Novel multi-stage overflowing valve

The utility model discloses a novel multi-stage overflowing valve. The novel multi-stage overflowing valve comprises a main stage and a pilot stage; the main stage comprises a main overflowing valve; the pilot stage comprises a reversing valve and a plurality of overflowing valve; an oil port of a control cavity of the main overflowing valve is connected to the reversing valve and is selectively connected to one of the overflowing valves through the reversing valve, wherein the one of the overflowing valves is used as the pilot overflowing valve of the main stage; oil returning ports of the plurality of overflowing valves are connected to an oil returning port T of the main overflowing valve. According to the novel multi-stage overflowing valve, the main overflowing valve correspondingly selects an overflowing valve II, an overflowing valve III and an overflowing valve I as the pilot overflowing valves according to three working stations, namely, the left station, the middle station and the right station of the reversing valve; the three overflowing valves are of different setting pressures, and thereby, the multi-stage pressure control selection can be realized; the multi-stage pressure control selection is realized with one reversing valve; the novel multi-stage overflowing valve is compact in structure, small in cost and high in performance; the whole processing performance is high, the processing difficulty is small, mass production applies, and the quality is stable and reliable.