Liquefied natural gas tanker container nesting method

Abstract

The invention discloses a package packing method of a liquefied natural gas tanker container. An inner tank is set up on the positions of assembly process pipes on the two ends through special supports, the lower section of each support is provided with four concave wheels which are engaged with outer cylinder guide rails, two support pipe which are engaged with the assembly process pipes on the two ends of the inner tank are arranged on the upper end of the support, the support is arranged on the outer cylinder guide rails whose heights are decided by the center shaft of the inner tank overlapping the center shaft of the outer cylinder. The inner tank and the support are pushed by a truss hoist and other devices on the far end from the inner tank to the outer cylinder, and the inner tank is slowly sleeved in the outer cylinder to the assembly position. The invention can precise the center positioning of the inner tank through adopting double supports, and the axialities of the inner tank and the outer cylinder are high, which are specially used to pack assembly under the condition that the distance between the outer surface of the inner tank and the inner surface of an outer cylinder is smaller. The double support enables the inward swallowing process of the inner tank much smoother, which avoids that the inner tank skews to hit the outer cylinder result in damaging an insulation layer in the packing process, and largely reduces the packing operation time, and the safety is much higher.

Description

Technical field: [0001] The invention relates to a method for assembling an inner and outer tank body of a double-metal wall low-temperature liquid storage tank used in the machinery manufacturing industry, in particular to a method for fitting a liquefied natural gas tanker storage tank. Background technique: [0002] At present, LNG storage tank manufacturers do not have a unified packaging process, and each manufacturer designs a packaging scheme according to its own technical conditions. Generally, one end is supported by a bracket, the other end is lifted, and the packaging method is pushed along the guide rail. With the development of technology, the effective loading capacity of the storage tank is required to be increased as much as possible while the external dimensions remain unchanged, so the distance between the inner and outer tanks is reduced accordingly, which brings higher technical requirements for the packaged construction. In actual production, due to the ...

AI Technical Summary

Problems solved by technology

In actual production, due to the imperfect package plan, it often results in a long construction time for the package, or damages the heat insulation layer of the inner tank

If the heat insulation layer of the inner tank is exposed to the atmosphere for too long, it will be difficult to evacuate later, which will affect the insulation performance; or the packaging process is unreasonable, causing collision damage to the insulation layer of the inner tank; or the positioning accuracy of the suit is not enough, so that the installation of the inner support difficulty

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