A spent fuel storage grid square tube welding tool

Abstract

The invention relates to the technical field of nuclear fuel storage equipment, in particular to a square tube welding tool for a spent fuel storage grid. The technical solution adopted is: an outer clamping mechanism and an inner lining mechanism; Clamping seat, the notch of the fixing groove is detachably connected with a pressure plate; the lining mechanism includes several short backing plates, a long backing plate and a driving mandrel, and the short backing plates and long backing plates are equally spaced along the circumference of the driving mandrel. The long backing plate is driven to extend along the length direction of the mandrel, and the short backing plate is provided with several groups along the length direction of the driving mandrel; the circumference of the driving mandrel is evenly distributed with four drive assemblies, and the drive assembly is used for The drive backing plate moves radially along the drive mandrel. The invention can realize the dimensional accuracy control of the welded square tube and the deformation control of the welding process, solve the technical problems that the positioning accuracy and welding deformation of the thin-walled slender square tube are difficult to control in the manufacturing process, and can ensure the manufacturing accuracy of the square tube.

Description

technical field [0001] The invention relates to the technical field of nuclear fuel storage equipment, in particular to a square tube welding tool for a spent fuel storage grid. Background technique [0002] The spent fuel storage grid is an important safety equipment necessary for nuclear power. It is mainly used for temporary storage or long-term storage of irradiated and radioactive nuclear fuel assemblies discharged from the reactor. It plays a very important role in ensuring the safe operation of nuclear power. . Existing spent fuel storage grids are mainly composed of storage units, coamings, connecting plates, bottom plates and bases. The storage unit is composed of a square tube, a neutron absorbing plate and a cladding, the cladding fixes the neutron absorbing plate on the outer wall of the square tube, and is welded to the square tube in sections. The square tube is made of stainless steel plates with a thickness of about 2-5mm and a length of 4000mm, and the con...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned technical problem that the manufacturing accuracy of the square tube of the pan-fuel storage grid is difficult to control, the present invention provides a welding tool for the square tube of the spent fuel storage grid to solve the positioning accuracy and welding deformation of the thin-walled slender square tube during the manufacturing process. Difficult to control technical issues to ensure the manufacturing accuracy of square tubes

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