Hatch of a transport vessel and transport vessel

Abstract

The utility model provides a cabin of transport ship and transport ship, and transport ship includes cabin and fuel tank, and fuel tank hoists in cabin. The cabin includes fuel cabin and passageway platform, and the passageway platform is set on the inner side wall of fuel cabin movably and surrounds, and the passageway platform can be in the folding state, to make the caliber of the containing space surrounded by passageway platform greater than the size of fuel tank, so that when hoisting fuel tank to cabin, fuel tank will not collide with cabin lateral wall, improve the safety when hoisting fuel tank. And, by setting movable connection between passageway platform and the inner side wall of fuel cabin, after installing fuel tank in fuel cabin, the passageway platform does not need to be welded again, avoid the problem such as the damage of fuel tank insulating layer by welding slag falling, the damage of protective coating in fuel cabin when welding, improve the quality of transport ship.

Description

Technical Field

[0001] This utility model relates to the field of transport ships, and in particular to a cargo hold and a transport ship. Background Technology

[0002] See Figure 1 Existing vessels used for transporting fuels such as liquefied natural gas (LNG) typically include a fuel tank (700), a fuel vessel (900), and an inspection access platform (800). During vessel construction, the fuel vessel must first be hoisted into the fuel tank, and then the inspection access platform is welded to the side wall of the fuel tank. However, welding the inspection access platform to the side wall of the fuel tank can easily lead to problems such as falling weld slag damaging the fuel vessel's insulation layer and damage to the protective coating inside the fuel tank, thus affecting the quality of the fuel tank and fuel vessel. Utility Model Content

[0003] The purpose of this invention is to solve the problem that welding after installing fuel tanks on existing fuel transport ships can easily damage the insulation layer of the fuel tanks and the protective coating inside the fuel tank.

[0004] To solve the above-mentioned technical problems, this utility model provides a ship's hold, including a fuel tank and a passageway platform; the fuel tank is used to house fuel tanks; the passageway platform is movably and surrounds the inner wall of the fuel tank, and is located outside the fuel tank, for personnel to walk around the fuel tank; when the passageway platform is in a folded state, the diameter of the accommodating space enclosed by the passageway platform is larger than the size of the fuel tank; when the passageway platform is in an unfolded state, the diameter of the accommodating space enclosed by the passageway platform is smaller than the size of the fuel tank.

[0005] In some embodiments of this application, a connecting seat is provided on the side wall of the fuel tank; one side of the channel platform is rotatably connected to the connecting seat, so that the channel platform can rotate relative to the inner side wall of the fuel tank to a folded state or an unfolded state.

[0006] In some embodiments of this application, the cabin further includes a first rotating shaft, which is connected to the channel platform and the connecting seat, and at least one of the first rotating shaft and the channel platform and the first rotating shaft and the connecting seat is rotatably connected, so that the channel platform can rotate relative to the connecting seat.

[0007] In some embodiments of this application, the channel platform is provided with a limiting part, and when the channel platform is rotated relative to the connecting seat to the unfolded state, the limiting part abuts against the inner wall of the fuel tank.

[0008] In some embodiments of this application, the passage platform includes a crossbeam rotatably connected to the connecting seat and a walkway slab disposed on the crossbeam. The walkway slab is fixed between the two end faces of the crossbeam along its length to allow people to walk. The limiting part is formed on the end face of the crossbeam near the connecting seat.

[0009] In some embodiments of this application, the cabin further includes a locking member connected to the passage platform and the connecting seat. The locking member is used to restrict the rotation of the passage platform relative to the connecting seat so that the passage platform is locked in an unfolded state and a folded state.

[0010] In some embodiments of this application, the connecting seat is provided with a first through hole, and the channel platform is provided with a second through hole. When the channel platform is in the unfolded state, the second through hole corresponds to the first through hole. The locking member includes a first locking member, which passes through the second through hole and the first through hole to lock the channel platform onto the connecting seat.

[0011] In some embodiments of this application, the locking member further includes a second locking member, which is connected to the end of the channel platform away from the connecting seat and the fuel tank to lock the channel platform in a folded state.

[0012] In some embodiments of this application, the cabin further includes a handrail connected to the end of the passage platform away from the connecting seat, and the handrail is arranged in a vertical direction.

[0013] In some embodiments of this application, the handrail is rotatably connected to the passage platform; the cabin also includes a locking structure connected to the passage platform and the handrail to restrict the handrail to a vertical position.

[0014] In some embodiments of this application, the end of the channel platform away from the connecting seat is provided with a third through hole; the lower end of the handrail is provided with a fourth through hole; the fourth through hole corresponds to the position of the third through hole; the locking structure passes through the fourth through hole and the third through hole and locks the handrail to the channel platform.

[0015] In some embodiments of this application, the cabin further includes a second pivot, which is connected to the passage platform and the handrail, and at least one of the second pivot and the passage platform and the handrail is rotatably connected, so that the handrail can rotate relative to the passage platform.

[0016] In some embodiments of this application, the end of the channel platform away from the connecting seat is provided with a fifth through hole, which is spaced apart from the third through hole; the lower end of the handrail is provided with a sixth through hole, which is spaced apart from the fourth through hole; the sixth through hole and the fifth through hole are positioned correspondingly; the second rotating shaft includes a connecting screw and a connecting nut, the connecting screw passes through the sixth through hole and the fifth through hole and is threadedly connected to the connecting nut, and at least one of the channel platform and the handrail can rotate with respect to the axis of the connecting screw.

[0017] A transport vessel includes a hold and a fuel tank, the fuel tank being hoisted into the fuel hold.

[0018] As can be seen from the above technical solution, the beneficial effects of this utility model are as follows:

[0019] The transport vessel of this application includes a hold and fuel tanks, with the fuel tanks hoisted inside the hold. The hold includes a fuel tank and a passageway platform. The passageway platform is movable and surrounds the inner wall of the fuel tank. When the passageway platform is folded, the diameter of the enclosed space is larger than the size of the fuel tank, ensuring that when the fuel tank is hoisted into the hold, the passageway platform is located outside the hoisting boundary of the fuel tank, preventing collision between the fuel tank and the hold sidewall, thus improving safety during fuel tank hoisting. When the passageway platform is extended, the diameter of the enclosed space is smaller than the size of the fuel tank, providing sufficient space for personnel to walk on the transport vessel and fully utilizing the width of the hold to increase the volume of the fuel tank. The passageway platform is movably connected to the inner wall of the fuel tank, eliminating the need to weld the passageway platform after the fuel tank is installed in the fuel tank. This avoids problems such as weld slag falling and damaging the fuel tank's insulation layer, and damage to the protective coating inside the fuel tank during welding, thus improving the quality of the transport vessel. Attached Figure Description

[0020] Figure 1 This is a structural diagram of an existing transport ship.

[0021] Figure 2 This is a schematic diagram of the structure of a transport ship in one embodiment of this application.

[0022] Figure 3 This is a schematic diagram of the connection structure between the channel platform and the fuel tank in one embodiment.

[0023] Figure 4 yes Figure 3 The diagram shown is an exploded view of the connection structure after removing the first rotating shaft, the second rotating shaft, the locking component, and the locking structure.

[0024] Figure 5This is a schematic diagram of the channel platform switching between an expanded state and a folded state in one embodiment.

[0025] Figure 6 This is a schematic diagram of the inspection channel platform in another embodiment switching between an unfolded state and a folded state.

[0026] The annotations in the attached figures are explained as follows:

[0027] 700 - Fuel tank; 800 - Access platform; 900 - Fuel tank;

[0028] 100-Boat compartment; 200-Fuel tank; 1-Fuel tank; 11-Connecting seat; 111-Through hole of pivot; 112-First through hole; 2-Passage platform; 21-Crossbeam; 211-Limiting part; 212-Mounting through hole; 213-Second through hole; 214-Seventh through hole; 215-Third through hole; 216-Fifth through hole; 22-Walkway slab; 3-First pivot; 4-Locking component; 41-First locking component; 42-Second locking component; 421-Connecting component; 422-Hook; 5-Handrail; 51-Fourth through hole; 52-Sixth through hole; 6-Second pivot; 7-Locking structure. Detailed Implementation

[0029] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0030] In the description of this application, it should be understood that, in the embodiments shown in the accompanying drawings, the indications of direction or positional relationships (such as up, down, left, right, front, and back) are merely 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. These descriptions are appropriate when these elements are in the positions shown in the accompanying drawings. If the description of the positions of these elements changes, these directional indications also change accordingly.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] like Figure 1As shown, existing fuel transport ships typically include a fuel tank 700, a fuel container 900, and a passageway platform 800. The fuel container 900 is hoisted inside the fuel tank 700, and the passageway platform 800 is arranged around the inner wall of the fuel tank 700, allowing workers to walk on the passageway platform 800 to move around the fuel container 900 for inspection. In existing technology, during the production of transport ships, the fuel container 900 needs to be hoisted into the fuel tank 700 first, and then the passageway platform 800 is welded onto the side wall of the fuel tank 700. During the welding of the passageway platform 800 onto the side wall of the fuel tank 700, falling weld slag can damage the insulation layer of the fuel container 900, and the welding process can also damage the protective coating inside the fuel tank 700, thus affecting the quality of both the fuel tank 700 and the fuel container 900. Furthermore, welding the passageway platform 800, located above the fuel container 900, is a high-altitude operation, posing significant safety hazards to construction workers. Moreover, the channel platform 800 is arranged around the entire fuel tank 700, so the construction work is huge and the time spent on the slipway is very long.

[0033] See Figure 2 To address the problems existing in the production of transport ships in the prior art, this application proposes a transport ship comprising a hold 100 and a fuel tank 200. The hold 100 includes a fuel tank 1 and a passageway platform 2. The fuel tank 200 is hoisted into the fuel tank 1 of the hold 100. When the fuel tank 200 is hoisted into the fuel tank 1, it descends from directly above the fuel tank 1, thereby forming the hoisting boundary of the fuel tank 200 with the edge of its vertical projected area. That is, the trajectory of the fuel tank 200 entering the fuel tank 1 at its widest position forms the hoisting boundary of the fuel tank 200. The passageway platform 2 is movably connected to the fuel tank 1, allowing the passageway platform 2 to be adjusted to a folded or unfolded state. At the projection angle of the horizontal plane of the fuel tank 1 (i.e., the projection in the vertical direction), when the passage platform 2 is in the folded state, the diameter of the accommodating space enclosed by the passage platform 2 is larger than the size of the fuel tank 200. That is, the passage platform 2 is located outside the lifting boundary of the fuel tank 200, so that when the fuel tank 200 is lifted into the fuel tank 1, the fuel tank 200 will not collide with the side wall of the fuel tank 1 or the passage platform 2, thus improving the safety when lifting the fuel tank 200.

[0034] The fuel tank 200 is approximately horizontally cylindrical in shape. The diameter of the fuel tank 200 is slightly smaller than the width of the inner cavity of the fuel tank 1 used to accommodate the fuel tank 200, allowing the fuel tank 200 to be installed inside the fuel tank 1 by hoisting. Figure 2In the illustrated embodiment, the fuel tank 200 has a circular cross-section, providing space for the installation of the access platform 2 between the upper and lower sidewalls of the fuel tank 1 and the fuel tank 200. This also allows the radial dimension of the fuel tank 200 to be designed to be as large as possible, thereby fully utilizing the internal space of the fuel tank 1 and improving the carrying capacity of the transport ship. In other embodiments, the fuel tank 200 may also be other shapes, such as a cuboid or a sphere.

[0035] exist Figure 2 In the illustrated embodiment, two access platforms 2 are provided on the inner wall of the fuel tank 1. The lower access platform 2 is located at the lower end of the fuel tank 1 and below the maximum width of the fuel tank 200. This access platform 2 does not affect the hoisting of the fuel tank 200. Therefore, the lower access platform 2 can be installed before hoisting the fuel tank 200. Moreover, the lower access platform 2 can be a fixed structure, a flip-up structure, or a detachable structure. The upper access platform 2 is located at the upper end of the fuel tank 1 and above the maximum width of the fuel tank 200. When the access platform 2 is in the unfolded state, part of the access platform 2 is located inside the hoisting boundary of the fuel tank 200. In this application, at least the upper access platform 2 is movably connected to the fuel tank 1, allowing the access platform 2 to be adjusted to a folded state. When the access platform 2 is in the folded state, the access platform 2 is completely outside the hoisting boundary of the fuel tank 200, so that the diameter of the accommodating space enclosed by the access platform 2 is larger than the size of the fuel tank 200, thus not affecting the hoisting of the fuel tank 200. When the upper passage platform 2 is in the unfolded state, the diameter of the accommodating space enclosed by the passage platform 2 is smaller than the size of the fuel tank 200. That is, part of the passage platform 2 is located within the lifting boundary of the fuel tank 200 and does not mechanically interfere with the fuel tank 200, thereby making full use of the space outside the fuel tank 200 so that the passage platform 2 has enough space for personnel to walk.

[0036] In other words, such as Figure 5 and Figure 6As shown, the width of the passageway platform 2 for personnel to walk on is at least L1. Therefore, the width of the passageway platform 2 in its extended state is greater than or equal to L1, and the width of the passageway platform 2 in its folded state is L2, where L2 is much smaller than L1. This application sets the distance between the lifting boundary of the fuel tank 200 and the inner wall of the fuel tank 1 to L3, where L3 is less than L1 and greater than L2. Furthermore, it sets at least the upper passageway platform 2 and the fuel tank 1 to be movably connected, allowing the passageway platform 2 to be adjusted to a folded state when lifting the fuel tank 200, ensuring that the passageway platform 2 is completely outside the lifting boundary of the fuel tank 200, thus enabling the fuel tank 200 to be smoothly lifted into the fuel tank 1. After the fuel tank 200 is lifted into the fuel tank 1, the passageway platform 2 is then adjusted to its extended state, allowing personnel to walk on it. Furthermore, the diameter of the fuel tank 200 can be set to be larger (L3 slightly larger than L2), making full use of the width of the fuel tank 1 to increase the volume of the fuel tank 200; and after the fuel tank 200 is hoisted onto the fuel tank 1, there is no need to weld the passage platform 2, avoiding problems such as weld slag falling and damaging the insulation layer of the fuel tank 200, and damage to the protective coating inside the fuel tank 1 during welding, thus improving the quality of the transport ship. The movable connection between the passage platform 2 and the fuel tank 1 can be a swivel connection, a detachable connection, etc.

[0037] Example 1:

[0038] See Figure 3 and Figure 4 The movable connection between the passage platform 2 and the fuel tank 1 is a rotatable connection, meaning the passage platform 2 is a flip-up structure. Specifically, a connecting seat 11 is provided on the side wall of the fuel tank 1, and the ship's compartment 100 also includes a first rotating shaft 3. The passage platform 2 is rotatably connected to the connecting seat 11 via the first rotating shaft 3, allowing the passage platform 2 to flip up and down relative to the connecting seat 11, thus forming a flip-up structure. The passage platform 2 can rotate relative to the connecting seat 11 to a folded state or an unfolded state. When the passage platform 2 rotates relative to the connecting seat 11 to the folded state, the passage platform 2 is in or close to a vertical state, reducing the area occupied by the passage platform 2 in the vertical projection. This makes the width of the passage platform 2 smaller than the distance between the fuel tank 200 at its widest position and the inner side wall of the fuel tank 1. In other words, the diameter of the accommodating space enclosed by the passage platform 2 is larger than the size of the fuel tank 200, ensuring that the passage platform 2 does not affect the hoisting of the fuel tank 200. When the passage platform 2 is rotated to the unfolded state relative to the connecting seat 11, the passage platform 2 is in or close to a horizontal state, so that personnel inspecting the quality of the transport ship can walk on the passage platform 2 to inspect the quality of the transport ship.

[0039] When the channel platform 2 is in the unfolded state, its width can be greater than the distance between the maximum position of the fuel tank 200 in the width direction and the inner wall of the fuel compartment 1. That is, the diameter of the accommodating space enclosed by the channel platform 2 is smaller than the size of the fuel tank 200, so as to make full use of the width of the fuel compartment 1 and increase the volume of the fuel tank 200.

[0040] The connecting seat 11 is welded to the inner wall of the fuel tank 1. The connecting seat 11 is welded to the inner wall of the fuel tank 1 before the protective coating is applied to the fuel tank 1, ensuring that the welding between the connecting seat 11 and the fuel tank 1 does not damage the protective coating inside the fuel tank 1. In other embodiments, the connecting seat 11 can also be connected to the inner wall of the fuel tank 1 by screws, or the connecting seat 11 can be integrally formed with the fuel tank 1.

[0041] The width of the connecting seat 11 is less than the distance between the fuel tank 200 at its widest point and the inner wall of the fuel compartment 1. That is, the connecting seat 11 is located outside the lifting boundary of the fuel tank 200, ensuring that it does not interfere with the lifting of the fuel tank 200. Multiple connecting seats 11 are provided, spaced apart along the entire inner edge of the fuel compartment 1. Each connecting seat 11 has a first through hole 112 and a shaft through hole 111 for connecting the first rotating shaft 3, with the first through hole 112 and the shaft through hole 111 spaced apart.

[0042] The passageway platform 2 includes crossbeams 21 and walkway slabs 22 mounted on the crossbeams 21. Multiple crossbeams 21 are provided, each corresponding to a specific connecting seat 11. Each crossbeam 21 is elongated, with one end rotatably connected to a connecting seat 11 via a first pivot 3, and the other end free. The crossbeams 21 can rotate around the axis of the first pivot 3 to an unfolded state and also to a folded state. When folded, the free end of the crossbeam 21 is located above or below the connecting seat 11. When unfolded, the crossbeams 21 extend horizontally. The walkway slabs 22 are connected to adjacent crossbeams 21 and located between the two ends of the crossbeams 21 along their length, providing passage for personnel on the inspection transport ship. It should be noted that the passageway platform 2 can also be a plate, with the plate directly connected to the connecting seat 11.

[0043] The passageway platform 2 is equipped with a limiting part 211. When the passageway platform 2 rotates to the deployed state, the limiting part 211 abuts against the inner wall of the fuel tank 1, preventing the passageway platform 2 from continuing to rotate and thus restricting it to the deployed state. Figure 4In the illustrated embodiment, a limiting part 211 is formed on the end face of the crossbeam 21 near the connecting seat 11. When the passage platform 2 rotates from the folded state to the unfolded state, the end face of the crossbeam 21 just abuts against the inner wall of the fuel tank 1, preventing the crossbeam 21 from rotating further downwards, thus restricting the passage platform 2 to the unfolded state. This design simplifies the overall structure of the passage platform 2, making installation easier and reducing costs. In other embodiments, the limiting part 211 can also be a limiting structure provided at the end of the crossbeam 21 near the connecting seat 11, with the limiting structure being an integral part of the crossbeam 21, or the limiting structure being fixedly connected to the bottom surface of the crossbeam 21.

[0044] The crossbeam 21 has a mounting through hole 212 near the connecting seat 11, and the position of the mounting through hole 212 corresponds to the position of the rotating shaft through hole 111. The first rotating shaft 3 passes through the mounting through hole 212 and the rotating shaft through hole 111, and at least one of the first rotating shaft 3 and the crossbeam 21 and the first rotating shaft 3 and the connecting seat 11 is rotatably connected, thereby realizing the rotatable connection between the crossbeam 21 and the connecting seat 11. In other embodiments, the first rotating shaft 3 may be an integral structure with the crossbeam 21, or the first rotating shaft 3 may be an integral structure with the connecting seat 11.

[0045] In one embodiment, the crossbeam 21 is provided with a plurality of through holes at the end away from the mounting base, the plurality of through holes being used to connect the handrail 5 described below or the second locking member 42 described below.

[0046] The passageway platform 2 also includes a locking element 4, which is connected to the crossbeam 21 and the connecting seat 11 to restrict the rotation of the crossbeam 21 relative to the connecting seat 11, thus locking the passageway platform 2 in either the extended or folded state. Locking the passageway platform 2 in the extended state with the locking element 4 prevents vibration during the transport ship's navigation. Locking the passageway platform 2 in the folded state with the locking element 4 prevents it from automatically flipping back to the extended state when hoisting the fuel tank 200, thus avoiding interference with the hoisting of the fuel tank 200.

[0047] In one embodiment, the connecting seat 11 has a first through hole 112, and the crossbeam 21 has a second through hole 213. When the channel platform 2 is in the unfolded state, the second through hole 213 corresponds to the first through hole 112. The locking member 4 includes a first locking member 41, which passes through the second through hole 213 and the first through hole 112 to lock the crossbeam 21 onto the connecting seat 11. In this embodiment, the first locking member 41 can be a screw structure or a pin structure. For example, the first locking member 41 is a screw structure, which includes a first screw and a first nut. The first screw passes through the second through hole 213 and the first through hole 112 and is threadedly connected to the first nut to lock the crossbeam 21 onto the connecting seat 11.

[0048] In one embodiment, when the passage platform 2 is in the folded state, the free end of the crossbeam 21 is located above the connecting seat 11. When the passage platform 2 rotates from the folded state to the unfolded state, the limiting part 211 of the crossbeam 21 restricts the passage platform 2 to the unfolded state, so that workers can stand on the walkway 22 to install the first locking member 41, thereby making it more convenient to install the first locking member 41, reducing the production difficulty of the transport ship, and avoiding high-altitude operations, thus improving the safety of construction workers.

[0049] The locking member 4 also includes a second locking member 42, which is connected to the end of the crossbeam 21 away from the connecting seat 11 and the fuel tank 1 of the transport ship to lock the passage platform 2 in a folded state. In one embodiment, the second locking member 42 includes a hook 422 disposed on the fuel tank 1 and located above the mounting seat, and a connector 421 for fixing the free end of the crossbeam 21 to the hook 422. The connector 421 may be a rope or a bolt.

[0050] exist Figure 3 In the embodiment shown, the multiple through holes provided at the end of the crossbeam 21 away from the mounting base include a seventh through hole 214. The connecting member of the second locking member 42 is a binding rope 421. The binding rope 421 passes through the seventh through hole 214 and is tied to the hook 422, so that the crossbeam 21 will not rotate to the unfolded state under its own weight, thereby locking the channel platform 2 in the folded state.

[0051] The walkway platform 2 also includes a handrail 5, a second pivot 6, and a locking structure 7. The handrail 5 is connected to the end of the crossbeam 21 away from the connecting seat 11 via the second pivot 6. The locking structure 7 is connected to the crossbeam 21 and the handrail 5 to restrict the handrail 5 to a vertical position. After the locking structure 7 locks the handrail 5 onto the crossbeam 21, the handrail 5 and the crossbeam 21 form an L-shape (the crossbeam 21 is in the extended state). The handrail 5 is used to prevent construction workers or inspection transport ship personnel from falling off the walkway slab 22, improving safety. It should be noted that the handrail 5 can also be connected to the walkway slab 22.

[0052] When the passage platform 2 needs to be rotated to the folded state, the locking structure 7 is released from the handrail 5, for example, by removing the locking structure 7 from the handrail 5 and the crossbeam 21. This allows the handrail 5 to rotate relative to the crossbeam 21 around the second pivot 6, so that the handrail 5 is folded onto the crossbeam 21, or the handrail 5 and the crossbeam 21 are close to being on a vertical line. This ensures that the handrail 5 does not affect the rotation of the crossbeam 21, nor does it affect the hoisting of the fuel tank 200.

[0053] exist Figure 3 and Figure 4In the illustrated embodiment, the end of the crossbeam 21 away from the connecting seat 11 is provided with a third through hole 215, meaning that the multiple through holes provided at the end of the crossbeam 21 away from the mounting seat include the third through hole 215. The lower end of the handrail 5 is provided with a fourth through hole 51, which corresponds to the position of the third through hole 215. A locking structure 7 passes through the fourth through hole 51 and the third through hole 215, locking the handrail 5 to the crossbeam 21. In this embodiment, the locking structure 7 is a screw structure or a pin structure. For example, the locking structure 7 is a screw structure, which includes a second screw and a second nut. The second screw passes through the fourth through hole 51 and the third through hole 215 and is threadedly connected to the second nut to lock the handrail 5 to the crossbeam 21. In this embodiment, the seventh through hole 214 may not be provided on the crossbeam 21; the connecting piece of the second locking member 42 and the third through hole 215 are sufficient to lock the passage platform 2 in a folded state.

[0054] The end of the crossbeam 21 furthest from the connecting seat 11 is also provided with a fifth through hole 216. That is, among the multiple through holes located at the end of the crossbeam 21 furthest from the mounting seat, the fifth through hole 216 is spaced apart from the third through hole 215. The lower end of the handrail 5 is also provided with a sixth through hole 52, which is spaced apart from the fourth through hole 51. The positions of the sixth through hole 52 and the fifth through hole 216 correspond. The second rotating shaft 6 passes through the sixth through hole 52 and the fifth through hole 216. At least one of the second rotating shaft 6 and the crossbeam 21, and the second rotating shaft 6 and the handrail 5, is rotatably connected, allowing the handrail 5 to rotate relative to the crossbeam 21.

[0055] In one embodiment, the second rotating shaft 6 is a screw structure, and the second rotating shaft 6 is detachably connected to the crossbeam 21 and the handrail 5, thereby allowing the handrail 5 to be removed from the crossbeam 21, that is, the handrail 5 and the crossbeam 21 are also detachably connected. Since both the second rotating shaft 6 and the locking structure 7 are screw structures, when it is necessary to rotate the handrail 5, disassembling the locking structure 7 allows the handrail 5 to rotate relative to the crossbeam 21 around the second rotating shaft 6, as shown below. Figure 5 As shown. Alternatively, disassembling the second pivot 6 allows the handrail 5 to rotate relative to the crossbeam 21 around the locking structure 7, as shown. Figure 6 As shown. For example, the second rotating shaft 6 includes a connecting screw and a connecting nut. The connecting screw passes through the sixth through hole 52 and the fifth through hole 216 and is threadedly connected to the connecting nut. The connecting screw can rotate relative to the crossbeam 21 or the handrail 5, thereby realizing the rotational connection between the handrail 5 and the crossbeam 21.

[0056] When manufacturing the transport ship, the connecting seat 11 can be first installed on the inner wall of the fuel tank 1, and the passage platform 2 can be rotated to a folded state, so that the passage platform 2 is located outside the lifting boundary of the fuel tank 200, ensuring that the diameter of the accommodating space enclosed by the passage platform 2 is larger than the size of the fuel tank 200. Then, the fuel tank 200 is lifted into the fuel tank 1, and the passage platform 2 is rotated to an unfolded state, completing the production of the transport ship. This eliminates the need to weld the passage platform 2 after installing the fuel tank 200, avoiding problems such as weld slag falling and damaging the insulation layer of the fuel tank 200, and damage to the protective coating inside the fuel tank 1 during welding. Moreover, when installing the passage platform 2, only the connection between the crossbeam 21 and the mounting seat via the first rotating shaft 3 requires high-altitude work, reducing high-altitude work procedures and improving the safety of construction personnel; it also reduces the installation difficulty of the passage platform 2, thereby shortening the time required for installation, improving production efficiency, and effectively saving the production cost of the transport ship.

[0057] The handrail can be pre-installed on the passage platform 2 before the fuel tank 200 is hoisted into the fuel tank 1, or it can be installed on the passage platform 2 after the fuel tank 200 is hoisted into the fuel tank 1 and the passage platform 2 is rotated to the unfolded state.

[0058] Example 2:

[0059] The difference between Embodiment 2 and Embodiment 1 is that the movable connection between the channel platform 2 and the fuel tank 1 is a detachable connection, meaning the channel platform 2 is a detachable structure. The connection between the channel platform 2 and the connecting seat 11 is also detachable, allowing the channel platform 2 to be removed from the connecting seat 11. Other structural features are the same as in Embodiment 1. Before hoisting the fuel tank 200, the channel platform 2 is detached from the connecting seat 11 and placed in a folded state, ensuring that the channel platform 2 does not interfere with the hoisting of the fuel tank 200. After the fuel tank 200 is hoisted into the fuel tank 1, the channel platform 2 is detachably fixed to the side wall of the fuel tank 1 using screws or other means, allowing the channel platform 2 to be in an unfolded state.

[0060] In one embodiment, the first rotating shaft 3 is a screw structure and can be detached from the crossbeam 21 and the connecting seat 11, thereby achieving disassembly between the crossbeam 21 and the connecting seat 11 by removing the first rotating shaft 3 and the locking member 4. For example, the first rotating shaft 3 includes a third screw and a third nut. The third screw passes through the mounting through hole 212 and the rotating shaft through hole 111 and is threadedly connected to the third nut. The third screw can rotate relative to the crossbeam 21 or the connecting seat 11, thereby achieving a rotatable connection between the handrail 5 and the crossbeam 21. In other embodiments, the channel platform 2 and the connecting seat 11 are detachably connected by means of snap-fit ​​connection or other methods.

[0061] The detachable connection between the channel platform 2 and the connecting seat 11 allows for the following steps during the production of the transport ship: first, the connecting seat 11 is installed on the inner wall of the fuel tank 1, and then the channel platform 2 is detached from the connecting seat 11, allowing the fuel tank 200 to be hoisted into the fuel tank 1. Next, the channel platform 2 is installed on the connecting seat 11, completing the production of the transport ship. This eliminates the need to weld the channel platform 2 after installing the fuel tank 200, avoiding problems such as weld slag falling and damaging the insulation layer of the fuel tank 200, and damage to the protective coating inside the fuel tank 1 during welding. Furthermore, the installation of the channel platform 2 only requires connecting the crossbeam 21 to the mounting seat, reducing the need for high-altitude work and improving the safety of construction personnel. It also reduces the installation difficulty of the channel platform 2, thereby shortening the installation time and improving production efficiency.

[0062] In this application, the passage platform 2 and the handrail 5 can be prefabricated as independent modules in the production workshop and then installed on the fuel tank 1, thereby reducing the production cycle.

[0063] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A cargo hold of a transport ship, characterized in that, include: Fuel tank, used to house fuel tanks; A passageway platform is movable and can be arranged around the inner wall of the fuel tank, and the passageway platform is located outside the fuel tank, for personnel to walk around the fuel tank; At the projection angle of the horizontal plane of the fuel tank, when the passage platform is in the folded state, the diameter of the accommodating space enclosed by the passage platform is larger than the size of the fuel tank; when the passage platform is in the unfolded state, the diameter of the accommodating space enclosed by the passage platform is smaller than the size of the fuel tank.

2. The ship's hold according to claim 1, characterized in that, A connecting seat is provided on the side wall of the fuel tank; One side of the channel platform is rotatably connected to the connecting seat, allowing the channel platform to rotate relative to the inner wall of the fuel tank to a folded or unfolded state.

3. The ship's hold according to claim 2, characterized in that, The cabin also includes a first rotating shaft, which is connected to the passage platform and the connecting seat. At least one of the first rotating shaft and the passage platform and the first rotating shaft and the connecting seat is rotatably connected, so that the passage platform can rotate relative to the connecting seat.

4. The ship's hold according to claim 2, characterized in that, The channel platform is provided with a limiting part. When the channel platform is rotated to the unfolded state relative to the connecting seat, the limiting part abuts against the inner wall of the fuel tank.

5. The ship's hold according to claim 4, characterized in that, The passage platform includes a crossbeam rotatably connected to the connecting seat and a walkway slab disposed on the crossbeam. The walkway slab is fixed between the two end faces of the crossbeam along its length to allow people to walk. The limiting part is formed on the end face of the crossbeam near the connecting seat.

6. The ship's hold according to claim 2, characterized in that, The cabin also includes a locking device connected to the passage platform and the connecting seat. The locking device is used to restrict the rotation of the passage platform relative to the connecting seat so that the passage platform is locked in the unfolded state and the folded state.

7. The ship's hold according to claim 6, characterized in that, The connecting seat is provided with a first through hole, and the channel platform is provided with a second through hole. When the channel platform is in the unfolded state, the second through hole corresponds to the first through hole. The locking element includes a first locking element, which passes through the second through hole and the first through hole to lock the channel platform onto the connecting seat.

8. The ship's hold according to claim 6, characterized in that, The locking mechanism further includes a second locking mechanism, which is connected to the end of the passage platform away from the connecting seat and the fuel tank to lock the passage platform in a folded state.

9. The ship's hold according to claim 2, characterized in that, The cabin also includes a handrail connected to the end of the passage platform away from the connecting seat, and the handrail is arranged in a vertical direction.

10. The ship's hold according to claim 9, characterized in that, The handrail is rotatably connected to the passage platform; The cabin also includes a locking structure connected to the passage platform and the handrail to restrict the handrail to a vertical position.

11. The ship's hold according to claim 10, characterized in that, The channel platform has a third through hole at the end away from the connecting seat; the lower end of the handrail has a fourth through hole; the fourth through hole corresponds to the position of the third through hole; The locking structure passes through the fourth through hole and the third through hole and locks the handrail to the channel platform.

12. The ship's hold according to claim 11, characterized in that, The cabin also includes a second pivot, which is connected to the passage platform and the handrail. At least one of the second pivot and the passage platform and the handrail is rotatably connected, so that the handrail can rotate relative to the passage platform.

13. The ship's hold according to claim 12, characterized in that, The channel platform is provided with a fifth through hole at the end away from the connecting seat, and the fifth through hole is spaced apart from the third through hole; the lower end of the handrail is provided with a sixth through hole, and the sixth through hole is spaced apart from the fourth through hole; the sixth through hole and the fifth through hole are positioned correspondingly; the second rotating shaft includes a connecting screw and a connecting nut, the connecting screw passes through the sixth through hole and the fifth through hole and is threadedly connected to the connecting nut, and at least one of the channel platform and the handrail can rotate with the axis of the connecting screw.

14. A transport ship, characterized in that, Includes the ship's hold and fuel tank as described in any one of claims 1-13, wherein the fuel tank is hoisted inside the fuel hold.

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