▎ 摘　　要

NOVELTY - The flap valve has an electric heating plate (2) that is installed on the sealing cover (1). The valve seat (10) is installed at the bottom of the sealed cover. The outer surface of the sealing cover has a groove for installing the electric heating plate. The electric heating plate is embedded in the embedding groove. The groove wall is provided with a matching wire groove. One end penetrates through the outer surface of the sealing cover. The opposite sides of the embedding groove are provided with clamping unit grooves. A clamping unit is placed in the unit slot, and two clamping units are respectively placed. USE - Flap valve used with thermal insulation structure based on graphene heating. ADVANTAGE - The turning plate valve is used for actively insulating the rock bottom in the core making process, preventing the temperature of the rock core bottom from reducing, good heat preservation capability, and heat preservation coring of different depths under different working conditions. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a heat preservation structure based on heating graphene. DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the flap valve used with a thermal insulation structure based on graphene heating. Sealing cover (1) Electric heating plate (2) Rock core cylinder (4) Rock core cylinder (5) Outer cylinder (6) Central rod (7) Valve seat (10) Power supply (81) Temperature sensor (82) Temperature control chip (83) Lead (84) Rock core (100)