Valve internal part structure for high-temperature and high-pressure-difference environment

The utility model discloses a valve internal part structure for a high temperature and high pressure difference environment, which comprises a valve seat, a labyrinth piece assembly, a sleeve assembly and a valve core assembly, the valve seat, the labyrinth piece assembly and the sleeve assembly are sequentially arranged from bottom to top, and the valve core assembly is arranged in the labyrinth piece assembly and the sleeve assembly and is in sliding connection with the labyrinth piece assembly and the sleeve assembly; the sleeve assembly comprises a main sleeve and a guide sleeve which are sequentially arranged from bottom to top, the main sleeve is provided with a flow channel window, the labyrinth piece assembly comprises a plurality of overlapped labyrinth pieces, and the labyrinth pieces are provided with labyrinth-shaped flow channels; the valve element assembly comprises a valve element and an auxiliary valve element, and a balance spring is arranged between the auxiliary valve element and the valve