Box body assembling system and method of polyurethane insulation box for liquefied natural gas (LNG) ships

Abstract

The invention relates to a box body assembling system and method of a polyurethane insulation box for liquefied natural gas (LNG) ships. The box body assembling system of the polyurethane insulation box for liquefied natural gas (LNG) ships comprises a base, an X-direction positioning and correcting mechanism, a Y-direction positioning and correcting mechanism and a wood clamping-plate correctingmechanism, wherein the X-direction positioning and correcting mechanism, the Y-direction positioning and correcting mechanism and the wood clamping-plate correcting mechanism are separately arranged on the base. During assembling, the X-direction positioning and correcting mechanism and the Y-direction positioning and correcting mechanism are used for positioning and correcting the X-direction andY-direction of the polyurethane insulation box, and a wood clamping-plate is tightly pressed by the wood clamping-plate correcting mechanism. Compared with the prior art, the box assembling precisionof a plurality of modes of NO.96L03 / L03+ series enhanced polyurethane standard insulation boxes can be controlled, the assembling precision requirements under different production conditions can be met, the operation is simple and convenient, and good product quality consistency is achieved.

Description

technical field [0001] The invention belongs to the technical field of liquefied natural gas ships, and relates to a box body assembly system and method for polyurethane insulating boxes used in LNG ships. Background technique [0002] The insulation box is an important part to ensure that the liquid cargo tank in the liquid cargo containment system of a large liquefied natural gas (LNG) ship is at an ultra-low temperature of -163°C. The reinforced polyurethane standard insulation box is made of rigid polyurethane foam board It is assembled and pressed together with plywood and other components. It is the core component of the membrane-type LNG ship containment system. In the NO.96 containment system, reinforced polyurethane standard insulation boxes include L03, L03+ and other forms, and a film-type LNG ship with NO.96 containment system needs 20,000 NO.96L03+ series reinforced polyurethane standard insulation boxes; The reinforced polyurethane standard insulation box has ...

AI Technical Summary

Problems solved by technology

[0005] (1) It is difficult to effectively control the accuracy of assembly and manufacturing. For example, using manual or semi-automatic spreaders to stack glued plywood or polyurethane foam boards layer by layer, it is inevitable that there will be misalignment between layers. Once misalignment occurs, Most of them are corrected by hand or with the help of simple molds, and the production efficiency is low

[0006] (2) Manual assembly of wooden splints, poor quality stability

For the NO.96L03 / L03+ series insulation box, the four sides of the special wooden plywood (Cleat) need to be connected with polyurethane and plywood by gluing. The method of hardening is to manually hammer the wooden splint and then perform subsequent aging curing, resulting in uneven force on the splint, and the connection strength and assembly accuracy are not up to standard

[0007] (3) The process lacks flexibility

Since the assembly and fastening of wooden splints are all completed by manual operation at the assembly station, this method not only has poor quality stability, but also disturbs the overall rhythm of the entire production system due to accidental factors of manual operation, resulting in the parts to be assembled on the assembly line. backlog, seriously affecting production efficiency

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