400 cubic meter high-strength steel ball tank detaching, transferring and integral assembly welding method

Abstract

The present invention relates to a method for detaching and conveying and wholly group-welding the 400m<3> high-strength spherical tank, and the method comprises the following procedures: separating the spherical tank body with the ladder platform; before cutting numbering according to the piece part of the spherical tank, and preheating in 500mm from the cutting starting point of the welding line; the preheating temperature is 100 DEG C; executing manual cutting for 200mm to the welding line starting point to be cut; adopting the semiautomatic welding cutter to the part to be cut on the spherical tank; manually tracking the cutting for examining; conveying to the destination with two conveying modes of vehicle conveying and water conveying; assembling and welding the detached spherical tank according to the number, firstly the preheating before the welding is executed, and then the whole heat treatment after welding is executed; lastly executing whole acoustic emission detection to the spherical tank which has been executed with conveying and group-welding. The invention successfully conveys 400m<3> high-strength spherical tank to the destination, settles the difficulty caused in the wholly conveying of the large-scale spherical tank and the technical problem in group-welding and installing after detaching, and the service lifetime of the spherical tank is prolonged.

Description

technical field [0001] The invention belongs to the technical field of welding engineering, in particular to a 400m 3 The method of dismantling and relocating high-strength steel spherical tanks as a whole. Background technique [0002] Baosteel Group Shanghai Pudong Iron and Steel Co., Ltd. 4 sets 400m 3 The spherical tank needs to be disassembled and relocated to Luojing Pujiang Plant for reassembly due to site selection and reconstruction for the World Expo. Two of the spherical tanks are 07MnCrMoVR materials produced by domestic Wuhan Iron and Steel. The relevant technical parameters of the spherical tanks are shown in Table 1.1. The material of the spherical tanks is low-alloy high-strength steel, which is a quenched and tempered steel type. The main reason is to add a certain amount of alloy elements to the steel. The strength of the material is improved by alloy precipitation. The thickness is as high as 38mm. Since the on-site cutting will be carried out this time...

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a 400m 3 The method of dismantling and relocating high-strength steel spherical tanks to solve the difficulties caused by the overall relocation of large spherical tanks and the technical problems of reassembling, welding and installing after dismantling

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