Flexible membrane sealed gas storage tank
The shape is cylindrical and similar to a tank. A spherical piston is provided in the tank. A sealing film is attached around the piston, and the other end of the film is connected to the inside of the tank wall. In this way, a closed space is formed under the piston, and when the piston moves up and down, the sealing film is rolled up and down. A sleeve-type guard rail made of a spiral corrugated plate is attached to the outer periphery of the piston to prevent lateral deformation of the flexible film. A balancing device is provided on the tank to automatically correct the tilt of the piston.