Method for top lift installation of inner tank and outer tank of double-wall storage tank

Abstract

A method for top lift installation of an inner tank and an outer tank of a double-wall storage tank is used for solving the producing and installing problems of double-wall storage tank equipment. The method comprises the following construction steps: a, foundation acceptance treatment; b, outer tank bottom plate installation; c, tank bottom thermal insulating layer construction; d, inner tank bottom plate installation; e, inner tank top laying; f, inner tank first belt wall plate installation; g, outer tank top framework installation; h, inner tank top lift installation; I, other inner tank wall plate installation; j, inner tank accessory installation; k, outer tank wall plate installation; l, outer tank top plate layering; and m, test and thermal insulation construction. The method utilizes an inner tank and outer tank inverse assembling technology to simplify double-wall tank installation processes, aerial work quantity can be obviously reduced, the working efficiency is increased, the construction period is shortened, the safety of operating personnel is ensured, and the humanized construction idea is realized.

Description

technical field [0001] The invention relates to a manufacturing and installing method of engineering equipment, in particular to a construction method suitable for manufacturing and installing large and medium-sized double-wall storage tanks. Background technique [0002] As a cryogenic liquid storage device, a double-wall storage tank is composed of an inner tank for storing cryogenic liquid and an outer tank for supporting insulation materials, and an insulating structural layer is arranged between the inner and outer tanks. The inner tank and the outer tank of the double-wall storage tank are made of different metal materials. They are assembled and welded by a certain number of wall strip plates to form the inner and outer tank wall cylinders, and then the inner and outer tank wall cylinders are connected to the inner and outer tanks respectively. The bottom plate is welded, the inner tank roof with a flat ceiling structure is set on the top of the inner tank wall, and t...

AI Technical Summary

Problems solved by technology

The problems of the above method are mainly reflected in the following aspects: First, because the outer tank is constructed first, when the inner tank wall is assembled, a special circular track needs to be set on the installed outer tank roof, and the inner tank wall is suspended by manual or electric cranes. The hoisting of the plates, and the prefabricated plates of the inner tank wall need to be transported through the reserved channel of the outer tank wall, the construction process is complicated; the second is that the installation of the inner tank roof adopts high-altitude assembly or air blowing method, the construction process is cumbersome, the amount of high-altitude operations is large, and the construction period Longer; third, the inner tank assembly space is narrow, the environment is closed, and the working conditions are poor

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