Open container ship

Abstract

The open container ship relates to the technical field of ships and comprises a ship body, a plurality of cargo holds with open upper ends are arranged in the middle of the ship body in the length direction of the ship body, and a stern main deck, a stern platform and a stern cabin bottom are sequentially arranged at the tail end of the ship body from top to bottom; a supporting layer is arranged on the stern main deck, an air supply module is detachably and fixedly installed on the supporting layer, a main generator module detachably and fixedly installed on the stern main deck is arranged below the supporting layer, a frequency converter room and a power storage battery room are arranged on the stern platform, and a propelling cabin is arranged at the bottom of the stern cabin. A direct-current bus distribution board is arranged between the frequency converters, a storage battery pack is arranged between the power storage batteries, and two propulsion motors are arranged in the propulsion cabin; the gas supply module is connected with the main generator module to supply LNG fuel, the main generator module is connected with the storage battery pack through the direct-current bus distribution board, and the storage battery pack is connected with the propulsion motor. The LNG tank box and the box type power unit are directly and integrally replaced, and the replacement efficiency and the cruising ability of the ship are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and in particular to an open container ship. Background Art

[0002] An open container ship is a container ship without hatch covers. It is used to transport containers and facilitates the loading and unloading of containers, effectively improving loading and unloading efficiency. Conventional open container ships use diesel engines as power sources to drive propellers. The diesel engines are installed in the propulsion cabin. When the diesel engine fails, it is necessary to go to the propulsion cabin for maintenance. When it needs to be replaced, it is inconvenient to remove the diesel engine from the propulsion cabin, which greatly affects the navigation efficiency of the open ship. In addition, as the requirements of the shipping industry for green environmental protection continue to increase, diesel engine drive will increasingly fail to meet the green and environmental navigation needs. Therefore, it is necessary to redesign an open container ship to effectively improve the ship's endurance and navigation efficiency and meet the green and environmental navigation needs. Summary of the invention

[0003] The purpose of the present invention is to provide an open container ship with a modular design of LNG tank box and box-type power unit, which utilizes the combustion of LNG to generate electricity, and supplies power to the propulsion system of dual motors and dual propellers through a DC bus distribution board and a battery pack. The modular air supply module and main generator module are arranged on the stern main deck and can be directly replaced as a whole, effectively improving the replacement efficiency and improving the ship's endurance.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] An open container ship comprises a hull, wherein a plurality of cargo holds with open upper ends are arranged in the middle of the hull along the length direction thereof, a bow main deck, a bow platform and a bow bilge are arranged in sequence from top to bottom at the bow end of the hull, and a stern main deck, a stern platform and a stern bilge are arranged in sequence from top to bottom at the stern end of the hull, and the bow main deck and the stern main deck are located at the same horizontal layer, the bow platform and the stern platform are located at the same horizontal layer, and the bow bilge and the stern bilge are located at the same horizontal layer;

[0006] The bow main deck is provided with a compass deck, a driving deck, a captain's deck, a forecastle deck and an upper living area from top to bottom; the stern main deck is provided with a support layer, an air supply module is detachably fixedly installed on the support layer, a main generator module detachably fixedly installed on the stern main deck is provided below the support layer, a frequency converter room, a cabin control room, a steering gear room and a power battery room are provided on the stern platform, and a propulsion cabin is provided at the bottom of the stern cabin;

[0007] A DC bus distribution board is provided between the frequency converters, a battery pack is provided between the power battery, and two propulsion motors for driving twin propellers are provided in the propulsion cabin; the air supply module is connected to the main generator module through pipelines and joints to supply LNG fuel to the main generator module, the main generator module is connected to the battery pack through the DC bus distribution board, and the battery pack is connected to the propulsion motor; the main generator module burns LNG fuel to generate electricity, drives the propulsion motor through the DC bus distribution board and the battery pack, and the propulsion motor drives the twin propellers to drive the ship to sail.

[0008] By adopting the above technical solution, the air supply module supplies LNG fuel to the main generator module, the main generator module burns LNG fuel and converts it into electrical energy, and stores the electrical energy in the battery pack through the DC bus distribution board. The battery pack supplies power to the propulsion motor, and the two propulsion motors drive the twin propellers to drive the ship to sail. LNG fuel is a clean energy, and the air supply module and the main generator module are modularly designed and directly installed on the stern main deck. When LNG fuel is insufficient, the air supply module can be replaced as a whole at the dock. Compared with filling, the replenishment efficiency of LNG fuel is greatly improved, and the requirements for supporting facilities such as the dock LNG filling station are reduced; when the main generator module fails, it can also be directly replaced as a whole at the dock. Compared with the shore maintenance, it greatly saves maintenance time, ensures the continuous navigation of the ship, and improves the ship's endurance. After modularly designing the air supply module and the main generator module, the other structures of the ship are adaptively designed to ensure the normal operation of the ship. Among them, the air supply module and the main generator module are arranged up and down through the support layer to ensure that there is enough space to install the air supply module and the main generator module, thereby ensuring the working capacity of the air supply module and the main generator module and improving the endurance of the ship.

[0009] Furthermore, the gas supply module includes a plurality of LNG tank boxes, which are arranged in an array along the width direction of the hull and have at least two layers up and down, and each of the LNG tank boxes is arranged along the length direction of the hull; the plurality of LNG tank boxes in the lower layer can be detachably fixedly installed on the supporting layer, and the plurality of LNG tank boxes in the upper layer can be detachably fixedly installed on the LNG tank boxes below them.

[0010] By adopting the above technical solution, the gas supply module includes at least two layers of rectangular arrays of LNG tanks, ensuring that the number of LNG tanks is sufficient, thereby ensuring the endurance of the ship, and there is no need to frequently dock to replace the gas supply module. The LNG tanks store LNG fuel in a container mode. In the use environment where the LNG tanks are directly installed on the supporting layer, water ingress, rust, etc. are avoided in the LNG tanks, ensuring the safety of the use of the LNG tanks.

[0011] Further, the rectangular array at the bottom of the LNG tank box is provided with a plurality of mounting protrusions, the rectangular array on the support layer is provided with a plurality of mounting openings which vertically penetrate the protrusions and cooperate with the corresponding mounting protrusions, and the rectangular array on the top of the LNG tank box is provided with a plurality of mounting grooves which cooperate with the mounting protrusions; each of the mounting protrusions is provided with a mounting hole which penetrates the protrusion, and the axes of the plurality of mounting holes are parallel to each other and are arranged along the length direction or the width direction of the LNG tank box;

[0012] A plurality of fixing plates are arranged in an array along the axis direction of the mounting hole at the bottom of the support layer. The fixing plates are arranged horizontally perpendicular to the axis direction of the mounting hole. A plurality of mounting protrusions along the length direction of the fixing plates form a group. A plurality of the fixing plates and a plurality of groups of mounting protrusions are arranged at intervals. A plurality of mounting rods matching the mounting holes on the corresponding mounting protrusions are arranged in an array along the length direction of the fixing plates close to the mounting protrusions. The fixing plates are slidably installed at the bottom of the support layer along the axis direction of the mounting hole, and a telescopic cylinder driving the fixing plates to slide is connected to a side of the fixing plates away from the mounting rods.

[0013] The rectangular array on the top of the LNG tank box is provided with a plurality of through holes coaxially arranged with the mounting holes, and a fixing rod arranged along the axial direction is passed between the coaxial mounting holes and the through holes, and the two ends of the fixing rod extend out of the through holes at both ends and are fixed to the side wall of the LNG tank box through fixing flanges.

[0014] By adopting the above technical solution, when the lower LNG tank box is installed on the supporting layer, the installation protrusion on the lower LNG tank box passes through the installation clearance opening, and the bottom of the lower LNG tank box directly contacts the supporting layer. The telescopic cylinder drives the corresponding fixed plate to slide, and a number of installation rods are inserted into the installation holes on the corresponding installation protrusions. Under the limiting cooperation of the several installation rods and the installation holes and the limiting cooperation of the installation clearance opening and the installation protrusions, the lower LNG tank box is fixedly installed on the supporting layer. When the upper LNG tank box is installed on the lower LNG tank box, the installation protrusion on the upper LNG tank box is clamped in the installation groove on the top of the lower LNG tank box, and the fixing rod is set through a number of coaxial installations in the installation holes and through holes, and the two ends of the fixing rod are fixed to the side wall of the LNG tank box by using the fixing flange, so that the upper LNG tank box is fixedly installed on the lower LNG tank box.

[0015] When the gas supply module needs to be replaced, the telescopic cylinder is driven to slide and the mounting rod is pulled out from the corresponding mounting hole, thereby releasing the fixing effect on the lower LNG tank box. The multi-layer LNG tank boxes can be hoisted and removed at the same time. Before replacement, the multi-layer LNG tank boxes are assembled and fixed at the dock and directly replaced on the hull. Only the lower tank box needs to be fixed again, and there is no need to disassemble and replace the LNG tank box individually, which further improves the replacement efficiency of the gas supply module. The above-mentioned LNG tank box installation method has a simple structure. While ensuring the installation and fixing effect of the LNG tank box, there is no need to use fragmented screws for fixing, which is convenient for quick fixing and disassembly.

[0016] Furthermore, the main generator module includes at least three box-type power units arranged along the length direction of the hull, and multiple box-type power units are arranged in an array along the width direction of the hull, and each of the box-type power units can be detachably fixed and installed on the stern main deck; each of the box-type power units is equipped with at least three gas generators along its length direction, and several of the LNG tank containers are evenly connected to multiple box-type power units through pipelines, and are also connected to several gas generators in the corresponding box-type power units.

[0017] By adopting the above technical solution, the main generator module is composed of multiple box-type power units, and each box-type power unit includes multiple gas generators. While ensuring the power generation capacity, the box-type power units can be replaced individually without replacing the entire main generator module, thereby ensuring the working effect while reducing costs.

[0018] Further, the box-type power unit comprises a box body and a base arranged at the bottom of the box body and formed integrally with the box body, a plurality of the gas generators are installed in the box body, and the base is detachably fixedly installed on the stern main deck; the stern main deck is fixed with longitudinal fixing bars located at both ends of the box body and arranged along the width direction of the box body, and the bottom ends of the base are provided with longitudinal fixing grooves matched with the longitudinal fixing bars; the two side walls of the base along the length direction thereof are provided with transverse fixing grooves arranged along the length direction thereof, and a transverse fixing bar matched with the transverse fixing groove is installed between the two longitudinal fixing bars;

[0019] The upper end surface of the longitudinal fixing bar is provided with a locking groove arranged along its length direction, and the transverse fixing bars at both ends of the longitudinal fixing bar are provided with locking blocks integrally formed with them and slidably installed in the locking groove on the side away from each other; a locking screw arranged along its length direction is positioned and rotatably installed in the locking groove, the two locking blocks are threadedly connected to the locking screw and the thread rotation directions are opposite, and one end of the locking screw is connected to a locking motor that drives it to rotate.

[0020] By adopting the above technical solution, when multiple groups of box-type power units are fixed on the stern main deck, the longitudinal fixing strips are clamped in the corresponding longitudinal fixing grooves to realize the horizontal limit fixation of the box-type power units perpendicular to the length direction of the longitudinal fixing strips, and the transverse fixing strips are clamped in the corresponding transverse fixing grooves to realize the vertical limit fixation of the box-type power units, and the transverse fixing strips are fixed on the longitudinal fixing strips, and the transverse fixing strips on both sides of the box-type power units cooperate to realize the limit fixation of the box-type power units along the length direction of the longitudinal fixing strips, thereby realizing the fixed installation of the box-type power units. Among them, the cooperation of the locking motor, the locking screw and the locking block is utilized to realize driving the two locking blocks to drive the two transverse fixing strips to slide synchronously toward or away from each other, so as to realize driving the transverse fixing strips to automatically clamp into or move out of the corresponding transverse fixing grooves, and quickly realize the fixation or release of the box-type power units. This screw-driven method adjusts and fixes the position of the cross-fixing bar without the need for additional screw fixing operations, greatly improving the operating speed. It can also fix box-type power units of different widths, effectively increasing the scope of application.

[0021] Furthermore, the distance between the support layer and the stern main deck is higher than twice the height of the box-type power unit, and the stern main deck is provided with an entry and exit structure cooperating with the box-type power unit; the entry and exit structure includes a plurality of jacks arranged below the corresponding box-type power units, and the stern main deck is provided with a receiving cavity cooperating with the jack, and when the box-type power unit is installed on the stern main deck, the jack is completely located in the receiving cavity; the entry and exit structure also includes a discharge rack arranged at both ends of the box-type power unit, and the discharge rack is arranged along the width direction of the hull and is slidably installed on the stern main deck along the length direction of the box-type power unit; the height of the discharge rack is higher than the height of the box-type power unit, and the discharge rack is provided with a discharge chain belt arranged in a closed loop along its length direction, and a baffle arranged along its length direction and vertically upward is provided on the side where the two discharge racks are away from each other, and lifting rings are provided at the four corners of the top of the box body.

[0022] By adopting the above technical solution, when a box-type power unit needs to be replaced, the corresponding jack is used to lift the box-type power unit upward until it is higher than the discharge rack, and the two discharge racks are driven to move closer to each other to the bottom of the box-type power unit. The jack drives the box-type power unit to move vertically downward until the box-type power unit is placed on the discharge rack. The discharge chain works in a cycle, driving the box-type power unit to move from above the other box-type power units to below the supporting layer, and then it can be hoisted and removed by connecting it to the lifting ring using an external crane. The new box-type power unit is hoisted onto the discharge rack, and after the discharge chain drives the new box-type power unit to reset to the jack, the two discharge racks move away from each other, and the new box-type power unit can be fixedly installed on the stern main deck using the jack. The above-mentioned entry and exit structure facilitates the replacement of the box-type power unit, avoids the box-type power unit being set below the supporting layer and is inconvenient to lift and move, and the baffles on both sides ensure the stability of the box-type power unit during the movement. The jack is normally stored in the accommodating cavity, avoiding the box-type power unit always relying on the jack for support, thereby ensuring the service life of the jack.

[0023] Furthermore, each of the box-type power units is provided with a first fixed joint at one end, the first fixed joint is connected to an air intake pipe, and the air intake pipe is provided with a second fixed joint which is detachably fixedly connected to the first fixed joint; the air intake pipe is provided with a plurality of air intake branch pipes connected thereto at one end away from the second fixed joint, and each of the air intake branch pipes is provided with a third fixed joint at one end away from the air intake pipe, and one end of the LNG tank box is provided with a fourth fixed joint which is detachably fixedly connected to the third fixed joint; the first fixed joint, the second fixed joint, the third fixed joint and the fourth fixed joint are all connected with an automatic switching valve and a manual switching valve.

[0024] By adopting the above technical solution, the first fixed joint and the second fixed joint are used to realize the detachable connection between the box-type power unit and the air intake pipe, and the third fixed joint and the fourth fixed joint are used to realize the detachable connection between the LNG tank box and the air intake branch pipe, that is, multiple LNG tank boxes are connected to the box-type power unit through the air intake pipe to supply LNG fuel to it. When it is necessary to replace the box-type power unit or the LNG tank box, just close the corresponding fixed joint through the automatic switch valve or the manual switch valve, and then disconnect the corresponding first fixed joint and the second fixed joint or the third fixed joint and the fourth fixed joint. Among them, the manual switch valve is used as a backup for the automatic switch valve to avoid LNG fuel leakage when the automatic switch valve fails, thereby ensuring safety.

[0025] Furthermore, the connection structure of the first fixed joint and the second fixed joint is the same as the connection structure of the third fixed joint and the fourth fixed joint, both of which are connected by a male joint and a female joint, and a sealing structure is provided between the first fixed joint and the second fixed joint and between the third fixed joint and the fourth fixed joint;

[0026] The sealing structure includes a sealing ring slidably mounted on the second fixed joint and the third fixed joint, the inner ring of the sealing ring is provided with a sealing groove, and an annular airbag is arranged in the sealing groove; the outer wall of the sealing ring is provided with a receiving groove, and the annular airbag is provided with an air release valve located in the receiving groove, the annular airbag is also connected to an extruded inflatable balloon ball located in the receiving groove, and a protective cover is clamped at the opening of the receiving groove.

[0027] By adopting the above technical solution, when the first fixed joint is connected to the second joint, and the third fixed joint is connected to the fourth fixed joint, the sealing ring is located at the connection between the two, and the sealing of the connection between the two fixed joints is ensured under the extrusion of the annular airbag. When it is necessary to disconnect, open the protective cover, deflate the annular airbag through the deflation valve, and then move the sealing ring to the corresponding second fixed joint or the third fixed joint, without replacing the sealing structure together with the LNG tank or box-type power unit. After reconnecting the two fixed joints, move the sealing ring to the connection between the two, and inflate the annular airbag by squeezing the airbag ball to expand it to seal the connection between the two fixed joints. Among them, the sealing groove can be protected by the annular airbag, and the protective cover and the containing groove cooperate to protect the deflation valve and the extrusion inflation bag, so as to prevent the annular airbag, the deflation valve and the extrusion inflation bag from being eroded by the harsh environment and affecting their use effect and service life. Compared with electric inflation, it can also simplify the inflation structure and cost of the annular airbag.

[0028] Furthermore, a lower living area is provided on the bow platform, and two chain lockers are provided on the side of the upper living area and the lower living area away from the cargo hold, and the two chain lockers are connected to the bow main deck and the bow platform up and down; an emergency fire compartment is provided at the bottom of the bow hold, and a fresh water tank and a bow ballast water tank are provided on both sides of the emergency fire compartment, and the fresh water tank is located between the cargo hold and the bow ballast water tank, and a bow peak tank serving as a ballast tank is also provided on the end of the emergency fire compartment away from the cargo hold.

[0029] By adopting the above technical scheme, the lower living area and the upper living area are arranged up and down, which is conducive to the layout and unified management of living facilities. The chain lockers are connected up and down to facilitate sufficient space for storing anchor chains. The emergency fire fighting cabin is arranged at the bottom of the bow cabin close to the lower living area to facilitate timely emergency fire fighting operations. The fresh water tank is arranged below the lower living area for easy use. The design of the bow ballast water tank and the forepeak tank and ballast tank can ensure the stability of the bow position.

[0030] Furthermore, an emergency generator room is provided on the forecastle deck, and an emergency generator is provided in the emergency generator room. The emergency generator is connected to a battery pack for use in emergency conditions.

[0031] By adopting the above technical solution, an emergency generator room and an emergency generator are set up on the forecastle deck, close to the upper living area, so that the emergency generator can be started in time to generate electricity when the main generator module fails, thereby ensuring the normal operation of the ship.

[0032] In summary, the present invention has the following beneficial effects:

[0033] 1. The air supply module and the main generator module are modularly designed in the present invention and can be directly detachably installed on the stern main deck. The air supply module supplies LNG fuel to the main generator module, and the main generator module burns LNG fuel to convert it into electrical energy to realize power supply for the dual propulsion motors and daily electricity consumption of the hull. LNG fuel is a clean energy, and when the LNG fuel is insufficient, the air supply module can be directly replaced as a whole at the dock. When the main generator module fails, it can also be directly replaced as a whole at the dock. Compared with filling and docking for maintenance, the replenishment efficiency of LNG fuel is greatly improved, the requirements for supporting facilities such as the dock LNG filling station are reduced, and the maintenance time is greatly saved, which ensures the continuous navigation of the ship and improves the endurance of the ship.

[0034] 2. In the present invention, the air supply module and the main generator module are arranged up and down by the support layer, so that there is enough space to install the air supply module and the main generator module, thereby ensuring the working capacity of the air supply module and the main generator module and improving the endurance of the ship;

[0035] 3. In the present invention, the installation structure of several LNG tank boxes in the gas supply module is specially designed to realize the rapid installation, fixing and disassembly of the lower LNG tank box on the supporting layer, and realize the detachable installation connection between the upper and lower LNG tank boxes. When replacing the gas supply module, it is only necessary to connect or unlock the lower LNG tank box and the supporting layer to realize the synchronous replacement of multiple layers of LNG tank boxes. The installation, connection or disassembly between the upper and lower LNG tank boxes can be carried out at the dock, further improving the replacement efficiency of the gas supply module;

[0036] 4. In the present invention, the installation structure between the box-type power unit in the main generator module and the stern main deck is specially designed, and an access structure is provided to facilitate the rapid installation and replacement of the box-type power unit, while avoiding the influence of the supporting layer on the rapid replacement of the box-type power unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of an open container ship;

[0038] Figure 2 It is an end side view of an open container ship;

[0039] Figure 3 It is a top view of the level where the bow main deck and the stern main deck are located in an open container ship;

[0040] Figure 4 It is a top view of the level where the bow platform and the stern platform are located in an open container ship;

[0041] Figure 5 It is a top view of the level where the bow bilge and the stern bilge are located in an open container ship;

[0042] Figure 6 It is a structural schematic diagram of the forecastle deck in an open container ship;

[0043] Figure 7 It is a schematic diagram of the structure of the air supply module and the main generator module in an open container ship;

[0044] Figure 8 It is a schematic diagram of a part of the structure of an air supply module in an open container ship;

[0045] Fig. 9 The present invention is a partial structural schematic diagram of a main generator module in an open container ship.

[0046] In the figure, 1, hull; 11, cargo hold; 111, empty hold; 112, bottom ballast tank; 113, side ballast tank; 12, main deck at the bow; 121, compass deck; 122, navigation deck; 123, captain's deck; 124, forecastle deck; 1241, emergency generator room; 1242, emergency generator; 125, upper living area; 13, bow platform; 131, lower living area; 132, chain locker; 14, bow bottom; 141, emergency fire fighting cabin; 142, fresh water tank; 143, bow Ballast water tank; 144, bow tank and ballast tank; 15, stern main deck; 151, storage cavity; 16, stern platform; 161, inverter room; 1611, DC bus distribution board; 162, engine room control room; 163, steering gear room; 164, power battery room; 1641, battery pack; 17, stern bilge; 171, propulsion cabin; 172, propulsion motor; 18, stern ballast tank; 2, support layer; 21, installation of clearance port; 22, fixing plate; 23, installation rod; 24, telescopic cylinder; 3, Gas supply module; 31, LNG tank box; 311, fourth fixing joint; 312, lifting ear; 32, mounting protrusion; 33, mounting groove; 34, mounting hole; 35, through hole; 36, fixing rod; 37, fixing flange; 4, main generator module; 41, box-type power unit; 411, first fixing joint; 42, gas generator; 43, box body; 431, lifting ring; 44, base; 441, longitudinal fixing groove; 442, transverse fixing groove; 45, longitudinal fixing strip; 451, locking groove; 46, transverse fixing strip; 4 61. Locking block; 47. Locking screw; 471. Locking motor; 5. Inlet and outlet structure; 51. Jack; 52. Discharge rack; 53. Discharge chain; 54. Baffle; 6. Air intake pipe; 61. Second fixed joint; 62. Air intake branch pipe; 63. Third fixed joint; 64. Automatic switch valve; 65. Manual switch valve; 7. Sealing structure; 71. Sealing ring; 72. Sealing groove; 73. Annular airbag; 731. Deflation valve; 732. Extruded inflatable bag ball; 74. Receiving groove; 75. Protective cover. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] An open container ship, such as Figure 1 and Figure 2As shown, it comprises a hull 1, and a plurality of cargo holds 11 with open upper ends are arranged in the middle of the hull 1 along its length direction. When transporting container cargo, the containers are arranged in a rectangular array and several layers are arranged up and down and stacked in the cargo hold 11, and the bottom layer of containers and the adjacent layer of containers are detachably fixedly connected. Two bottom ballast tanks 112 are symmetrically arranged at the bottom of each cargo hold 11, and side ballast tanks 113 and empty tanks 111 located above the side ballast tanks 113 are arranged on both sides of the cargo hold 11.

[0049] like Figure 1 As shown, the bow main deck 12, the bow platform 13 and the bow bilge 14 are arranged in sequence from top to bottom at the bow end of the hull 1, and the stern main deck 15, the stern platform 16 and the stern bilge 17 are arranged in sequence from top to bottom at the stern end of the hull 1. Figure 3 As shown, the bow main deck 12 and the stern main deck 15 are located at the same horizontal layer. Figure 4 As shown, the bow platform 13 and the stern platform 16 are located at the same level of the empty compartment 111 on both sides of the cargo compartment 11. Figure 5 As shown, the bow bilge 14 and the stern bilge 17 are located at the same level of the side ballast tank 113 .

[0050] Specifically, Figure 1 and Figure 3 As shown, the bow main deck 12 is provided with a compass deck 121, a navigation deck 122, a captain's deck 123, a forecastle deck 124 and an upper living area 125 in order from top to bottom. Figure 4 As shown, a lower living area 131 is provided on the bow platform 13, and the upper living area 125 and the lower living area 131 are mainly used to arrange basic living facilities such as bedrooms, offices, kitchens, dining rooms, laundry rooms, and entertainment rooms. Figure 1 , Figure 3 and Figure 4 As shown, two anchor chain lockers 132 are arranged side by side along the width direction of the hull 1 on the side of the upper living area 125 and the lower living area 131 away from the cargo hold 11, and the two anchor chain lockers 132 are connected to the bow main deck 12 and the bow platform 13 from top to bottom. Figure 1 and Figure 5 As shown, an emergency fire compartment 141 is provided at the bow bilge 14, and symmetrically arranged fresh water tanks 142 and bow ballast water tanks 143 are provided on both sides of the emergency fire compartment 141, and the fresh water tank 142 is located between the cargo hold 11 and the bow ballast water tank 143. A bow peak tank and ballast tank 144 is also provided at the end of the emergency fire compartment 141 away from the cargo hold 11, and an empty compartment 111 is provided below the emergency fire compartment 141.

[0051] like Figure 1 and Figure 3As shown, a support layer 2 is provided on the stern main deck 15, an air supply module 3 is detachably fixedly installed on the support layer 2, and a main generator module 4 is detachably fixedly installed on the stern main deck 15 below the support layer 2. Figure 4 and Figure 5 As shown, a frequency converter room 161, a cabin control room 162, a steering gear room 163 and a power battery room 164 are provided on the stern platform 16, and a propulsion cabin 171 is provided on the stern bilge 17. A DC busbar distribution board 1611 is provided in the frequency converter room 161, a battery pack 1641 is provided in the power battery room 164, and two propulsion motors 172 for driving the twin propellers are provided in the propulsion cabin 171.

[0052] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the air supply module 3 is connected to the main generator module 4 through pipes and joints to supply LNG fuel to the main generator module 4. The main generator module 4 is connected to the battery pack 1641 through the DC bus distribution board 1611, and the battery pack 1641 is connected to the propulsion motor 172. The main generator module 4 burns LNG fuel to generate electricity, drives the propulsion motor 172 to work through the DC bus distribution board 1611 and the battery pack 1641, and the propulsion motor 172 drives the twin propellers to drive the ship to sail. Of course, the battery pack 1641 also supplies power for the daily electricity of the entire ship. In addition, Figure 6 As shown, an emergency generator room 1241 is provided on the forecastle deck 124, and an emergency generator 1242 is provided in the emergency generator room 1241. The emergency generator 1242 is connected to the battery pack 1641 and is used as an emergency working condition to ensure that the propulsion motor 172 can work normally to drive the ship to navigate and maintain emergency electricity for the entire ship.

[0053] To ensure the balance of the whole ship, Figure 4 and Figure 5 As shown, the stern platform 16 is provided with stern ballast tanks 18 located on both sides of the steering gear cabin 163, and the stern bilge 17 is also provided with stern ballast tanks 18 located on the side of the propulsion cabin 171 away from the cargo cabin 11 and symmetrically arranged. Figure 1 As shown, the two stern ballast tanks 18 on the stern platform 16 and the two stern ballast tanks 18 on the stern bilge 17 are connected to each other.

[0054] In this embodiment, if Figure 7As shown, the gas supply module 3 includes a plurality of LNG tank boxes 31, which are arranged in an array along the width direction of the hull 1 and have at least two layers above and below, and each LNG tank box 31 is arranged along the length direction of the hull 1; the plurality of LNG tank boxes 31 in the lower layer can be detachably fixedly installed on the support layer 2, and the plurality of LNG tank boxes 31 in the upper layer can be detachably fixedly installed on the LNG tank boxes 31 below it. The main generator module 4 includes at least three box-type power units 41 arranged along the length direction of the hull 1, and the plurality of box-type power units 41 are arranged in an array along the width direction of the hull 1, and each box-type power unit 41 can be detachably fixedly installed on the stern main deck 15. Figure 1 and Figure 7 As shown, each box-type power unit 41 is provided with at least three gas generators 42 along its length direction, and a plurality of LNG tank boxes 31 are evenly connected to a plurality of box-type power units 41 through pipelines, and are also connected to a plurality of gas generators 42 in the corresponding box-type power units 41 .

[0055] like Figure 1 As shown, the LNG fuel used in the present invention is a clean energy source. The air supply module 3 and the main generator module 4 are modularly designed and directly installed on the stern main deck 15. When the LNG fuel is insufficient, the air supply module 3 can be replaced as a whole directly at the dock. Compared with filling, the replenishment efficiency of LNG fuel is greatly improved, and the requirements for supporting facilities such as the dock LNG filling station are reduced. When the main generator module 4 fails, it can also be directly replaced as a whole at the dock. Compared with the shore maintenance, it greatly saves maintenance time, ensures the continuous navigation of the ship, and improves the endurance of the ship. Among them, the air supply module 3 and the main generator module 4 are arranged up and down by the support layer 2, ensuring that there is enough space to install the air supply module 3 and the main generator module 4, thereby ensuring the working capacity of the air supply module 3 and the main generator module 4 and improving the endurance of the ship.

[0056] like Figure 8 As shown, in order to realize the detachable fixed installation of several LNG tank boxes 31 in the gas supply module 3, several installation protrusions 32 are arranged in a rectangular array at the bottom of the LNG tank box 31, several installation openings 21 are arranged in a rectangular array on the support layer 2, which vertically penetrate the LNG tank box 31 and cooperate with the corresponding installation protrusions 32, and several installation grooves 33 are arranged in a rectangular array on the top of the LNG tank box 31 to cooperate with the installation protrusions 32. A mounting hole 34 is arranged on each mounting protrusion 32 to penetrate the LNG tank box 31, and the axes of the several mounting holes 34 are parallel to each other and are arranged along the length direction or width direction of the LNG tank box 31. In this embodiment, the axes of the mounting holes 34 are arranged along the length direction of the LNG tank box 31, and the four corners near the top of the two ends of the LNG tank box 31 are provided with lifting ears 312 for easy connection and lifting.

[0057] like Figure 8As shown, a plurality of fixing plates 22 are arranged in an array along the axis direction of the mounting hole 34 at the bottom of the support layer 2, and the fixing plates 22 are arranged horizontally perpendicular to the axis direction of the mounting hole 34. A plurality of mounting protrusions 32 along the length direction of the fixing plates 22 form a group, and a plurality of fixing plates 22 and a plurality of groups of mounting protrusions 32 are arranged at intervals. A plurality of mounting rods 23 matching the mounting holes 34 on the corresponding mounting protrusions 32 are arranged in an array along the length direction of the fixing plates 22 close to the mounting protrusions 32. The fixing plates 22 are slidably installed at the bottom of the support layer 2 along the axis direction of the mounting hole 34, and a telescopic cylinder 24 driving the fixing plates 22 to slide is connected to the side away from the mounting rods 23.

[0058] like Figure 8 As shown, when the lower LNG tank box 31 is installed on the supporting layer 2, the installation protrusion 32 on the lower LNG tank box 31 passes through the installation clearance opening 21, and the bottom of the lower LNG tank box 31 directly contacts the supporting layer 2. The telescopic cylinder 24 drives the corresponding fixing plate 22 to slide, and inserts a plurality of installation rods 23 into the installation holes 34 on the corresponding installation protrusions 32. Under the limiting cooperation of the plurality of installation rods 23 and the installation holes 34 and the limiting cooperation of the installation clearance opening 21 and the installation protrusions 32, the lower LNG tank box 31 is fixedly installed on the supporting layer 2. When the gas supply module 3 needs to be replaced, the telescopic cylinder 24 is driven to slide and the installation rod 23 is pulled out from the corresponding installation hole 34, and the fixing effect on the lower LNG tank box 31 is released, and the multiple layers of LNG tank boxes 31 can be hoisted and removed at the same time.

[0059] In addition, if Figure 8 As shown, a plurality of through holes 35 coaxially arranged with the mounting holes 34 are arranged in a rectangular array on the top of the LNG tank box 31, and a fixing rod 36 arranged along the axial direction is passed between the coaxial mounting holes 34 and the through holes 35, and both ends of the fixing rod 36 extend out of the through holes 35 at both ends and are fixed to the side wall of the LNG tank box 31 through fixing flanges 37. When the upper LNG tank box 31 is installed on the lower LNG tank box 31, the mounting protrusion 32 on the upper LNG tank box 31 is clamped in the mounting groove 33 on the top of the lower LNG tank box 31, and the fixing rod 36 is passed through the plurality of coaxial mounting holes 34 and the through holes 35, and the two ends of the fixing rod 36 are fixed to the side wall of the LNG tank box 31 by using the fixing flanges 37, so as to realize the limited fixed installation of the upper LNG tank box 31 on the lower LNG tank box 31. Before replacing the front gas supply module 3, the multi-layer LNG tank box 31 is first assembled and fixed at the dock, and the multi-layer LNG is directly hoisted and replaced on the hull 1. Only the lower tank box needs to be fixed again, and there is no need to disassemble and replace the LNG tank box 31 individually, which further improves the replacement efficiency of the gas supply module 3.

[0060] like Figure 7 and Fig. 9As shown, in order to realize the detachable fixed installation of several box-type power units 41 in the main generator module 4, in this embodiment, the box-type power unit 41 includes a box body 43 and a base 44 arranged at the bottom of the box body 43 and integrally formed with the box body 43, and several gas generators 42 are installed in the box body 43, and the base 44 is detachably fixedly installed on the stern main deck 15. Specifically, longitudinal fixing bars 45 located at both ends of the box body 43 and arranged along the width direction of the box body 43 are fixed on the stern main deck 15, and longitudinal fixing grooves 441 cooperating with the longitudinal fixing bars 45 are arranged at both ends of the bottom of the base 44. Transverse fixing grooves 442 arranged along the length direction of the base 44 are arranged on the two side walls along the length direction thereof, and a transverse fixing bar 46 cooperating with the transverse fixing groove 442 is installed between the two longitudinal fixing bars 45.

[0061] like Figure 7 and Fig. 9 As shown, when multiple groups of box-type power units 41 are fixed on the stern main deck 15, the longitudinal fixing bars 45 are clamped in the corresponding longitudinal fixing grooves 441 to achieve the limit fixation of the box-type power units 41 horizontally and perpendicular to the length direction of the longitudinal fixing bars 45, and the transverse fixing bars 46 are clamped in the corresponding transverse fixing grooves 442 to achieve the limit fixation of the box-type power units 41 in the vertical direction, and the transverse fixing bars 46 are fixed on the longitudinal fixing bars 45. The transverse fixing bars 46 on both sides of the box-type power units 41 cooperate to achieve the limit fixation of the box-type power units 41 along the length direction of the longitudinal fixing bars 45, thereby achieving the fixed installation of the box-type power units 41.

[0062] To further improve the operation speed, in this embodiment, Figure 7 and Fig. 9 As shown, a locking groove 451 is provided on the upper end surface of the longitudinal fixing bar 45 along its length direction, and locking blocks 461 are provided on the sides of the transverse fixing bars 46 at both ends of the longitudinal fixing bar 45 that are away from each other and are integrally formed with the longitudinal fixing bar 45 and slidably installed in the locking groove 451. A locking screw 47 is positioned and rotatably installed in the locking groove 451 along its length direction, and two locking blocks 461 are threadedly connected to the locking screw 47 and the thread rotation directions are opposite. One end of the locking screw 47 is connected to a locking motor 471 that drives the locking screw 47 to rotate. In this way, by using the cooperation of the locking motor 471, the locking screw 47 and the locking block 461, the two locking blocks 461 are driven to drive the two transverse fixing bars 46 to slide synchronously toward or away from each other, so as to drive the transverse fixing bars 46 to automatically snap into or move out of the corresponding transverse fixing groove 442, and quickly fix or release the box-type power unit 41.

[0063] like Figure 7 and Fig. 9As shown, since several box-type power units 41 are arranged below the supporting layer 2, in order to prevent the supporting layer 2 from affecting the lifting and replacement of the box-type power units 41, in this embodiment, the distance between the supporting layer 2 and the stern main deck 15 is higher than twice the height of the box-type power units 41, and an entry and exit structure 5 cooperating with the box-type power units 41 is provided on the stern main deck 15, and lifting rings 431 are also provided at the four corners of the top of the box body 43.

[0064] Specifically, Figure 7 and Fig. 9 As shown, the entry and exit structure 5 includes a plurality of jacks 51 arranged below the corresponding box-type power unit 41, and a receiving cavity 151 cooperating with the jacks 51 is provided on the stern main deck 15. When the box-type power unit 41 is installed on the stern main deck 15, the jacks 51 are completely located in the receiving cavity 151. The entry and exit structure 5 also includes a discharge rack 52 arranged at both ends of the box-type power unit 41. The discharge rack 52 is arranged along the width direction of the hull 1 and is slidably installed on the stern main deck 15 along the length direction of the box-type power unit 41, and is connected to a sliding cylinder for driving it to slide. Among them, the height of the discharge rack 52 is higher than the height of the box-type power unit 41, and the discharge rack 52 is provided with a discharge chain belt 53 arranged in a closed loop along its length direction, and a baffle 54 arranged along its length direction and vertically upward is provided on the side away from each other of the two discharge racks 52. Among them, the structure and working principle of the jack 51 are the same as those in the prior art, and no further elaboration is made, and only a simple schematic diagram is given in the figure.

[0065] like Figure 7 and Fig. 9 As shown, when a box-type power unit 41 needs to be replaced, the corresponding jack 51 is used to lift the box-type power unit 41 upward until it is higher than the discharge rack 52, and the two discharge racks 52 are driven to move closer to each other to the bottom of the box-type power unit 41. The jack 51 drives the box-type power unit 41 to move vertically downward until the box-type power unit 41 is placed on the discharge rack 52. The discharge chain 53 works in a cycle, driving the box-type power unit 41 to move from above the other box-type power units 41 to below the support layer 2. The baffles 54 on both sides ensure the stability of the box-type power unit 41, and then the external crane is connected to the lifting ring 431 to lift and remove it. The new box-type power unit 41 is hoisted onto the discharge rack 52. After the discharge chain 53 drives the new box-type power unit 41 to reset to the jack 51, the two discharge racks 52 move away from each other, and the jack 51 is used to prevent the new box-type power unit 41 from being fixed on the stern main deck 15.

[0066] like Figure 8 and Fig. 9As shown, in order to realize the connection and gas supply between the air supply module 3 and the main generator module 4, a first fixed joint 411 is provided at one end of each box-type power unit 41, and the first fixed joint 411 is connected to the air intake pipe 6, and the air intake pipe 6 is provided with a second fixed joint 61 that is detachably fixedly connected to the first fixed joint 411. A plurality of air intake branches 62 that are connected thereto are provided at one end of the air intake pipe 6 away from the second fixed joint 61, and a third fixed joint 63 is provided at one end of each air intake branch pipe 62 away from the air intake pipe 6, and a fourth fixed joint 311 that is detachably fixedly connected to the third fixed joint 63 is provided at one end of the LNG tank box 31. The first fixed joint 411, the second fixed joint 61, the third fixed joint 63 and the fourth fixed joint 311 are all connected to an automatic switch valve 64 and a manual switch valve 65, so as to facilitate closing the corresponding fixed joints when replacing the air supply module 3 and the main generator module 4. Among them, the connection structure of the first fixed joint 411 and the second fixed joint 61 is the same as the connection structure of the third fixed joint 63 and the fourth fixed joint 311, both of which are connected by a male joint and a female joint, which is the same as in the prior art and is only briefly illustrated in the figure.

[0067] To ensure the tightness of the connection, Figure 8 and Fig. 9 As shown, a sealing structure 7 is provided between the first fixed joint 411 and the second fixed joint 61, and between the third fixed joint 63 and the fourth fixed joint 311. The sealing structure 7 comprises a sealing ring 71 slidably mounted on the second fixed joint 61 and the third fixed joint 63, a sealing groove 72 is provided in the inner ring of the sealing ring 71, and an annular airbag 73 is provided in the sealing groove 72; a receiving groove 74 is provided on the outer wall of the sealing ring 71, and a deflation valve 731 located in the receiving groove 74 is provided on the annular airbag 73, and the annular airbag 73 is also connected to an extruded inflatable balloon ball 732 located in the receiving groove 74, and a protective cover 75 is clamped at the opening of the receiving groove 74.

[0068] like Figure 8 and Fig. 9 As shown, when the first fixed joint 411 is connected to the second joint, and the third fixed joint 63 is connected to the fourth fixed joint 311, the sealing ring 71 is located at the connection between the two. Under the squeezing action of the annular airbag 73, the sealing of the connection between the two fixed joints is ensured. When it is necessary to disconnect, open the protective cover 75, deflate the annular airbag 73 through the deflation valve 731, and then move the sealing ring 71 to the corresponding second fixed joint 61 or third fixed joint 63. There is no need to replace the sealing structure 7 together with the LNG tank box 31 or the box-type power unit 41. After reconnecting the two fixed joints, move the sealing ring 71 to the connection between the two, squeeze the airbag ball to inflate the annular airbag 73, and expand it to seal the connection between the two fixed joints.

[0069] Working principle and use method of the present invention:

[0070] The air supply module 3 supplies LNG fuel to the main generator module 4. The main generator module 4 burns the LNG fuel and converts it into electrical energy. The electrical energy is stored in the battery pack 1641 through the DC bus distribution board 1611. The battery pack 1641 supplies power to the propulsion motor 172 and the daily electricity of the ship. The two propulsion motors 172 drive the twin propellers to drive the ship to sail. The modular air supply module 3 and the main generator module 4 are directly installed on the stern main deck 15. When the LNG fuel is insufficient, the air supply module 3 can be replaced as a whole directly at the dock. Compared with filling, the replenishment efficiency of LNG fuel is greatly improved, and the requirements for supporting facilities such as the dock LNG filling station are reduced. When the main generator module 4 fails, it can also be directly replaced at the dock. Compared with the shore maintenance, it greatly saves maintenance time, ensures the continuous navigation of the ship, and improves the endurance of the ship.

[0071] The above description shows and describes the preferred embodiments of the present invention. As mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. An open container ship, characterized in that: The invention comprises a hull (1), wherein a plurality of cargo holds (11) with open upper ends are arranged in the middle part of the hull (1) along the length direction thereof, wherein the bow end of the hull (1) is provided with a bow main deck (12), a bow platform (13) and a bow bilge (14) in sequence from top to bottom, and the stern end of the hull (1) is provided with a stern main deck (15), a stern platform (16) and a stern bilge (17) in sequence from top to bottom, and the bow main deck (12) and the stern main deck (15) are located at the same horizontal layer, the bow platform (13) and the stern platform (16) are located at the same horizontal layer, and the bow bilge (14) and the stern bilge (17) are located at the same horizontal layer; The bow main deck (12) is provided with a compass deck (121), a driving deck (122), a captain's deck (123), a forecastle deck (124) and an upper living area (125) in order from top to bottom; the stern main deck (15) is provided with a support layer (2), an air supply module (3) is detachably fixedly mounted on the support layer (2), a main generator module (4) detachably fixedly mounted on the stern main deck (15) is provided below the support layer (2), a frequency converter room (161), an engine room control room (162), a steering gear room (163) and a power battery room (164) are provided on the stern platform (16), and a propulsion cabin (171) is provided on the stern bilge (17); The frequency converter room (161) is provided with a DC bus distribution board (1611), the power battery room (164) is provided with a battery pack (1641), and the propulsion cabin (171) is provided with two propulsion motors (172) for driving the twin propellers to work; the air supply module (3) is connected to the main generator module (4) through a pipeline and a joint to supply LNG fuel to the main generator module (4), the main generator module (4) is connected to the battery pack (1641) through the DC bus distribution board (1611), and the battery pack (1641) is connected to the propulsion motor (172); the main generator module (4) burns LNG fuel to generate electricity, drives the propulsion motor (172) to work through the DC bus distribution board (1611) and the battery pack (1641), and the propulsion motor (172) drives the twin propellers to work and drives the ship to sail.

2. An open container ship according to claim 1, characterized in that: The gas supply module (3) comprises a plurality of LNG tank boxes (31), which are arranged in an array along the width direction of the hull (1) and are provided with at least two layers up and down, and each of the LNG tank boxes (31) is arranged along the length direction of the hull (1); the plurality of LNG tank boxes (31) at the lower layer are detachably fixedly mounted on the support layer (2), and the plurality of LNG tank boxes (31) at the upper layer are detachably fixedly mounted on the LNG tank boxes (31) below them.

3. An open container ship according to claim 2, characterized in that: The bottom rectangular array of the LNG tank box (31) is provided with a plurality of mounting protrusions (32); the upper rectangular array of the support layer (2) is provided with a plurality of mounting openings (21) vertically penetrating the support layer (31) and cooperating with the corresponding mounting protrusions (32); the top rectangular array of the LNG tank box (31) is provided with a plurality of mounting grooves (33) cooperating with the mounting protrusions (32); each of the mounting protrusions (32) is provided with a mounting hole (34) penetrating the mounting protrusion, and the axes of the plurality of mounting holes (34) are parallel to each other and are arranged along the length direction or the width direction of the LNG tank box (31); A plurality of fixing plates (22) are arranged in an array along the axial direction of the mounting hole (34) at the bottom of the supporting layer (2); the fixing plates (22) are arranged horizontally perpendicular to the axial direction of the mounting hole (34); a plurality of mounting protrusions (32) along the length direction of the fixing plates (22) form a group; a plurality of fixing plates (22) and a plurality of groups of mounting protrusions (32) are arranged at intervals; and a plurality of mounting rods (23) matching the mounting holes (34) on the corresponding mounting protrusions (32) are arranged in an array along the length direction of the fixing plates (22) on one side close to the mounting protrusions (32); the fixing plates (22) are slidably installed at the bottom of the supporting layer (2) along the axial direction of the mounting hole (34); and a telescopic cylinder (24) for driving the fixing plates to slide is connected to the side away from the mounting rods (23); A plurality of through holes (35) coaxially arranged with the mounting holes (34) are arranged in a rectangular array on the top of the LNG tank box (31); a fixing rod (36) arranged along the axial direction thereof is passed through between the plurality of coaxial mounting holes (34) and the through holes (35); two ends of the fixing rod (36) extend out of the through holes (35) at both ends thereof and are fixed to the side wall of the LNG tank box (31) through fixing flanges (37).

4. An open container ship according to claim 2, characterized in that: The main generator module (4) comprises at least three box-type power units (41) arranged along the length direction of the hull (1), and the plurality of box-type power units (41) are arranged in an array along the width direction of the hull (1), and each of the box-type power units (41) can be detachably fixedly installed on the stern main deck (15); each of the box-type power units (41) is provided with at least three gas generators (42) along its length direction, and the plurality of LNG tank boxes (31) are evenly connected to the plurality of box-type power units (41) through pipelines, and are also connected to the plurality of gas generators (42) in the corresponding box-type power units (41).

5. An open container ship according to claim 4, characterized in that: The box-type power unit (41) comprises a box body (43) and a base (44) arranged at the bottom of the box body (43) and formed integrally with the box body (43); a plurality of gas generators (42) are installed in the box body (43); the base (44) is detachably fixedly installed on the stern main deck (15); longitudinal fixing bars (45) located at both ends of the box body (43) and arranged along the width direction of the box body (43) are fixed on the stern main deck (15); longitudinal fixing grooves (441) cooperating with the longitudinal fixing bars (45) are arranged at both ends of the bottom of the base (44); transverse fixing grooves (442) arranged along the length direction of the base (44) are arranged on two side walls along the length direction of the base (44); a transverse fixing bar (46) cooperating with the transverse fixing groove (442) is installed between the two longitudinal fixing bars (45); The upper end surface of the longitudinal fixing bar (45) is provided with a locking groove (451) arranged along its length direction, and the transverse fixing bars (46) at both ends of the longitudinal fixing bar (45) are provided with locking blocks (461) formed integrally with the longitudinal fixing bar (45) and slidably installed in the locking groove (451) respectively on the side away from each other; a locking screw (47) arranged along its length direction is positioned and rotatably installed in the locking groove (451), the two locking blocks (461) are threadedly connected to the locking screw (47) and the thread rotation directions are opposite, and one end of the locking screw (47) is connected to a locking motor (471) for driving it to rotate.

6. An open container ship according to claim 5, characterized in that: The distance between the support layer (2) and the stern main deck (15) is higher than twice the height of the box-type power unit (41); the stern main deck (15) is provided with an access structure (5) that cooperates with the box-type power unit (41); the access structure (5) includes a plurality of jacks (51) arranged below the corresponding box-type power units (41); the stern main deck (15) is provided with a receiving cavity (151) that cooperates with the jacks (51); when the box-type power unit (41) is installed on the stern main deck (15), the jacks (51) are completely located in the receiving cavity (151); the access structure ( 5) also includes discharge racks (52) arranged at both ends of the box-type power unit (41), the discharge racks (52) are arranged along the width direction of the hull (1) and are slidably installed on the stern main deck (15) along the length direction of the box-type power unit (41); the height of the discharge rack (52) is higher than the height of the box-type power unit (41), the discharge rack (52) is provided with a discharge chain belt (53) arranged in a closed loop along the length direction thereof, and a baffle (54) arranged along the length direction thereof and vertically upward is provided on the side where the two discharge racks (52) are away from each other, and lifting rings (431) are provided at the four corners of the top of the box body (43).

7. An open container ship according to claim 4, characterized in that: A first fixed joint (411) is provided at one end of each box-type power unit (41), the first fixed joint (411) is connected to an air intake pipe (6), and a second fixed joint (61) is provided on the air intake pipe (6) and is detachably fixedly connected to the first fixed joint (411); a plurality of air intake branch pipes (62) are provided at one end of the air intake pipe (6) away from the second fixed joint (61) and are connected thereto, and a third fixed joint (63) is provided at one end of each air intake branch pipe (62) away from the air intake pipe (6), and a fourth fixed joint (311) is provided at one end of the LNG tank box (31) and is detachably fixedly connected to the third fixed joint (63); the first fixed joint (411), the second fixed joint (61), the third fixed joint (63) and the fourth fixed joint (311) are all connected to an automatic switch valve (64) and a manual switch valve (65).

8. An open container ship according to claim 7, characterized in that: The connection structure between the first fixed joint (411) and the second fixed joint (61) is the same as the connection structure between the third fixed joint (63) and the fourth fixed joint (311), and both are connected by a male joint and a female joint, and a sealing structure (7) is provided between the first fixed joint (411) and the second fixed joint (61), and between the third fixed joint (63) and the fourth fixed joint (311); The sealing structure (7) comprises a sealing ring (71) slidably mounted on the second fixed joint (61) and the third fixed joint (63); a sealing groove (72) is provided on the inner ring of the sealing ring (71); an annular airbag (73) is provided in the sealing groove (72); an accommodating groove (74) is provided on the outer wall of the sealing ring (71); a deflation valve (731) located in the accommodating groove (74) is provided on the annular airbag (73); the annular airbag (73) is also connected to an extruded inflatable balloon (732) located in the accommodating groove (74); and a protective cover (75) is clamped at the opening of the accommodating groove (74).

9. An open container ship according to claim 1, characterized in that: The bow platform (13) is provided with a lower living area (131); two anchor chain lockers (132) are provided on the side of the upper living area (125) and the lower living area (131) away from the cargo hold (11); the two anchor chain lockers (132) are connected to the bow main deck (12) and the bow platform (13) from top to bottom; an emergency fire fighting cabin (141) is provided on the bow bilge (14); fresh water tanks (142) and bow ballast water tanks (143) are provided on both sides of the emergency fire fighting cabin (141); the fresh water tank (142) is located between the cargo hold (11) and the bow ballast water tank (143); and a bow peak tank (144) is also provided on the end of the emergency fire fighting cabin (141) away from the cargo hold (11).

10. An open container ship according to claim 1, characterized in that: An emergency generator room (1241) is provided on the forecastle deck (124), and an emergency generator (1242) is provided in the emergency generator room (1241). The emergency generator (1242) is connected to a battery pack (1641) for use in emergency conditions.

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