Water flow gas insulation device

The invention discloses a water flow gas insulation device which comprises a gas insulation film, a floating type liquid level controller, a supporting rod, a driving assembly and a support. The lower end of the floating type liquid level controller is connected with the gas isolating film; the supporting rod is connected with the upper end of the floating type liquid level controller; the driving assembly is connected with the supporting rod; the support is located above water flow, and the driving assembly is located on the support. According to the application, the air separation film is arranged, so that the air separation film always floats and is attached to the water surface, and water flowing through the film is ensured not to be aerated; a floating liquid level controller is arranged, so that it is further guaranteed that the gas insulation film is attached to the water surface; and by arranging the supporting rod and the driving assembly, the gas insulation film can be pulled, and therefore the devi