Inert gas caching device for preventing high temperature oxidation

An inert gas buffer for preventing high-temperature oxidation comprises a press head with an external thread arranged at an inlet hole and connected with an inlet pipe, an inlet pipe joint fixed at the inlet hole of a device and having a butt head with an internal thread matched with the external thread of the press head, a truncated cone below the external thread of the press head, and a truncated cone cylinder matched with the truncated cone of the press head and arranged below the internal thread of the butt head, wherein the inlet pipe is connected with the press head in such a manner that the pipe wall of the inlet pipe in the mouth expanded position is sandwiched by the truncated cone of the press head and the truncated cone cylinder wall of the butt head by rotating the press head. A joint having an internal thread hole and fixed at the inlet hole of a seal cover, and an outlet joint with an external thread matched with the internal thread of the joint and a bolt with a via-hole are arranged at an outl