Common-bottom structure storage tank body assembling and welding process and overturning tool

Abstract

The invention provides a common-bottom structure storage tank body assembling and welding process which comprises the following steps that (1) a front bottom assembling unit and a rear bottom assembling unit are welded; (2) the common bottom of the common bottom storage tank is overturned through an overturning tool and the upper frame is fixed to the tail of the equipment bed; (3) an upper box cylinder section is welded on the upper convex side of the common bottom; (4) the lower box cylinder section is mounted to the equipment bed tail, then the common-bottom transition ring and the lower box cylinder section are welded, the rear bottom assembly is mounted to the equipment bed tail and then the rear bottom assembly and the lower box cylinder section are welded to form a storage box partsection; and (5) the storage box section is lifted to turn the course, the rear bottom assembly end of the storage box section is connected with the equipment bed head, the upper box cylinder sectionis erected to the tail of the equipment bed, the upper box cylinder section and the remaining cylinder sections are assembled and welded and then the front bottom assembly is assembled to the tail ofthe bed and the front bottom assembly is welded with the remaining cylinder sections. The overturning process of the storage tank of the common-bottom structure storage tank body assembling and welding process is simple and reliable and overturning of a large-diameter tank bottom structure is realized.

Description

technical field [0001] The invention belongs to the field of storage tanks, and in particular relates to an assembly and welding process of a storage tank with a common bottom structure and a turning tool. Background technique [0002] In order to improve structural efficiency, a core-level tank of a new generation of manned lunar launch vehicle adopts a Φ5000mm common-bottom structure storage tank scheme. , the upper box section, the front bottom and the front short shell are combined and welded. Due to the existence of the common bottom structure of the storage tank, its assembly and welding process is quite different from that of the existing new-generation launch vehicle Φ5000mm diameter structural storage tank. [0003] At present, the assembly and welding process of the existing Φ5000mm diameter storage tank is: welding of the front short shell and the front bottom→welding of the rear short shell and the rear bottom→welding of the rear bottom assembly and the intermed...

AI Technical Summary

Problems solved by technology

[0003] At present, the assembly and welding process flow of the existing Φ5000mm diameter storage tank is: welding of the front short shell and the front bottom → welding of the rear short shell and the rear bottom → welding of the rear bottom assembly and the intermediate cylinder section → welding between the intermediate cylinder sections → finally The welding of a cylinder section and the front bottom assembly adopts the first set of Φ5000mm non-standard large-scale equipment box general assembly circular seam welding system in China, but the Φ5000mm common bottom structure storage tank has a common bottom structure in the middle, resulting in a There are two cavities in the storage tank, temporarily called the upper tank and the lower tank, which make the existing process flow and assembly scheme unsuitable. First, because there is no manhole flange with a certain diameter on the common bottom structure, the entire common bottom structure is If it is completely sealed, the support tooling in the existing storage tank sealing assembly welding rod system cannot be used, and normal assembly and welding cannot be performed; secondly, due to the existence of the common bottom structure, the inside of the storage tank is affected by the convexity of the common bottom structure , the assembly and welding of the tube section in the upper box and the common bottom ring seam are greatly affected, and there is only a relatively small space inside the ring seam for assembly; finally, in the conventional assembly process, only the sealing welding is left until the end for unified sealing assembly Welding is enough, but due to the common bottom structure of the storage tank, the storage tank is divided into upper and lower tanks, and the upper and lower storage tanks need to be sealed and assembled separately, and the conventional process method cannot meet the needs

Images