Large steel tube technology and equipment

Abstract

The invention aims to provide a new large steel tube manufacturing and installation technology and equipment. A unit structure taking tiles as the basis is adopted to transport large space steel tubes as well as install and weld on spot; installing and welding equipment adopts a steel tube positioning method and moves in the mode of flexible boosting or winching lifting of an axial cylinder; steel tube installation girth welding adopts rotation driving to drive an automatic welding device to finish the automatic welding of a space girth; mechanical operation can be realized when the steel tube is horizontal or is in an inclined, upper elbow or lower elbow state to form a set of large steel tube engineering center capable of multi-angle omnibearing moving. The invention replaces a traditional large space steel tube construction technology, is favorable for improving engineering safety, quality and efficiency, protects environment, lowers the integrated manufacturing cost of the steel tube and is especially suitable for large intake steel tube engineering in the cavity or dam of hydropower stations.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, and relates to a manufacturing and installation process and equipment for large-scale steel pipes in hydropower stations, which are used for on-site assembly and welding of large-scale steel pipes. technical background [0002] In order to solve the technical problems of large-scale steel pipe manufacturing and installation under specific environmental conditions, the design of large-scale steel pipe mechanization process and steel pipe trolley came into being, which can complete the on-site manufacturing and installation of large or super large steel pipes in a limited construction space. Chinese patent application 200510020396.7 proposes a large-scale steel pipe automatic manufacturing process, and at the same time, Chinese patents CN2917917 (application number 200520035203.0) and CN1803567A (application number 200610020101.0) propose corresponding mechanisms to realize the mechanization ...

AI Technical Summary

Problems solved by technology

Using traditional technology and equipment to weld bent pipes, vertical pipes and inclined pipes is still only assembled and welded in the factory, and transported to the installation site. This will form engineering constraints for the planning and construction of the production site, transportation roads, and hoisting equipment. For alpine valleys For steel pipe projects with large areas or large sizes, the technical difficulty will increase accordingly, and the project cost will inevitably increase, and its construction safety control is very difficult. On the one hand, there are risks in the transportation, turning and installation of large steel pipes. It is the systemic risk caused by the intersection between steel pipe construction and other simultaneous works. At the same time, when the hoisting equipment and site resources are limited, for example, during the construction of some dams, the construction of water diversion steel pipes will affect the construction period of the dam or even the entire project. will be direct

If the above-mentioned patented technology is adopted, although the transportation size of steel pipes can be reduced in some places, there are still great safety hazards in the transportation and installation stage of inclined pipes or vertical pipes because of size and weight problems, and it is difficult to increase the construction speed of steel pipes

[0004] It can be seen that there are the following deficiencies in the large-scale space steel pipe project: 1) The degree of mechanization and specialization in manufacturing and installation is insufficient; 2) The project cost increases due to the large transportation size; Efficiency needs to be improved

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