Shield tunneling machine, scouring device and slurry circulation system

Abstract

The invention discloses a shield tunneling machine, a scouring device and a slurry circulation system.The slurry circulation system comprises a slurry inlet pipeline and a slurry inlet pump, the slurry inlet pipeline is connected with a left bentonite nozzle pipeline and a right bentonite nozzle pipeline, and the left bentonite nozzle pipeline and the right bentonite nozzle pipeline are connected with a left bentonite nozzle and a right bentonite nozzle respectively; the air cushion is connected into the air cushion bin; the included angle between the normal of the left bentonite nozzle and the vertical direction is smaller than the included angle between the connecting line of the center point of the outlet of the left bentonite nozzle and the center point of the bottom of the shield body and the vertical direction. The included angle between the normal of the right bentonite nozzle and the vertical direction is smaller than the included angle between the connecting line of the center point of the outlet of the right bentonite nozzle and the center point of the bottom of the shield body and the vertical direction. According to the slurry circulation system, the left bentonite nozzle and the right bentonite nozzle are used for washing the soil at the bottom of the bin at the angles deviating from the center of the bottom of the shield body, so that the slag carrying capacity and the washing effect of the system can be greatly improved, rapid slag discharging can be achieved, and blockage of a slurry discharging opening is reduced.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a shield machine, a flushing device and a mud circulation system. Background technique [0002] The scouring device of the existing conventional shield machine has low slag-carrying capacity and poor scouring effect, especially at the slurry outlet where accumulation is easy to form, resulting in blockage of the excavation chamber or air cushion chamber of the shield machine. When there is slag, it is necessary to stop the excavation and carry out the backwashing cycle of the mud pipeline. Once there is too much slag accumulated, it is necessary to manually enter the warehouse to remove the slag, which delays the normal excavation work and affects the operation efficiency. [0003] Therefore, how to avoid affecting the driving efficiency due to the low slag-carrying capacity and poor scouring effect of the scouring device of the shield machine is a technical problem...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a shield machine, a flushing device and a mud circulation system, which can solve the problems of low flushing efficiency, low slag carrying rate, and excessive accumulation of crushed stones at the bottom of the warehouse, which cause stagnant discharge of the excavation slag discharge system

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