Improved structure of de-floating system

The utility model belongs to the technical field of spent fuel acceptance and storage and particularly relates to an improved structure of a de-floating system. The utility model aims to provide the de-floating system which can eliminate potential safety hazard in crossed work, reduces the working intensity of operators, and enables the operation of the de-floating system and the hanging operation of a portal frame to be mutually independent and not mutually influenced. The improved structure of the de-floating system comprises skimming dishes (1), a de-floating filter (2), valves (3) and a de-floating pump (5), wherein the de-floating pump (5) is connected with the de-floating filter (2) and the valves (3) through a stainless steel pipe A (4); and the skimming dishes (1) are connected with the valve (3) through a steel pipe. The improved structure of the de-floating system is characterized in that the stainless steel pipe A (4) is used for connecting the skimming dishes of an A pool, a conversion pool, a B1