U-shaped gas insulation and drainage equipment

The embodiment of the invention relates to the technical field of water supply and drainage, in particular to U-shaped gas insulation and drainage equipment. The U-shaped gas barrier comprises a U-shaped pipeline, a water injection hole is formed in the side wall of the U-shaped pipeline, and the water injection hole is located in the bottom of a U-shaped groove formed by the U-shaped pipeline; a water tank which is provided with a water storage tank, a water inlet and a water outlet, wherein the water inlet and the water outlet are communicated with the water storage tank, and the water outlet is communicated with the water injection hole; an electromagnetic valve switch which is arranged at the water inlet and used for closing or opening the water inlet; a float switch that is arranged in the water storage tank and used for detecting the water level of the water storage tank; a controller which is connected with the electromagnetic valve switch and the floating ball switch. The controller is used for contro