Argon protection tool for weld joint part during zirconium material welding

The invention discloses an argon protection tool for a weld joint part during zirconium material welding, which comprises a pair of fixed plates, a pair of argon protection plates, a protective shelland a distributing net, wherein annular grooves are formed in opposite side surfaces of the fixed plates; the protective shell is in the shape of a sleeve, annular concave cavities are formed in the two ends of the protective shell, the two ends of the protective shell are just correspondingly located in the annular grooves of the pair of fixed plates respectively, the annular concave cavities andthe annular grooves in the corresponding sides form a sealed ventilation cavity, and an S-shaped cooling tube is arranged in the shell wall of the protective shell and covers the whole protective shell; an air inlet end of the cooling tube communicates with the ventilation cavity, and an air outlet end of the cooling tube communicates with the space between the protective shell and a zirconium tube; the distributing net i