Novel sealing structure of test pipeline

The sealing structure is a set of device capable of sealing a test pipeline in a high-temperature medium-pressure environment and is mainly used for rapidly installing and detaching the test pipeline so that the test pipeline has a good sealing structure and safety. The novel sealing structure of the test pipeline comprises a base (1), the test pipeline (2), a graphite washer (3) and a covering plate (4), wherein a groove and a U-shaped groove which are intersected are formed in the upper surface of the base (1), the test pipeline (2) is arranged in the U-shaped groove, the graphite washer (3) is arranged in the groove, a boss matched with the groove is arranged on the lower surface of the covering plate (4), the covering plate (4) and the base (1) are connected through a bolt, and the graphite washer (3) is squeezed and deformed to seal the contact surface between the groove and the U-shaped groove of the test pipeline (2) and fill the intervals in the sealing position.