Intelligent environment-friendly semi-submersible transport ship

Abstract

The utility model discloses an intelligent environment-friendly semi-submersible transport ship, which belongs to the technical field of ship design, and comprises a main ship body, a forecastle, an aftercastle, a plurality of methanol cabins, a propelling system and an intelligent system, the methanol cabins are arranged in the middle of the ship, adopt a double-layer structure or a safety barrier and are separated by groove-shaped bulkheads, and the propelling system is arranged in the middle of the ship. The cabin wall is made of carbon steel with a special coating, an isolation void cabin is arranged between the methanol cabin and other cabins, and a high-pressure ventilation valve of the methanol cabin is arranged at a bow mast; the intelligent system comprises an intelligent sailing system, an intelligent energy efficiency system and an intelligent cabin management system which are arranged on the semi-submersible transport ship. The intelligent environment-friendly semi-submersible transport ship has the advantages of being environmentally friendly, intelligent, efficient and low in operation cost.

Description

Technical Field

[0001] This utility model relates to the field of ship design technology, and more specifically, to an intelligent and environmentally friendly semi-submersible transport vessel. Background Technology

[0002] A semi-submersible transport vessel is a special type of vessel designed for transporting large equipment or cargo such as ships, drilling platforms, and submarines. The main characteristic of these vessels is their ability to perform submersible loading and unloading operations: after the hull deck is lowered to a certain depth below the water level, the floating cargo is moved to a precise position above the deck by tugboats or by the vessel's own towing equipment. Once the semi-submersible vessel has dewatered and surfaced to contact the cargo, it is then secured. Unloading is simply the reverse of loading.

[0003] In future industrial development and energy development, large semi-submersible transport vessels that are green, environmentally friendly, intelligent, and efficient will play a vital role. With the development of the maritime economy and the increasing environmental requirements of the international market for ships, existing semi-submersible transport vessels have shortcomings in terms of fuel selection, environmental performance, intelligence, efficiency, and technical requirements. Methanol, as a clean energy source, has advantages such as low emissions and environmental friendliness; however, the methanol tank design of existing ships poses risks of corrosion and leakage. There is an urgent need for new ships to adopt new technologies to improve ship performance and reduce operating costs to meet the requirements of new regulations. Utility Model Content

[0004] The purpose of this utility model is to provide an intelligent and environmentally friendly semi-submersible transport vessel, which solves the shortcomings of existing semi-submersible transport vessels in terms of fuel selection, environmental performance, intelligence and efficiency, and technical requirements. It features green environmental protection, intelligence and efficiency, and low operating costs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A smart and environmentally friendly semi-submersible transport vessel includes a main hull, a forecastle, a sterncastle, several methanol tanks, a propulsion system, and an intelligent system. The methanol tanks are located in the middle of the vessel and adopt a double-layer structure or safety barrier. The methanol tanks are separated by trough-shaped bulkheads made of specially coated carbon steel. Isolation compartments are set between the methanol tanks and other compartments. The high-pressure vent valves of the methanol tanks are located at the bow mast. The intelligent system includes intelligent navigation, intelligent energy efficiency, and intelligent engine room management systems installed on the semi-submersible transport vessel.

[0007] Furthermore, the main hull is a fully welded steel structure with a streamlined design, including a bow and a stern. The bow is equipped with a bulbous bow, and the stern is a square stern with a double-bottom structure.

[0008] Furthermore, the forecastle is located at the bow of the ship, and the sterncastle is located at the stern of the ship. The sterncastle is equipped with a superstructure and a main engine room.

[0009] Furthermore, the sterncastle is detachable and can be stored in the sterncastle storage area on both sides of the forecastle or in the recessed area in the middle of the forecastle.

[0010] Furthermore, the main hull is equipped with two passageways running through the bow and stern, which connect the main engine room and the propulsion system, respectively.

[0011] Furthermore, the propulsion system adopts a conventional propulsion type with two engines, two shafts, and two propellers, including two sets of direct-pitch propellers, and the propulsion system is equipped with a methanol reserve scheme.

[0012] By adopting the above technical solution, this utility model has the following advantages:

[0013] This invention provides an intelligent and environmentally friendly semi-submersible transport vessel. By incorporating a methanol tank, it offers advantages such as low emissions and environmental friendliness. Through the installation of an intelligent system, including intelligent navigation, intelligent energy efficiency, and an intelligent engine room management system, it optimizes multiple objectives such as navigation time, fuel consumption, and total cost, effectively improving overall ship management, enhancing vessel energy efficiency, and ensuring safe navigation operations. This intelligent and environmentally friendly semi-submersible transport vessel utilizes new technologies to improve vessel performance and reduce operating costs. It is characterized by its green and environmentally friendly nature, intelligent efficiency, and low operating costs. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0015] Figure 1 This is a side view of the intelligent and environmentally friendly semi-submersible transport vessel of this utility model.

[0016] Figure 2 This is a top view of the intelligent and environmentally friendly semi-submersible transport vessel of this utility model.

[0017] Figure 3 This is a cross-sectional view of the bow of the intelligent and environmentally friendly semi-submersible transport vessel of this utility model.

[0018] Reference numerals: 1. Main hull, 2. Propulsion system, 3. Forecourt, 4. Superstructure, 5. Aft deck, 6. Main engine room, 7. Main deck, 8. Methanol tank, 9. High-pressure vent valve, 10. Aft cable compartment, 11. Forecourt recessed area, 12. Aft deck storage area, 13. Main deck sinking area, 14. Energy-saving device. Detailed Implementation

[0019] The technical solution of this utility model will be specifically described below with reference to the accompanying drawings. The detailed features and advantages of this utility model are described in detail in the specific embodiments. The content is sufficient to enable any person skilled in the art to understand the technical content of this utility model and implement it accordingly. Based on the specification, claims and drawings disclosed in this specification, those skilled in the art can easily understand the related objectives and advantages of this utility model.

[0020] A smart and environmentally friendly semi-submersible transport vessel, specifically as follows: Figure 1 , Figure 2 and Figure 3 As shown, the hull includes the main hull 1, forecastle 3, stern deck 5, several methanol tanks 8, propulsion system 2, and intelligent systems. The main hull 1 is 241 meters long, 232.2 meters between perpendiculars, 46.0 meters wide, 14.0 meters deep, with a design draft of 10.4 meters and a maximum diving depth of 29.0 meters. The main hull consists of a continuous main deck 7, double bottom tanks, and single-hull side tanks. The vessel will include a raised forecastle deck, living quarters, and a bridge deckhouse. The main deck 7 is a fully open deck, accommodating large gantry cranes for roll-on / roll-off loading and unloading from the stern or both sides during berthing. The main hull 1 is entirely welded from steel, featuring a streamlined design, including a bow and stern. The bow has a bulbous bow, and the stern is a square stern with a double bottom structure. The forecastle 3 is located at the bow, the superstructure 4 is located on top of the forecastle 3, and the sterncastle 5 is located at the stern. This semi-submersible transport vessel can transport gantry cranes, large modules, and large ships in unlimited global navigation areas, and can also be used for offshore wind turbine transport and auxiliary wind power installation. The semi-submersible transport vessel has a maximum deadweight tonnage of 65,000 tons and can perform lateral and stern-mounted skid loading and unloading of large cargo via slipways, with a maximum skid loading and unloading capacity of no less than 25,000 tons. It can transport and install the superstructure modules of the leg structures using a floating method, with a maximum installable module weight of no less than 33,000 tons. The vessel has the ability to submerge to a depth of 15.0 meters below the water surface, using this method to float / unload floating cargo.

[0021] Main deck 7 is used for the sliding and roll-on / roll-off loading of large cargo without any obstruction. The open deck is at least 200 meters long and has an effective loading area of ​​at least 9,000 square meters.

[0022] This intelligent and environmentally friendly semi-submersible transport vessel adopts a stern-engine design, with the main engine room 6 located at the stern and the sterncastle 5 located on both sides of the stern, and is detachable. When oversized cargo is being rolled or slid-loaded at the stern, the sterncastle 5 can be temporarily removed if necessary. The sterncastle 5 can be stored in the sterncastle storage area 12 on both sides of the forecastle 3 or in the forecastle recess area 11 in the middle of the forecastle 3.

[0023] The main deck 7 has a forecastle at the bow and a detachable, movable pontoon on each of the port and starboard sides at the stern. The forecastle 3 houses the funnel and engine room ventilation ducts. It also contains storage rooms, forklift workshops, elevator shafts, stairwells, cable rooms, and ballast tanks. Below the forecastle 3, the interior spaces include ballast tanks, fuel tanks, freshwater tanks, engine room, propeller room, bow and stern thruster compartments, steering gear room, and winch room.

[0024] Two through passages running from bow to stern are provided within the main hull 1, connecting the main engine room 6 and the propulsion system 2 respectively. A methanol tank 8 is reserved midway between the ships. The number of methanol tanks 8 is not fixed; if two or more methanol tanks are arranged adjacently, they can be separated by trough-shaped bulkheads. Because methanol is highly corrosive to ordinary carbon steel, the bulkheads of the methanol tanks 8 are typically made of specially coated carbon steel to enhance corrosion resistance. To reduce the coating area and mitigate corrosion problems caused by the complex structure during ship operation, the bulkheads of the methanol tanks 8 should be as smooth as possible. An isolation compartment should be provided between the methanol tanks 8 and other compartments (cargo oil tanks) to reduce the risk of cross-contamination. Simultaneously, the methanol tanks typically employ a double-layer structure or safety barrier to effectively prevent leakage and spread, improving ship operational safety. Due to the high safety requirements of the methanol tanks 8 and their double-layer structure, access routes must be strictly planned during ship design. In practical applications, access routes to the methanol tanks 8 and their double-layer structure are generally designed in open areas to facilitate ventilation and safety management. Furthermore, to ensure structural integrity and prevent safety hazards, hot welding is prohibited on the outer walls of the double-layered structure of the methanol tank during ship operation. If hot welding is absolutely necessary, an additional double-layered structure must be installed to ensure safety.

[0025] The high-pressure vent valve 9 of the methanol tank 8 is located at the bow mast. Since the outlet of the high-pressure vent valve 9 is a dangerous area, the high-pressure vent valve 9 is arranged as high as possible and extended towards the bow, so that the superstructure 4 and the forecastle working area can be kept as far away from the dangerous area as possible.

[0026] Propulsion System 2 employs a conventional twin-engine, twin-shaft, twin-propeller propulsion configuration. It includes two sets of direct-pitch propellers, and two sets of lateral shaft-tunnel propellers are located at both the bow and stern. The ship is equipped with an IMO-compliant Level 2 dynamic positioning system for auxiliary positioning, meeting the requirements of Level 2 dynamic positioning. Both Propulsion System 2 and the generator sets in Engine Room 6 utilize a methanol-reserved configuration. Engine Room 6 houses a low-speed, two-stroke methanol-reserved dual-fuel diesel engine with a shaft-driven generator, capable of meeting the ship's power needs under normal navigation conditions. Additionally, three methanol-reserved diesel generator sets are configured to provide auxiliary power to the entire ship when the shaft-driven generator is not operational. Both the diesel generator sets and Propulsion System 2 are designed for methanol dual-fuel capability, and their emissions meet MARPOL 73 / 78 Annex VI regarding NOx emissions Tier III requirements and comply with domestic environmental protection requirements GB15097-2016 C2, making them suitable for navigation and operations in unlimited global waters. Compared with electric propulsion, direct diesel engine propulsion has lower investment costs, lower fuel consumption, lower operating costs, and lower maintenance costs.

[0027] This intelligent and environmentally friendly semi-submersible transport vessel is equipped with two independent ballast systems: one compressed air ballast / discharge system, using an air compressor to operate the ballast water tanks below the main deck; and one water pump ballast / discharge system, used for the ballast tanks above the main deck. The ballast system can ensure that the time required to rise from maximum diving depth to design draft does not exceed 4 hours. The ballast tanks of this intelligent and environmentally friendly semi-submersible transport vessel are divided into upper, middle, and lower layers, separated by two watertight longitudinal bulkheads running through the bow and stern. While ensuring damage stability, the number of ballast tanks has been optimized as much as possible, thereby optimizing the piping layout. The advantage of the upper, middle, and lower ballast tank configuration is that when loading cargo with a low center of gravity, the vessel has a high GM value, good stability, and a short roll period, but the comfort level is relatively poor. In this case, water can be added to the top ballast tank to reduce the GM value, thereby increasing the roll period and improving the comfort level of the vessel.

[0028] To achieve a fully unobstructed main deck, the vent overflow pipes for the ballast tanks cannot be directly installed on the main deck. A special design is required. The solution for this intelligent and environmentally friendly semi-submersible transport vessel is as follows: the ballast tank vent main is located in a "V-shaped area" on both sides of the midship longitudinal bulkhead, below the main deck, and then extends from the forecastle deck to the main deck, achieving ventilation. This "V-shaped area" is located above the vessel's maximum breach waterline, ensuring that even if the vent pipe ruptures and floods, it will not adversely affect the vessel's stability. This arrangement saves space and significantly reduces the use of piping and valves.

[0029] The stern cable compartment 10 inside the main hull is equipped with mooring winches, and the necessary bollards are located in the main deck sinking area 13. This arrangement ensures that the main deck 7 is completely unobstructed.

[0030] Energy-saving devices 14, such as guide pipes and anti-vortex fins, are installed at the front and rear of the propeller to improve the water flow around the propeller and increase propulsion efficiency. Optimized water flow conditions can also reduce wear on the propeller and propulsion system, extending the service life of the equipment.

[0031] The intelligent and environmentally friendly semi-submersible transport vessel's intelligent system includes intelligent navigation, intelligent energy efficiency, and intelligent engine room management systems. It optimizes management of multiple objectives such as sailing time, fuel consumption, and total cost, which can effectively improve the overall management level of the ship, enhance the ship's energy efficiency, and ensure the safety of navigation operations.

[0032] In addition, this intelligent and environmentally friendly semi-submersible transport vessel is equipped with a stress and strain monitoring system to monitor the stress and strain levels of the hull structure in real time, ensuring the safety of the vessel's operation.

[0033] Finally, it should be noted that although the present invention has been described with reference to specific embodiments, those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Various equivalent changes or substitutions can be made without departing from the concept of the present invention. Therefore, any changes or modifications to the above embodiments within the essential spirit of the present invention will fall within the scope of the claims of the present invention.

Claims

1. An intelligent environmentally friendly semi-submersible carrier vessel, characterized in that, The methanol semi-submersible transport ship comprises a main hull, a bow house, a stern house, a plurality of methanol cabins, a propulsion system and an intelligent system, the methanol cabins are arranged in the middle part of the ship and adopt a double-layer structure, the methanol cabins are separated by tank-shaped bulkheads, the material of the bulkheads is carbon steel coated with a corrosion-resistant layer, an isolation empty cabin is arranged between the methanol cabins and other cabins, and a high-pressure air vent valve of the methanol cabin is arranged at the bow mast; the intelligent system comprises intelligent navigation, intelligent energy efficiency and intelligent engine room management systems arranged on the semi-submersible transport ship.

2. An environmentally friendly semi-submerged transport ship as claimed in claim 1, characterized in that The main hull is a steel fully-welded structure and adopts a streamline design, comprising a bow part and a stern part, the bow part is provided with a bulbous bow, and the stern part is a square stern and is provided with a double-bottom structure.

3. An environmentally friendly semi-submerged transport ship as claimed in claim 2, characterized in that The bow house is arranged at the bow of the ship, and the stern house is arranged at the stern of the ship and is provided with superstructure and a main engine cabin.

4. An environmentally friendly semi-submerged transport ship as claimed in claim 3, characterized in that The stern house is detachable, and is stored in a stern house storage area on both sides of the bow house or a bow house recessed area in the middle part of the bow house.

5. An environmentally friendly semi-submerged transport ship as claimed in claim 3, characterized in that Two through bow-stern passages are arranged in the main hull, and the passages are connected with the main engine cabin and the propulsion system respectively.

6. An environmentally friendly semi-submerged transport ship as claimed in claim 5, characterized in that The propulsion system adopts a double-engine, double-shaft and double-propeller conventional propulsion type, comprising two sets of direct-drive propellers, and is provided with a methanol reservation scheme.

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