Mud water circulation and stone crushing system for shield tunneling machine

Abstract

The invention provides a mud water circulation and stone crushing system for a shield tunneling machine. The system comprises a mud incoming pipe, an air cushion bin, a discharge pipe, a mud line crusher, a mud discharge pump and a mud discharge pipe which are connected in series successively. The discharge pipe is used for conveying mud and gravels from the air cushion bin to the mud line crusher; the mud line crusher crushes the gravels from the air cushion bin; the mud line crusher is a mud fluid closed jaw crusher comprising a seal pad, a frame and a moving jaw assembly and having an interior sealable pressure up to above 0.5Mpa. The system is better than a hydraulic jaw crusher in the air cushion bin of the shield tunneling machine in terms of crushing capacity, service life and reliability; the problems that an existing shield tunneling machine experiences delayed discharge and pipe jamming in water-rich sand cobble are solved; by mounting the system on a trailer, personnel needs to enter the bin with pressure for maintenance fewer times, application cost and construction risk of the shield tunneling machine are decreased, and geological adaptability and tunneling efficiency of the shield tunneling machine are improved.

Description

technical field [0001] The invention belongs to the technical field of tunneling machinery, and in particular relates to a shield machine mud-water circulation and mud pipeline crushing system. Background technique [0002] From the front end of the excavation position to the rear end of the shield machine, it consists of an excavation cabin containing a cutter head, an air cushion cabin and a trailer. The main purpose of the air cushion cabin is to balance and stabilize the excavation surface. At present, in the process of tunnel excavation by the shield machine in the water-rich sand and pebble stratum using the mud-water balance method, it is necessary to remove the muck through the mud-water circulation system and maintain the stability of the excavation surface; at this time, the shield machine dregs method is: The muck and pebbles after disc cutting and the mud injected from outside the tunnel are mixed in the excavation cabin to form a fluid that enters the air cushio...

AI Technical Summary

Problems solved by technology

When the shield machine is constructing tunnels in the water-rich strata with high content, high hardness, and large particle size pebbles in southwest, northwest, and north China, the crushing speed of the hydraulic jaw crusher in the air cushion cabin is only four per minute. times, and often damaged under harsh working conditions, it is impossible to quickly crush the pebbles with large flow and large particle size in the air cushion cabin to the conveying range of the slurry pump, and it is very easy for the shield machine to have pebbles in the air cushion cabin and muddy water Faults such as the blockage of the slurry outlet pipeline of the circulation system and the damage of the slurry discharge pump caused the shield machine to be shut down for maintenance for a long time, which greatly limited its excavation ability.

[0003] Therefore, this field needs to develop a kind of new shield machine mud-water circulation and crushing system to overcome the problem that the crushing capacity of the hydraulic jaw crusher in the above-mentioned air cushion cabin is too low

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