Assembly method of a support device of a B-type LNG ship envelope system

Abstract

The invention discloses an assembling method of a support device of a B-type LNG ship envelope system, which comprises the following steps: welding an upper support seat and an upper lateral support assembly at the bottom of a cargo tank; welding a low support seat - on that ship hull structure, and arranging an intermediate pressure wood -on the lower support seat; hoisting the entire enclosure system to a set position, and fixing the intermediate pressure-bearing wood and the upper support seat; fixing an outer layer of pressure-bearing wood in each upper transverse support assembly; fixinga lower lateral support assembly- on the outer side of the outer pressure-bearing wood to form a support device. the supporting device assembled by the method of the invention can simultaneously transmit loads in the longitudinal, transverse and vertical directions, effectively limit the movement of the liquid cargo enclosure system in the transverse, longitudinal and vertical directions, and reduce the evaporation rate of the liquid cargo. At the same time, it can reduce the number of supporting devices, reduce the temperature conduction, reduce the use of low-temperature steel hull structure, and improve the integrity of the insulation layer of the enclosure system.

Description

technical field [0001] The invention relates to the technical field of shipbuilding, in particular to a method for assembling a support device for a containment system of a B-type LNG ship. Background technique [0002] The structural material of the type B independent liquid cargo tank is 9Ni steel, and the periphery is covered with a polyurethane insulating layer. Unlike the membrane type LNG carrier, its liquid cargo tank is supported by the hull support device structure. When a ship sails at sea, affected by waves, it will produce hull motion states such as roll, pitch, and heave, and cause relative motion between the relatively independent containment system and the hull structure. Sloshing, in more serious cases, may cause damage to the containment system, damage the external insulation layer, and cause leakage of cryogenic liquid. [0003] In order to avoid the above problems, it is necessary to set up vertical support devices, anti-sway support devices, and anti-pit...

AI Technical Summary

Problems solved by technology

When a ship sails at sea, affected by waves, it will produce hull motion states such as roll, pitch, and heave, and cause relative motion between the relatively independent containment system and the hull structure. Sloshing, more serious may cause damage to the containment system, damage the external insulation layer, and cause leakage of cryogenic liquid

[0003] In order to avoid the above problems, it is necessary to set up vertical support devices, anti-sway support devices, and anti-pitch support devices on the periphery of the containment system to support the self-weight of the containment system and resist lateral and longitudinal relative movements, usually requiring a large number of supports device, which will lead to insufficient clearance between the containment system and the hull structure, increasing the difficulty of subsequent construction and maintenance

[0004] At the same time, the arrangement of the supporting device leads to poor integrity of the external insulation layer, increasing the risk of cryogenic liquid leakage

In addition, due to the low-temperature conduction of the support device, the temperature near the hull structure connected to it is relatively low, and the excessive number of support devices increases the use area of ​​low-temperature materials and the workload of construction design

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