Emergency bypass pipeline device for relay hydraulic reclamation of dredger

The utility model discloses an emergency bypass pipeline device for relay hydraulic reclamation of a dredger. The emergency bypass pipeline device is characterized in that an input pipeline is arranged in front of an underwater pump of a booster pump ship; the output pipeline is arranged behind a cabin pump of the booster pump ship; one end of the first pipeline is connected with the input pipeline, the other end of the first pipeline is connected with the output pipeline, and a dredge pump is arranged on the first pipeline; one end of the second pipeline is connected with the input pipeline, the other end of the second pipeline is connected with the output pipeline, a first valve body assembly is arranged on the second pipeline and used for opening or closing the second pipeline, and slurry sequentially flows through the input pipeline, the first pipeline and the output pipeline from front to back or sequentially flows through the input pipeline, the second pipeline and the output pipeline. When the main cut