vehicle deck (7) and the second vehicle deck (8). Wave-damping holes (22) are provided in the lower half of the ramp plate surface (21) of the ramp plate body (2). The ramp (1) is hinged to the middle of the upper end face of the ramp body (2), and can be flipped up and down to cover the lower half of the ramp surface (21); and, The hydraulic strut mechanism (4) is located below the ramp body (2) and is used to drive the ramp (1) to flip up and down. The lower half of the ramp surface (21) is provided with mooring holes (26) for mooring boats.

2. The wave-blocking ramp device according to claim 1, characterized in that, The bulkhead (6) is equipped with a limit block (5) to limit the angle at which the ramp (1) flips upward.

3. The wave-blocking ramp device according to claim 2, characterized in that, A rubber pad (51) is provided at the position where the limiting block (5) contacts the springboard (1).

4. The wave-blocking ramp device according to claim 1, characterized in that, At the hinged position between the scaffold (1) and the ramp board surface (21), a plank (3) is also hinged to facilitate the height difference between the scaffold (1) and the ramp board surface (21).

5. The wave-blocking ramp device according to claim 4, characterized in that, A third anti-slip strip (32) is provided on the surface (31) of the paving board (3).

6. The wave-blocking ramp device according to claim 1, characterized in that, The first anti-slip strip (13) is provided on the surface (11) of the springboard (1).

7. The wave-blocking ramp device according to claim 1, characterized in that, A second anti-slip strip (25) is provided on the upper half of the slope board surface (21).

8. The wave-blocking ramp device according to claim 1, characterized in that, The hydraulic strut mechanism (4) includes a hydraulic cylinder (42), the bottom end of which is hinged to the first vehicle deck (7), and the end of the extension rod of the hydraulic cylinder (42) is hinged to the ramp (1).

9. The wave-blocking ramp device according to claim 1, characterized in that, The ramp plate body (2) is welded to the first vehicle deck (7), the second vehicle deck (8) and the bulkhead (6), while the bottom is supported by supporting components.

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