The invention provides a
pipe replacing and
slurry discharging device used for a
slurry shield and capable of quickly discharging
slurry in a slurry
pipe without leakage and a slurry discharging mode. The
pipe replacing and slurry discharging device comprises a
sewage pump and an airtight slurry
storage tank, wherein a slurry inlet of the airtight slurry
storage tank is divided into two ways, one way is connected with a slurry inlet pipe through a slurry inlet pipe
ball valve and connected with a slurry discharging pipe through a slurry discharging pipe
ball valve after being provided with a master control
ball valve, the other way is connected with a
sewage tank through a membrane pump, and the
sewage tank is connected with the slurry inlet pipe ball valve and the slurry discharging pipe ball valve respectively through a sewage ball valve. A slurry inlet pipe control ball valve and a slurry inlet pipe
gate valve are arranged at the two ends of the slurry inlet pipe, a slurry inlet pipe
breathing port is formed between the slurry inlet pipe control ball valve and the slurry inlet pipe
gate valve, a slurry discharging pipe control ball valve and a slurry discharging pipe
gate valve are arranged at the two ends of the slurry discharging pipe, and a slurry discharging pipe
breathing port is formed between the slurry discharging pipe control ball valve and the slurry discharging pipe gate valve. The pipe replacing and slurry discharging device used for the slurry shield is high in slurry discharging speed, can be basically free of leakage, ensures tunnel cleaning, decreases the using amount of a slurrying agent and facilitates
environmental protection, and the construction cost is reduced.