Auxiliary structure for semi-submersible LNG fuel tank barge

Abstract

The utility model relates to the field of ship construction provides the auxiliary structure of LNG fuel tank half ship drift. Including a plurality of structural components, structural components are installed on the half ship closing surface, and structural components include a pair of box type structural components and a pair of plate type structural components, a pair of box type structural components are installed on the both sides of vertical center line of half ship closing surface, and are welded and fixed with ship bottom deck, a pair of plate type structural components are respectively welded in the left and right sides position of half ship closing surface, and are located between two deck surfaces. Through a pair of box type structural components and a pair of plate type structural components are installed on the closing surface, and are reinforced through doing structure, form four independent structures on the closing surface and rely on, facilitate the operation of the tug in the drift, ensure that the fuel tank body structure is not affected by the drift, reduce the difficulty of LNG fuel tank half ship drift.

Description

Technical Field

[0001] This utility model relates to the field of shipbuilding, specifically to an auxiliary structure for half-ship drifting of LNG fuel tanks. Background Technology

[0002] With the increasing global demand for clean energy, liquefied natural gas (LNG), as a clean and efficient energy source, is being used more and more widely in the shipping sector. As a key component for storing LNG, the safety and stability of the LNG fuel tank are paramount. During the construction of an LNG fuel tank semi-hull, due to the unique structure of the semi-hull, its center of gravity is unevenly distributed, and it is susceptible to drifting due to various environmental factors such as water flow and wind during operations on water. While traditional mooring methods can provide some restraint, under complex operating conditions, such as strong water flow impacts and sudden wind changes, the stress on the mooring lines becomes complex, making it difficult to precisely control the position and attitude of the semi-hull. This could lead to collisions with surrounding facilities, causing equipment damage and safety accidents, threatening the lives of construction personnel, affecting construction progress and quality, and increasing construction costs.

[0003] Unlike ordinary semi-hulls, LNG fuel tankers do not provide sufficient structural support for tugboats during drift. Existing auxiliary positioning methods often require significant manpower and resources, are complex to operate, and are inefficient, failing to meet the requirements of rapid, efficient, and safe shipbuilding in modern times. Therefore, there is an urgent need for an auxiliary device that can effectively solve the drift problem of LNG fuel tank semi-hulls, improve the stability and safety of semi-hulls during water operations, reduce construction risks and costs, and ensure the smooth progress of LNG fuel tank semi-hull construction and subsequent related operations. Summary of the Invention

[0004] To address the issue of half-ship drift in LNG fuel tanks, this invention provides an auxiliary structure for mitigating half-ship drift in LNG fuel tanks.

[0005] The technical solution adopted by this utility model is as follows:

[0006] The auxiliary structure for LNG fuel tank semi-drift includes multiple structural components installed on the semi-ship closure surface. These components include a pair of box-type structural components and a pair of plate-type structural components. The box-type structural components are installed on both sides of the vertical centerline of the semi-ship closure surface and welded to the bottom deck of the hull. The plate-type structural components are welded to the left and right sides of the semi-ship closure surface, respectively, and located between two deck surfaces. Each box-type structural component includes a forward transverse bulkhead, a pair of side bulkheads, an aft transverse bulkhead, and a top plate. The aft transverse bulkhead is diagonally braced outwards from the closure surface. The container is positioned at an angle to the deck. A pair of sidewalls are right-angled trapezoids. The forward transverse bulkhead, a pair of sidewalls, and the aft transverse bulkhead are welded together to form the four sidewalls of the box-type structural assembly. The bottom of the four sidewalls is fixedly welded to the bottom deck of the hull. The top of the box-type structural assembly is provided with a top plate assembly, which includes a top plate and a top plate reinforcement structure. The top plate reinforcement structure includes a transverse U-shaped plate and a longitudinal U-shaped plate welded to the bottom of the top plate. The two sides of the transverse U-shaped plate are welded and fixed to the inner walls of the pair of sidewalls, and the two sides of the longitudinal U-shaped plate are welded and fixed to the forward transverse bulkhead and the aft transverse bulkhead, respectively.

[0007] Furthermore, the plate structure component includes a steel plate and a reinforcing structure welded to the back of the steel plate. The reinforcing structure includes multiple vertical ribs and multiple inclined ribs that intersect with the vertical ribs. The two ends of the vertical ribs are welded and fixed to the horizontally arranged angle steel on the two deck structures. The two ends of the inclined ribs are welded and fixed to the angle steel structures on the hull plates and inner bulkheads. The intersections of the vertical ribs and the inclined ribs are fixedly welded.

[0008] Furthermore, multiple ribs evenly distributed along the width direction are welded onto the inner sidewalls of the front transverse wall plate and the side wall plate, respectively.

[0009] Furthermore, the two sidewalls are reinforced with elbow plates by welding.

[0010] Furthermore, multiple longitudinal reinforcing plates are welded and installed between the pair of sidewall panels.

[0011] Furthermore, multiple vertical reinforcing members are welded between the front and rear transverse wall panels.

[0012] Furthermore, a reinforcing plate is welded between the bottom of the rear transverse wall panel and the deck.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are as follows: by installing a pair of box-type structural components and a pair of plate-type structural components on the closure surface, and by making structural reinforcement, four independent structural supports are formed on the closure surface, which facilitates the operation of the tugboat during drift, ensures that the fuel tank body structure is not affected by drift, and reduces the difficulty of half-ship drift of LNG fuel tank. Attached Figure Description

[0014] Figure 1 To construct a distribution diagram of the components on the mating surface.

[0015] Figure 2 This is a schematic diagram of the installation of the box-type structural components.

[0016] Figure 3 This is a rear view of the box-type construction component.

[0017] Figure 4 This is a structural diagram of the top plate of a box-type structural component.

[0018] Figure 5 This is a structural diagram of a plate-type structural component.

[0019] In the figure: box-type structural component 1, front transverse wall panel 11, a pair of side wall panels 12, rear transverse wall panel 13, top plate assembly 14, top plate 141, transverse U-shaped plate 142, longitudinal U-shaped plate 143, vertical reinforcing member 15, longitudinal reinforcing plate 16, plate-type structural component 2, steel plate 21, reinforcing structure 22, deck 3, elbow plate 4, reinforcing plate 5. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0021] like Figure 1 As shown, the auxiliary structure for the LNG fuel tank half-ship drifting is installed on the closure surface of the LNG fuel tank half-ship to provide support to the tugboat during drifting. The auxiliary structure consists of four structural components: two box-type structural components 1 and two plate-type structural components 2. The box-type structural components 1 are installed on both sides of the vertical centerline of the half-ship closure surface and welded to the bottom deck 3 of the hull. The two box-type structural components 1 have a height difference to facilitate the tugboat's movement during operation.

[0022] The box-type structural assembly 1 consists of a forward transverse bulkhead 11, a pair of side bulkheads 12, an aft transverse bulkhead 13, and a top plate assembly 14. Multiple ribs evenly distributed along the width direction are welded to the inner walls of the transverse bulkheads 11 and side bulkheads 12. The forward transverse bulkhead 11 is vertically positioned, while the aft transverse bulkhead 13 is angled outwards towards the outer side of the closure surface, forming an angle with the deck 3. The pair of side bulkheads 12 are right-angled trapezoids. The forward transverse bulkhead 11, the pair of side bulkheads 12, and the aft transverse bulkhead 13 are welded together to form the four side walls of the box-type structural assembly. The bottoms of the four side walls are fixedly welded to the bottom deck 3 of the hull, forming a stable structure. The pair of side bulkheads 12 are reinforced to the deck 3 by welding elbow plates 4, and the bottom of the aft transverse bulkhead 13 is reinforced to the deck 3 by welding reinforcing plates 5. Inside the box-type structural assembly, multiple vertical reinforcing members 15 are welded between the front transverse wall panel 11 and the rear transverse wall panel 13, and multiple longitudinal reinforcing plates 16 are welded and installed between a pair of side wall panels 12. The cross-arranged vertical reinforcing members 15 and longitudinal reinforcing plates 16 make the structure more stable.

[0023] A top plate assembly 14 is welded to the top of the box-type structural component 1. The top plate assembly 14 consists of a top plate 141 and a top plate reinforcement structure welded to the bottom of the top plate. The top plate reinforcement structure consists of a transverse U-shaped plate 142 and multiple longitudinal U-shaped plates 143. The transverse U-shaped plate 142 is inserted into the box body, and its two sides are welded and fixed to the inner walls of a pair of side wall plates 12 respectively. The longitudinal U-shaped plates 143 are inserted into the box body, and their two sides are welded and fixed to the front transverse wall plate 11 and the rear transverse wall plate 13 respectively, further reinforcing the box-type structural component 1.

[0024] A pair of plate structural components 2 are welded to the left and right sides of the half-ship's joining surface, located between the two deck surfaces at the bottom. Each plate structural component 2 includes a steel plate 21 and a reinforcing structure 22 welded to the back of the steel plate. The reinforcing structure 22 consists of multiple vertical ribs and multiple inclined ribs intersecting the vertical ribs. The two ends of the vertical ribs are welded and fixed to the horizontally arranged angle steel on the two deck structures; the two ends of the inclined ribs are welded and fixed to the angle steel structures on the hull plating and inner bulkheads, and the intersection points of the vertical and inclined ribs are fixedly welded, thereby reinforcing the plate structural components.

[0025] This technical solution has a simple structure, is easy to install and disassemble, and can effectively provide support and reduce the risk of collision with the fuel tank during drifting.

Claims

1. An auxiliary structure for LNG fuel tank half-ship drifting, comprising multiple structural components mounted on the half-ship joining surface, characterized in that, The structural components include a pair of box-type structural components and a pair of plate-type structural components. The pair of box-type structural components are installed on both sides of the vertical centerline of the half-ship closure surface and welded to the bottom deck of the hull. The pair of plate-type structural components are welded to the left and right sides of the half-ship closure surface, respectively, and located between the two deck surfaces. The box-type structural components include a forward transverse bulkhead, a pair of side bulkheads, an aft transverse bulkhead, and a top plate. The aft transverse bulkhead is diagonally braced outwards from the closure surface, forming an angle with the deck. The pair of side bulkheads are right-angled trapezoids. The four sidewalls of the box-type structural assembly are formed by welding the forward transverse bulkhead, a pair of side bulkheads, and the aft transverse bulkhead. The bottom of the four sidewalls is fixedly welded to the bottom deck of the hull. The top of the box-type structural assembly is provided with a top plate assembly, which includes a top plate and a top plate reinforcement structure. The top plate reinforcement structure includes a transverse U-shaped plate and a longitudinal U-shaped plate welded to the bottom of the top plate. The two sides of the transverse U-shaped plate are welded and fixed to the inner walls of the pair of side bulkheads, and the two sides of the longitudinal U-shaped plate are welded and fixed to the forward transverse bulkhead and the aft transverse bulkhead, respectively.

2. The auxiliary structure for LNG fuel tank semi-ship drifting according to claim 1, characterized in that, The plate-type structural component includes a steel plate and a reinforcing structure welded to the back of the steel plate. The reinforcing structure includes multiple vertical ribs and multiple inclined ribs that intersect with the vertical ribs. The two ends of the vertical ribs are welded and fixed to the horizontally arranged angle steel on the two deck structures. The two ends of the inclined ribs are welded and fixed to the angle steel structures on the hull plates and inner bulkheads. The intersections of the vertical ribs and the inclined ribs are fixedly welded.

3. The auxiliary structure for semi-ship drifting of the LNG fuel tank according to claim 1, characterized in that, Multiple ribs evenly distributed along the width direction are welded to the inner sidewalls of the front transverse wall and the side wall.

4. The auxiliary structure for LNG fuel tank semi-ship drifting according to claim 1, characterized in that, The two sidewalls are reinforced with elbow plates by welding between them.

5. The auxiliary structure for semi-ship drifting of the LNG fuel tank according to claim 1, characterized in that, Multiple longitudinal reinforcing plates are welded and installed between the two sidewall panels.

6. The auxiliary structure for semi-ship drifting of the LNG fuel tank according to claim 1, characterized in that, Multiple vertical reinforcing members are welded between the front and rear transverse wall panels.

7. The auxiliary structure for semi-ship drifting of the LNG fuel tank according to claim 1, characterized in that, A reinforcing plate is welded between the bottom of the rear transverse wall panel and the deck.

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