Device for directly discharging shield tail sewage of slurry shield tunneling machine to slurry discharging pipeline

The utility model provides a device for directly discharging shield tail sewage of a slurry shield machine to a slurry discharging pipeline, which is characterized in that an inlet end of a diaphragm pump is used for connecting a shield body sewage discharging port, an outlet end of the diaphragm pump outputs two ports through a first one-way valve, the first port is communicated with a first sewage discharging pipeline, and the second port is communicated with a second sewage discharging pipeline; the second interface is communicated with the sewage tank and is provided with a second switching valve; the first blow-off pipeline is communicated with a built-in slurry discharge pipeline of the tail trolley, a third one-way valve and a first switching valve are sequentially arranged at the front end of the first blow-off pipeline, and a second one-way valve and a first ball valve are sequentially arranged on the built-in slurry discharge pipeline of the tail trolley; an outlet of the sewage tank is connected wi