Roll-on-roll-off ship and air supply system arrangement structure thereof

Abstract

The invention provides a roll-on-roll-off ship and an air supply system arrangement structure thereof. The roll-on-roll-off ship comprises a ship body; a main deck layer; the lower vehicle cabin layer is located below the main deck layer, comprises the air supply system arrangement structure for the roll-on-roll-off ship and the driving system and is located in the ship body. The gas supply system arrangement structure comprises: a tank comprising a tank side wall; the ramp is arranged on the broadside of the tank cabin; the cabin is arranged at the tail part or the middle part of the roll-on-roll-off ship and comprises a cabin front end wall; the gas supply equipment room is arranged below the ramp and located in an area defined by the front end wall of the cabin, the side wall of the tank cabin and the inner wall of the roll-on-roll-off ship, and a gas pipeline is arranged at the bottom of the gas supply equipment room; and the air supply system is arranged in the air supply equipment room. The problem that space is wasted due to the fact that a gas supply system occupies the area of a vehicle deck is solved, the vehicle carrying capacity of a ship is improved, and meanwhile it is guaranteed that the ship runs safely when clean and economical low-flash-point fuel is adopted.

Description

Technical Field

[0001] This invention belongs to the field of roll-on / roll-off (Ro-Ro) ship technology, specifically relating to a Ro-Ro ship and its air supply system arrangement structure. Background Technology

[0002] Currently, roll-on / roll-off ships using low flashpoint fuels typically require a separate area within the vehicle hold to house the gas supply equipment, in order to meet the space requirements of units such as high-pressure gas supply, low-pressure gas supply, and evaporative gas treatment. However, this arrangement directly occupies a significant amount of vehicle deck space, resulting in a reduction in the number of vehicles the ship can carry and impacting operational economics.

[0003] To address this issue, existing technologies reduce space requirements by optimizing equipment integration or compressing equipment size. However, limited by equipment functionality and maintenance needs, the space reduction effect is limited and may lead to maintenance inconvenience or safety hazards. Therefore, how to rationally arrange the gas supply equipment room without sacrificing vehicle carrying capacity has become a key challenge in the design of low flash point fuel roll-on / roll-off ships. Summary of the Invention

[0004] This invention is made to solve the above-mentioned problems, and its purpose is to provide a roll-on / roll-off ship and its air supply system layout structure, which minimizes the space occupied by the air supply system on the vehicle loading space while ensuring safety.

[0005] This invention provides a gas supply system layout structure for a roll-on / roll-off (Ro-Ro) ship, characterized by the following features: a tank compartment, including a tank compartment sidewall; a ramp, disposed on the side of the tank compartment, the ramp having an inclination angle of 7~10°; an engine room, disposed at the stern or midsection of the Ro-Ro ship, including an engine room forward wall; a gas supply equipment room, disposed below the ramp, within the area enclosed by the engine room forward wall, the tank compartment sidewall, and the inner wall of the Ro-Ro ship, the bottom of the gas supply equipment room being provided with gas pipelines; and a gas supply system, disposed within the gas supply equipment room.

[0006] In one embodiment of the present invention, the air supply system arrangement structure for a roll-on / roll-off ship further includes: an isolated empty compartment, disposed between the air supply equipment room and the engine room, and between the air supply equipment room and the inner wall of the roll-on / roll-off ship.

[0007] In one embodiment of the present invention, the front wall of the engine room and the inner wall of the roll-on / roll-off ship are respectively provided with a wall reinforcement structure facing the isolation compartment on the side adjacent to the isolation compartment.

[0008] In one embodiment of the present invention, the interior of the isolation chamber includes an airlock and a buffer room arranged adjacent to each other. The airlock is ventilated by mechanical positive pressure, while the buffer room is ventilated by natural ventilation.

[0009] In one embodiment of the present invention, the top of the isolation chamber is provided with an openable and closable watertight cover.

[0010] In one embodiment of the present invention, the watertight hatch has at least two layers.

[0011] In one embodiment of the present invention, the height of the highest point of the gas supply equipment room is not less than 4250mm, and the height of the lowest point is not less than 2050mm.

[0012] In one embodiment of the present invention, the ramp is a movable ramp, one end of which is movably connected via a pivot, and the other end is detachably connected, allowing the movable ramp to rise and fall.

[0013] In one embodiment of the present invention, the gas supply system includes a high-pressure gas supply unit, a low-pressure gas supply unit, an evaporative gas treatment unit, and a main unit gas supply unit.

[0014] The present invention also provides a roll-on / roll-off (Ro-Ro) ship, characterized by comprising: a hull; a main deck layer; a lower vehicle compartment layer located below the main deck layer, including the aforementioned air supply system arrangement structure for Ro-Ro ships; and a drive system located inside the hull for driving the hull.

[0015] The role and effect of invention

[0016] According to the roll-on / roll-off (Ro-Ro) ship and its gas supply system layout structure of the present invention, by setting up tank tanks, ramps, engine rooms, and gas supply equipment rooms, the gas supply equipment rooms are integrated into the existing space structure of the Ro-Ro ship, making full use of the trapezoidal space under the ramps. Through precise control of the ramp angle, multiple protective measures for isolating empty compartments, design of the positions of movable ramps and watertight hatches, and refined layout of the internal space of the gas supply equipment rooms, the problem of space waste caused by the gas supply system layout occupying vehicle deck area is not only solved, but the ship's vehicle carrying capacity is also improved. At the same time, it also ensures the operational safety of the ship when using clean and economical low flash point fuels. It has important engineering practical value for promoting the application of low flash point fuels in space-sensitive ship types such as Ro-Ro ships. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a sectional view of the side of a roll-on / roll-off ship in an embodiment of the present invention.

[0019] Figure 2 This is a top cross-sectional view of a roll-on / roll-off ship in an embodiment of the present invention.

[0020] Figure 3 This is a front view cross-sectional view of a roll-on / roll-off ship in an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures 100-Ro-Ro ship, 101-Gas supply system layout structure, 102-Hull, 103-Main deck, 104-Lower vehicle compartment, 105-Tank compartment, 106-Tank compartment sidewall, 107-Ramp, 108-Engine room, 109-Engine room forward bulkhead, 110-Gas supply equipment room, 111-Gas supply system, 112-Isolation compartment, 113-Watertight hatch cover, 114-Gas pipeline, 115-Airlock, 116-Buffer room. Detailed Implementation

[0022] The technical solutions disclosed in this invention will be described in detail below with reference to specific embodiments.

[0023] 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 only some embodiments of the present invention, and not all 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 scope of protection of the present invention.

[0024] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0025] In this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used only for descriptive and distinguishing purposes and should not be construed as indicating or implying relative importance.

[0026] To make the technical means, creative features, objectives and effects of the present invention easy to understand, the following embodiments, in conjunction with the accompanying drawings, specifically illustrate the layout structure of the roll-on / roll-off ship and its air supply system of the present invention.

[0027] like Figures 1-3As shown, this invention provides a roll-on / roll-off (Ro-Ro) ship 100 and its gas supply system arrangement structure 101. The Ro-Ro ship 100 achieves both efficient utilization of the vehicle deck area and gas safety protection by arranging the gas supply equipment room 110 within a trapezoidal space below the ramp 107 from the main deck to the lower vehicle deck, and by incorporating multiple safety structures such as an isolation compartment 112, an airlock 115, and a buffer compartment 116. The Ro-Ro ship 100 of this invention can be widely applied to various Ro-Ro transport vessels using low-flash-point fuels such as liquefied natural gas, liquefied petroleum gas, methanol, or ammonia as propulsion, and is particularly suitable for ocean-going Ro-Ro ships 100, car carriers, and passenger Ro-Ro ships with stringent requirements for vehicle carrying capacity and safety.

[0028] Specifically, the application scenarios of the roll-on / roll-off (Ro-Ro) ship 100 of this invention include, but are not limited to, cargo Ro-Ro ships, car carriers, passenger Ro-Ro ships, dual-use military / civilian Ro-Ro ships, and special-purpose Ro-Ro ships. Cargo Ro-Ro ships can be used for transoceanic transportation of heavy trucks, construction machinery, and other Ro-Ro cargo. This invention maximizes the cargo loading capacity of the vehicle compartment while ensuring the safe operation of the gas supply system 111. Car carriers can be used for bulk sea transport of imported and exported vehicles. This invention, by rationally utilizing the space under the ramp 107 to arrange the gas supply equipment, can significantly increase the number of vehicles loaded per voyage and enhance operational economic efficiency. Passenger Ro-Ro ships undertake the task of transporting passengers and vehicles simultaneously, requiring extremely high safety standards. The combined protective structure of the isolated empty compartment 112, airlock 115, and buffer compartment 116 provided by this invention can provide reliable safety assurance for passenger Ro-Ro ships using low-flash-point clean fuels. Dual-use military / civilian Ro-Ro ships need to balance rapid wartime deployment and economical peacetime operation. The high space utilization design of this invention can meet their needs for flexibly loading different equipment and supplies. Special purpose roll-on / roll-off vessels, such as offshore wind power maintenance vessels and research vessels, have compact spaces and need to meet special specifications. The compact layout scheme of this invention can provide a feasible technical path for these vessel types to carry low flash point fuel systems.

[0029] like Figures 1-3 As shown, the roll-on / roll-off (Ro-Ro) ship 100 and its air supply system arrangement structure 101 of the present invention utilize the internal space of the Ro-Ro ship 100 to arrange the air supply equipment room 110 in a specific area. The Ro-Ro ship 100 includes: a hull 102, a main deck 103, a lower vehicle deck 104, and a drive system. The main deck 103 is located at the top of the hull 102 and includes a bridge, living quarters, and a cargo deck, which is used for passage and parking of vehicles. The lower vehicle deck 104 is located below the main deck 103 and includes the air supply system arrangement structure 101 for the Ro-Ro ship 100. The drive system is located inside the hull 102 and is used to drive the hull 102.

[0030] Specifically, the gas supply system layout structure 101 for the roll-on / roll-off ship 100 includes a tank 105, a ramp 107, an engine room 108, a gas supply equipment room 110, and a gas supply system 111. The tank 105 is used to store low flash point fuels, such as liquefied natural gas or liquefied petroleum gas, and has clearly defined tank sidewalls 106 to form an independent enclosed area. The ramp 107, serving as a passage connecting the main deck level 103 and the lower vehicle deck level 104, is located on the side of the tank 105, avoiding the ramp 107 from penetrating the tank 105 or other important structures, thus making more regular use of space. One end of the ramp 107 connects to the bottom of the main deck level 103, and the other end connects to the bottom of the lower vehicle deck level 104, forming a slope that allows vehicles to pass smoothly. In this invention, to ensure the safety and comfort of vehicle passage while also utilizing the space below, the inclination angle of ramp 107 is controlled between 7 and 10°. This ensures sufficient climbing ability and braking safety for various roll-on / roll-off vehicles, while effectively controlling the horizontal projection length of ramp 107 itself, reducing its occupation of deck area. It is worth noting that the inclination angle is selected from an optimal range derived after comprehensive consideration of vehicle engineering and ship structural design. As one implementation method, for roll-on / roll-off ships 100 primarily used for small vehicles, the inclination angle of ramp 107 can be set to close to 7° to provide a smoother passage experience; for roll-on / roll-off ships 100 primarily used for large trucks or engineering vehicles with strong climbing capabilities, the inclination angle of ramp 107 can be set to close to 10°, thereby further shortening the length of ramp 107 and saving space.

[0031] like Figures 1-3 As shown, the engine room 108, serving as the ship's power core, is located at the stern or midway of the lower vehicle deck 104. The engine room 108 houses key equipment such as the main engine and generator sets, and has a clearly defined forward bulkhead 109 at its front end for physical isolation from adjacent compartments.

[0032] like Figures 1-3As shown, in this invention, the gas supply equipment room 110 is located below the ramp 107 and can be used to house the gas supply system 111 that supports the low flash point fuel engine. Specifically, the gas supply equipment room 110 is located in the area enclosed by the engine compartment front wall 109, the tank compartment side wall 106, and the inner wall of the lower vehicle compartment 104. This area forms a relatively independent and regular trapezoidal or approximately rectangular space. Since the ramp 107 is inclined, the space below it presents a trapezoidal cross-section that gradually increases in height from one end to the other. This invention utilizes irregularly shaped space and transforms it into an ideal location for arranging the gas supply equipment room 110 through the arrangement of various components. A gas pipeline 114 is arranged at the bottom of the gas supply equipment room 110, which is responsible for delivering the treated fuel to the engine in the engine compartment 108. In this invention, the gas pipeline 114 is arranged below the bottom platform of the gas supply equipment room 110, which not only realizes the efficient layered utilization of space, but also facilitates the inspection and maintenance of the pipeline.

[0033] As one implementation method, to maximize space utilization and ensure stable equipment operation, the highest point of the gas supply equipment room 110 shall be no less than 4250 mm, and the lowest point shall be no less than 2050 mm. The upper limit of 4250 mm provides sufficient space for the vertical layout and maintenance of large equipment, including high-pressure gas tanks, heat exchangers, etc.; while the lowest point of 2050 mm ensures that technicians can carry out normal passage and basic operations within the gas supply equipment room 110 without being unable to work due to the space being too low.

[0034] As a further embodiment, the gas supply system layout structure 101 may also include an isolation chamber 112. The isolation chamber 112 is disposed between the gas supply equipment room 110 and the engine room 108, and between the gas supply equipment room 110 and the inner wall of the lower vehicle compartment 104. The isolation chamber 112 is an empty chamber primarily used to establish a physical barrier between hazardous and safe areas. In this embodiment, it is mainly used to isolate the gas supply equipment room 110, the engine room 108, and the vehicle compartment. Therefore, even if a fuel leak occurs in the gas supply equipment room 110, the isolation chamber 112 can effectively prevent the leaked gas from directly diffusing into the engine room 108 or the vehicle compartment, thereby avoiding catastrophic consequences such as fire or explosion. As a preferred embodiment, the width of the isolation chamber 112 is not less than 600 mm, ensuring isolation effectiveness while meeting regulatory requirements.

[0035] As a further implementation, to further enhance the structural strength and safety of the isolation chamber 112 while ensuring that the internal space of the gas supply equipment room 110 is not encroached upon, the present invention also optimizes the structure of the adjacent bulkheads of the isolation chamber 112. On the side of the inner wall of the engine compartment front wall 109 and the lower vehicle compartment 104 adjacent to the isolation chamber 112, respectively, bulkhead reinforcement structures facing the isolation chamber 112 are provided. By placing these reinforcement structures facing inwards towards the isolation chamber 112, the space of the gas supply equipment room is ensured, allowing the reinforcement structures to protrude into the internal space of the isolation chamber 112. On the one hand, the reinforcement structures enhance the strength and rigidity of the bulkheads, meeting structural safety requirements; on the other hand, the inner wall of the gas supply equipment room 110 remains flat without any protrusions, thereby ensuring the continuity of equipment layout and maximizing space utilization. It is worth noting that this invention does not limit the specific types and arrangements of the reinforcement structures. The bulkhead reinforcement structure can be vertically or horizontally arranged stiffeners, steel column stiffeners, anchor plates, etc., and can also use different forms of steel, such as bulb flats, angle steel, or T-shaped steel. The specific dimensions, quantity, and spacing are not specifically limited by this invention and can be optimized based on the specific structural stress analysis results. For example, steel column stiffeners can be placed only in the most unfavorable connection node area, or they can be evenly arranged at a certain spacing. Similarly, the number of transverse stiffeners on both sides of the anchor plate can be three, or two or four depending on the calculation requirements. Its core function is to ensure local stability of the anchor points and prevent local buckling during prestressing. Any structure that achieves the reinforcement purpose should be considered an equivalent alternative to this invention.

[0036] In another preferred embodiment, to further enhance the safety protection level of the isolation chamber 112, the present invention further divides the interior of the isolation chamber 112 into adjacent airlocks 115 and buffer zones 116. Airlocks 115 and buffer zones 116 together constitute a transition zone from the vehicle compartment or other safe areas into the gas supply equipment room 110. Airlocks 115 employ mechanical positive pressure ventilation, continuously supplying fresh air to them via a fan, ensuring that the internal air pressure of airlocks 115 is always higher than that of the adjacent gas supply equipment room 110 and buffer zone 116. Therefore, even in the event of a gas leak, the high-pressure airlocks 115 can prevent gas from flowing in, ensuring that no dangerous gas spreads when personnel enter or exit. Buffer zones 116 employ natural ventilation, serving as an additional buffer area to further dilute or expel any potentially minor gas infiltration. Through the step-by-step isolation of these two airtight spaces, a reliable gas leak protection system is constructed, which can minimize the spread of dangerous gas into other safe areas.

[0037] like Figure 1As shown, the present invention also provides an openable and closable watertight cover 113 on the top of the isolation chamber 112. When it is necessary to hoist, repair, or replace large components in the gas supply equipment room 110, the watertight cover 113 can be opened to form a vertical hoisting channel. As one embodiment, in order to ensure a safer double protection when open, the watertight cover 113 is provided with at least two layers. The present invention does not impose specific limitations on the specific structural form of the watertight cover 113; the watertight cover 113 can be one or more combinations of hinged, sliding, roller shutter, or folding types. Any technical solution that can achieve double protection through multiple layers when open falls within the protection scope of the present invention. For example, a hinged main hatch and a quick-opening auxiliary hatch can be installed. When hoisting operations are required, the roll-on / roll-off ship 100 can be docked in port first, the upper movable ramp 107 can be raised or moved, and then the main hatch and auxiliary hatch can be opened in sequence to form a vertical passage. Large spare parts can then be hoisted into or out of the air supply equipment room 110 through this vertical passage. This cleverly solves the problem of maintaining large equipment in a closed compartment and greatly improves the maintainability of the system.

[0038] like Figure 1 As shown, the ramp 107 can be a movable ramp 107. One end of the movable ramp 107 is movably connected to the bottom of the main deck layer 103 via a pivot, while the other end is detachably fixed to the bottom of the lower vehicle compartment layer 104, thus allowing the ramp 107 to connect the main deck layer 103 and the lower vehicle compartment layer 104. When the movable ramp 107 is in the lowered state, its lower end is fixed, forming a stable ramp for vehicle passage. When large equipment needs to be hoisted or special operations are required in the space below the ramp 107, the detachable end of the movable ramp 107 can be released, and it can be slowly raised using a hydraulic or electric winch until it is close to the bottom of the main deck layer 103 or reaches a higher angle. At this time, the space originally covered by the ramp 107 is exposed, forming a vertical passage connecting with the watertight hatch 113 on top of the isolated empty compartment 112. Compared with the fixed ramp 107, the design of the movable ramp 107 of this invention brings great flexibility in space operation. It is worth noting that this application does not limit the specific driving method and lifting mechanism of the movable ramp 107. It can be driven by a hydraulic cylinder, a wire rope winch, or a gear and rack, as long as it can achieve smooth lifting and reliable locking of the ramp 107.

[0039] In one implementation, the gas supply system 111 may specifically include a high-pressure gas supply unit, a low-pressure gas supply unit, a BOG (Battery Oxide) treatment unit, and a main engine gas supply unit. The high-pressure gas supply unit is primarily used to supply fuel to the main engine, which requires high-pressure gas; the low-pressure gas supply unit is used to supply fuel to equipment such as four-stroke engines or generators; the BOG treatment unit is responsible for treating the naturally evaporating BOG in the fuel tank, reliquefying and pressurizing it for engine use, or treating it through a combustion device; the main engine gas supply unit regulates the pressure, temperature, and flow rate of the fuel before it enters the main engine. The high-pressure gas supply unit, low-pressure gas supply unit, BOG treatment unit, and main engine gas supply unit are arranged sequentially along the ship's length in the gas supply equipment room 110 according to equipment height. For example, taller equipment can be arranged near the higher end of the ramp 107, and lower equipment near the lower end, adapting to the trapezoidal profile of the space below the ramp 107 and maximizing space utilization.

[0040] As a further implementation, the gas supply equipment room 110 also includes a maintenance passage and space to ensure long-term reliable operation of the system and convenience of daily maintenance. The maintenance passage and space ensure that maintenance personnel can safely and conveniently access every component requiring regular inspection or repair. The width of the maintenance passage is typically no less than 600 mm, while the maintenance space must ensure sufficient clearance above or around the equipment to facilitate tool use and disassembly / reassembly work. In one implementation, the layout design of the gas supply equipment room 110 follows the principles of functional zoning and unified operating surfaces, concentrating all frequently operated instruments and valves on the side facing the maintenance passage to improve the efficiency of daily inspections and operations.

[0041] As a further implementation, to ensure the safe operation of the gas supply system 111, the gas supply system 111 of the present invention may also include a safety monitoring device. For example, multiple combustible gas detectors, flame detectors, and alarms may be installed in the gas supply equipment room 110. The combustible gas detectors and flame detectors are linked with the alarm; once a gas leak or fire is detected, the alarm can immediately issue an audible and visual alarm and automatically cut off the gas pipeline 114, activate ventilation, or release extinguishing media according to preset logic. Furthermore, the gas supply equipment room 110 may also be equipped with a mechanical ventilation system that communicates with the outside atmosphere, used to maintain air circulation during normal operation and to quickly replace any combustible gas mixture present in the event of a leak.

[0042] In the prior art, a complete rectangular area needs to be carved out within the vehicle compartment of a roll-on / roll-off ship 100 to construct a gas supply equipment room 110, thereby achieving the complete layout of the gas supply system 111. This may require sacrificing deck area capable of accommodating 10-20 cars. Based on the gas supply system layout structure 101 of this invention, the gas supply equipment room 110 is cleverly placed in the space originally covered by a 7-10° ramp 107. The gas supply equipment room 110 utilizes the bottom of the ramp 107 as its top surface, the engine room front wall 109 and the tank compartment side wall 106 as two sides, and the inner wall of the lower vehicle compartment 104 as another side, forming a sufficient space. The design of the isolated empty compartment 112 and the reinforced bulkhead structure not only minimizes the spread of hazardous gases into other safe compartments but also ensures the flatness of the inner wall of the gas supply equipment room 110. The isolation chamber 112 is further divided into an airlock 115 and a buffer room 116 by an airtight door. The airlock 115 is equipped with an air supply duct to maintain positive pressure.

[0043] The operation of the roll-on / roll-off ship 100 of the present invention during the maintenance of large equipment is as follows: When a heat exchanger up to 3 meters high needs to be replaced during the maintenance process, the worker first moors the roll-on / roll-off ship 100 securely, raises the movable ramp 107, climbs to the top of the isolated empty compartment 112 in the lower vehicle compartment 104, and opens the two watertight compartment covers 113 in sequence to form a vertical hoisting channel directly to the air supply equipment room 110. Using the crane on the ship or the temporarily erected lifting equipment, the old spare parts can be hoisted out and the new spare parts can be hoisted in. The whole process is safe and efficient, and will not cause any interference to other areas of the lower vehicle compartment 104.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An air supply system arrangement structure for a roll-on / roll-off ship, characterized in that, include: Tank hold, including tank hold sidewalls; A ramp is provided on the side of the tank compartment, and the ramp has an inclination angle of 7 to 10°. Engine room, located at the stern or midships of a roll-on / roll-off ship, including the forward bulkhead of the engine room; The gas supply equipment room is located below the ramp, within the area enclosed by the front wall of the engine room, the side wall of the tank compartment, and the inner wall of the roll-on / roll-off ship. Gas pipelines are arranged at the bottom of the gas supply equipment room. The gas supply system is located in the gas supply equipment room.

2. The air supply system arrangement structure for roll-on / roll-off ships according to claim 1, characterized in that, Also includes: An isolation compartment is provided between the gas supply equipment room and the engine room, and between the gas supply equipment room and the inner wall of the roll-on / roll-off ship.

3. The air supply system arrangement structure for roll-on / roll-off ships according to claim 2, characterized in that: The front wall of the engine room and the inner wall of the roll-on / roll-off ship, on the side adjacent to the isolation compartment, are respectively provided with a wall reinforcement structure facing the isolation compartment.

4. The air supply system arrangement structure for roll-on / roll-off ships according to claim 2, characterized in that: The interior of the isolation chamber includes an adjacent airlock and a buffer room. The airlock uses mechanical positive pressure ventilation, while the buffer room uses natural ventilation.

5. The air supply system arrangement structure for roll-on / roll-off ships according to claim 2, characterized in that: The top of the isolation chamber is equipped with an openable and closable watertight cover.

6. The air supply system arrangement structure for roll-on / roll-off ships according to claim 5, characterized in that: The watertight hatch has at least two layers.

7. The air supply system arrangement structure for roll-on / roll-off ships according to claim 1, characterized in that: The height of the highest point of the gas supply equipment room shall not be less than 4250mm, and the height of the lowest point shall not be less than 2050mm.

8. The air supply system arrangement structure for roll-on / roll-off ships according to claim 1, characterized in that: The ramp is a movable ramp, with one end connected by a pivot and the other end detachably connected, allowing it to rise and fall.

9. The air supply system arrangement structure for a roll-on / roll-off ship according to claim 1, characterized in that: The gas supply system includes a high-pressure gas supply unit, a low-pressure gas supply unit, an evaporative gas treatment unit, and a main unit gas supply unit.

10. A roll-on / roll-off ship, characterized in that, include: hull; Main deck level; The lower vehicle deck, located below the main deck, includes the air supply system arrangement structure for a roll-on / roll-off ship as described in any one of claims 1 to 9; A drive system, located inside the hull, is used to drive the hull.

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