Pipe replacing and slurry discharging device for slurry shield and slurry discharging mode

Abstract

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.

Description

technical field [0001] The invention relates to the field of mud-water shield machines for tunnel construction, in particular to a mud-water shield waste slurry discharge system. Background technique [0002] At present, with a large number of tunnel constructions at home and abroad, the shield machine has become the first choice. With its excellent pressure control performance, the slurry shield is widely used in tunnel projects that cross rivers, seas, and have high requirements for settlement. During mud-water shield construction, the muck is transported out through the mud pipeline by the mud pump. The mud pipeline needs to be extended every time a certain distance is excavated. When extending, the mud pipe needs to be disconnected. The mud discharge in the mud pipe is a problem that needs to be solved. question. [0003] The conventional waste slurry discharge device is to discharge the mud in the tunnel mud pipe to the sewage tank below the extension system, and then ...

AI Technical Summary

Problems solved by technology

The disadvantage of this device is that the discharge of the slurry from the mud pipe is slow and the waiting time is long. The operator always starts to change the pipe before the slurry is completely discharged, and the mud is directly discharged into the tunnel; in addition, the mud extension system The sewage tank below is limited by space, resulting in insufficient slurry storage volume. In addition, it is difficult to completely match the slurry pumping speed of the sewage pump and the slurry discharge speed of the mud pipe, resulting in the slurry overflowing from the sewage tank or pumping out

It is difficult to achieve zero discharge of slurry by using this conventional slurry discharge device, which has a great impact on the cleaning of the tunnel, and at the same time causes waste of bentonite slurry and increases construction costs

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