Spent fuel storage grillwork square tube welding tool

Abstract

The invention relates to the technical field of nuclear fuel storage equipment, in particular to a spent fuel storage grillwork square tube welding tool. According to the technical scheme, the spent fuel storage grillwork square tube welding tool comprises an outer clamping mechanism and a lining mechanism. The outer clamping mechanism comprises a clamping base provided with a fixing groove, wherein an opening of the fixing groove is detachably connected with pressing plates. The lining mechanism comprises a plurality of short base plates, a long base plate and a driving mandrel, wherein the short base plates and the long base plate are evenly distributed in the circumferential direction of the driving mandrel, the long base plate is driven to extend in the length direction of the mandrel,and the plurality of sets of short base plates are arranged in the length direction of the driving mandrel. Four driving assemblies are evenly distributed on the circumference of the driving mandreland used for driving the base plates to move in the radial direction of the driving mandrel. Dimension precision control and welding process deformation control of welded square pipes can be achieved,the technical problem that the positioning precision and welding deformation are difficult to control in the manufacturing process of the thin-wall long and thin square pipes is solved, and the manufacturing precision of the square pipes can be guaranteed.

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...

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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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