Same-jig construction method for LNG ship liquid dome deck sections

Abstract

The invention discloses a same-jig construction method for LNG ship liquid dome deck sections. The same-jig construction method comprises the steps of 1arranging a trunk deck jig frame; 2 constructinga trunk deck tapping middle assemblage and a trunk deck small middle assemblage on the same jig; 3 arranging an inner deck jig frame ; 4 assembling and constructing an inner deck hole; 5 constructinga liquid dome perforated deck section by section; 6 splicing and machining the stainless steel inner deck; 7 constructing small sections of the liquid dome; and step 8 combining the liquid dome perforated deck sections and the small sections of the liquid dome to form LNG ship liquid dome deck sections. According to the method, a same-jig construction scheme is adopted, a reasonable welding process is developed, the reinforcing tool is arranged at the punching position of the liquid dome deck sections, the matching precision of the liquid dome perforated deck and the small sections of the liquid dome is effectively guaranteed, and rapid carrying of the small sections of the liquid dome in the follow-up dock stage is facilitated.

Description

technical field [0001] The invention belongs to the technical field of ship building, and in particular relates to a method for building a segmented liquid dome deck of an LNG ship in the same body. Background technique [0002] LNG carrier is a special ship for transporting liquefied gas at a low temperature of minus 162 degrees Celsius. It is very difficult to construct the sub-sections of the deck, and the construction quality of the sub-sections directly determines the installation accuracy and efficiency of the insulation box, pump tower and other structures. The effective construction process cannot well control the construction accuracy of the inner deck and the opening accuracy of the pump tower pipe, resulting in a lot of manpower and material resources invested in the subsequent correction process. Conventional construction schemes have the following deficiencies: [0003] First, the setting of segmented tire frames for the tank deck of LNG ships is unreasonable....

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Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the present invention provides a method for constructing the LNG ship's liquid dome deck segments in the same body. The section of the liquid dome deck of the ship lacks scientific construction technology of the same tire, and the unreasonable opening process of the tube hole of the section of the liquid dome deck of the LNG ship causes large deformation of the inner deck, and the precision of the opening is not high, which affects the installation of the containment system of the LNG ship and pump tower installation quality and installation efficiency

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