Sliding type H-type piston coal gas tank and sliding type H-type piston thereof

The invention discloses a sliding type H-type piston coal gas tank and a sliding type H-type piston thereof. The sliding type H-type piston coal gas tank comprises a coal gas tank barrel, wherein a roof deck and a ventilation clerestory are arranged at the top of the coal gas tank barrel; a gas inlet is formed at the bottom of the coal gas tank barrel; the coal gas tank barrel is internally provided with a sliding type H-type piston which can slide along the inner wall; the sliding type H-type piston comprises a piston rail frame which can slide along the inner wall of the coal gas tank barrel; the inner wall of the piston rail frame is provided with a sliding type liner piston arch capable of sliding along the inner wall of the piston rail frame; the sliding type liner piston arch comprises a liner piston, a piston plate and a piston plate supporting truss; a rubber sealing film is arranged between the sliding type H-type piston and the inner wall of the coal gas tank barrel; and a liner rubber sealing film