1200mw Class Nuclear Power Half-speed Turbo Generator Assembly and Welding Process for Outlet Boxes

Abstract

The invention relates to an assembling and welding technique of a nuclear-power turbo generator outlet box made of 06Cr19Ni10. An end socket is made of an austenitic stainless steel plate 06Cr19Ni10 which is molded through hot pressing by a press machine. Molding margins are removed by a plasma cutting machine, and cutting surfaces are processed by a machine tool. A shell is made of an austenitic stainless steel plate 06Cr19Ni10, the plasma cutting machine blanks, and 10mm molding margins are reserved in a molding direction. The shell is molded through rolling by a plate roller at a room temperature, and the shape of the shell is fixed through rib pulling after molding of the shell. The end socket and the shell are assembled and welded. A wire outlet cylinder and a flange plate are assembled and welded individually. Assembling and welding of a baseplate are completed according to air seal requirements, and the baseplate is planished after being welded and is subjected to PT flaw detection. The baseplate is individually assembled and welded with a vertical plate and a rib plate, and welding is performed according to the air seal requirements. The baseplate is subjected to shape modification by the press machine. After welding, all weld seams are ensured to have no penetrability defects and pass water pressure tests, air pressure tests and PT flaw detection.

Description

technical field [0001] The invention relates to a process method for assembling and welding an outlet box for a nuclear half-speed turbo generator whose material is 06Cr19Ni10. Background technique [0002] The mega-kilowatt-level nuclear power turbogenerator is a newly developed product in China. Compared with the traditional outlet box, the structure is extremely complex, with many ribs, small and thin, many space positions, and narrow operating space. The traditional assembly scheme is not suitable It can meet the precision requirements of millions of nuclear power products. Contents of the invention [0003] The invention is a manufacturing process method for ensuring the dimensional accuracy of an outlet box of a nuclear power steam turbine generator, and the invention relates to thermoforming and plasma cutting technologies. The technical scheme of the present invention is: (1) blanking of the head: the material of the head is made of austenitic stainless steel plat...

AI Technical Summary

Problems solved by technology

[0002] The mega-kilowatt-level nuclear power turbogenerator is a newly developed product in China. Compared with the traditional outlet box, the structure is extremely complex, with many ribs, small and thin, many space positions, and narrow operating space. The traditional assembly scheme is not suitable Can meet the precision requirements of millions of nuclear power products

Images