Automatic drainage device of heat supply pipeline

The utility model discloses an automatic water drainage device of a heat supply pipeline, which comprises a water drainage tank, an end cover, a water level assembly, a water inlet assembly, a floating block, a pull wire, a water drainage assembly, a first water drainage pipe, a water drainage valve, a second water drainage pipe and support legs, a water level assembly is arranged in the center ofthe end face of the end cover, a water inlet assembly is arranged on the end face of the top of one side of the water drainage tank, a first water drainage pipe is inserted into the end face of the bottom of one side of the water drainage tank, a water drainage valve is connected to one end of the first water drainage pipe, and a floating block is arranged in the water drainage tank. The bottom of the floating block is connected with a pull wire; the automatic water draining device of the heat supply pipeline is simple in structure; during use, water scales in the heat supply pipeline can beeffectively filtered out,