Novel argon blowing nozzle and dead-corner-free argon blowing nozzle

The utility model discloses a novel argon blowing water gap which comprises a water gap body, a protective shell is arranged outside the position, close to the top, of the water gap body, an inner flanging covering the top of the water gap body is arranged on the upper portion of the protective shell, an argon blowing nozzle is arranged on the protective shell, an argon chamber is formed between the protective shell and the water gap body, and the argon blowing nozzle is located at the argon chamber. The bottom of the argon chamber is sealed, a plurality of argon blowing grooves are formed in the top of the nozzle body and communicated with the argon chamber, a step is arranged on the inner ring of the top of the nozzle body, and a slope is arranged on the outer side of the step. And a gap is formed between the step and the inner flanging. The utility model further discloses the dead-corner-free argon blowing nozzle. The step is arranged at the inner ring of the top of the nozzle, so that argon flow is upward