Welding device for large weak-rigidity thin-wall component of nuclear reactor coolant pump

Abstract

The invention relates to a welding device for a large weak-rigidity thin-wall component of a nuclear reactor coolant pump. A lathe bed workbench (2) is arranged at the upper part of a rigid lathe bed (1), a cross beam (4) is fixed on the lathe bed workbench through a stand column (3), a track (16) is arranged on the cross beam (4) and is of a rack structure, a gear of a walking trolley (5) is meshed with a rack, a laser head (6) and a wire feeding assembly (7) are assembled on the walking trolley (5) through bolts, a welding seam tracker (8) is assembled on the laser head (6) through an L-shaped support (17), a mandrel (9) is assembled on the rigid lathe bed (1) through bolts, and a movable trolley (10) is located below the mandrel (9). By means of the device provided by the invention, manpower input can be reduced, human errors are avoided, and the welding quality problem easily caused by manual operation is avoided; and at present, the device is put into the product manufacturing process, the use process is good, the income effect is remarkable, and the manufacturing quality of large weak-rigidity thin-wall components is effectively guaranteed while the operation difficulty is reduced.

Description

Technical field: [0001] The invention relates to a welding device for a large weak rigidity thin-walled member of a nuclear reactor coolant pump. Background technique: [0002] The nuclear reactor coolant pump is one of the key equipment of the nuclear island of the nuclear power plant. Its function is to transfer the heat generated in the reactor to the steam generator, thereby generating steam to drive the steam turbine to do work. The reactor coolant pump is the only rotating mechanical device in the reactor cooling system, so the reliability of the nuclear reactor coolant pump is the key to the safe and stable operation of the nuclear power plant. The nuclear reactor coolant pump involves welded parts of various thicknesses and structures. Among them, the welding of large weak-rigidity thin-walled components is the most difficult. In addition to the difficulty of developing process parameters, it is also necessary to have a suitable welding device. Another challenge. L...

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Problems solved by technology

In addition, the characteristics of long-dimension welds of large components further exacerbate the welding difficulties of thin-walled components

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