A method for installing the insulation layer at the welding seam of an independent liquid cargo tank

Abstract

The invention provides an installation method of an insulation layer at weld joints of an independent liquid cargo tank. Multiple weld joints are arranged on outer plates of the independent liquid cargo tank. The method comprises the following steps that S1, according to the design demand, a protection cover is manufactured, the cross section of the protection cover is triangular, two supporting feet are arranged at the bottom of the protection cover, and a sunken part is formed in the portion, between the two supporting feet, of the bottom of the protection cover; 2, a bonding agent is used for pasting the two supporting feet to the outer plates of the two sides of each weld joint; S3, the insulation layer with the height equal to that of the protection cover is arranged on the outer surfaces of the outer plates. The installation method has the advantages that the sunken part is arranged at the bottom of the protection cover, a cavity is formed between the bottom of the protection cover and the sunken part, the protection cover is not in direct contact with the weld joints, and falling-off, caused by the weld joints expanding with heat and contracting with cold, of the insulationlayer can be greatly reduced; the operation safety of the liquid cargo tank is guaranteed, in addition, by adopting the protection cover with the triangular cross section, the cost of manufacturing the material can be reduced, and the production cost is reduced.

Description

technical field [0001] The invention relates to an installation method of an insulating layer at a welding seam of an independent liquid cargo tank. Background technique [0002] The liquefied gas carrier is a special ship used to transport low-temperature liquid cargo such as liquefied petroleum gas and liquefied natural gas. These liquid cargoes are loaded in the liquid cargo tank of the liquefied gas carrier. Insulation. The main purpose of the insulation layer of the cargo tank is to prevent the external heat from entering the interior of the cargo tank so as to reduce the evaporation of the cargo. [0003] For independent liquid cargo tanks, there are many butt welds arranged on its outer plates, and the traditional insulating layer installation process is to lay the insulating layer directly on the outer surfaces of the outer plates of the liquid cargo tanks and the butt welds. Due to the low temperature of the liquid cargo, thermal expansion and contraction will occ...

AI Technical Summary

Problems solved by technology

Due to the low temperature of the liquid cargo, thermal expansion and contraction will occur on the outer plate of the liquid cargo tank and the butt welds during loading and unloading, but due to the obvious deformation of the butt welds, the insulation layer laid on the butt welds is extremely Easy to fall off, seriously affecting the operation safety of liquid cargo

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