Sealing device of small punch lasting creep testing machine

The utility model discloses a sealing device for a small punch lasting creep testing machine, which relates to the technical field of creep testing machines and comprises a high-temperature box, the high-temperature box is mounted on the inner wall of a rack, an upper pressure plate matched with the high-temperature box is fixedly mounted at the top of the high-temperature box, and a corrugated pipe matched with the high-temperature box is in threaded connection with the top of the upper pressure plate. A first sealing ring matched with the high-temperature box is fixedly installed on the inner wall of the upper pressing disc, and a second sealing ring matched with the upper pressing disc is fixedly connected to the inner wall of the bottom of the corrugated pipe. According to the corrugated pipe, the first sealing ring and the second sealing ring are used in cooperation, the high-temperature-resistant sealing ring is adopted, and meanwhile the corrugated pipe is used in cooperation with the cooling pipe, so