Air supply structure for pressure maintaining system and earth pressure balance shield tunneling machine

Abstract

The invention discloses an air supply structure for a pressure maintaining system and an earth pressure balance shield tunneling machine. The air supply structure for the pressure maintaining system comprises an air source, a first pipeline and a second pipeline, the first pipeline is provided with a first input end and a first output end, the first input end communicates with the air source, the first output end is used for outputting high-pressure air, the second pipeline is provided with a second input end and a second output end, the second input end communicates with the first pipeline and located between the first input end and the first output end, or the second input end communicates with the gas source, the second output end is used for outputting high-pressure gas, the diameter of the second pipeline is smaller than that of the first pipeline, a second pipeline is additionally arranged on the basis of the first pipeline, and the second pipeline can be led out from the first pipeline, due to the fact that the diameter of the second pipeline is smaller than that of the first pipeline, the air pressure in the air supply structure is larger under the condition of the same air inflow, the possibility of pipeline clogging is reduced, and the air supply stability of the pressure maintaining system is improved.

Description

technical field [0001] The invention relates to the technical field of shield machines, in particular to an air supply structure for a pressure maintaining system and an earth pressure balance shield machine. Background technique [0002] Shield machine, full name shield tunnel boring machine, is a special construction machine for tunnel boring. The shield tunneling machine integrates optical, mechanical, electrical, hydraulic, sensing, and information technologies. It has the functions of excavating and cutting soil, conveying soil muck, assembling tunnel lining, and measuring and guiding deviation correction. Tailor-made” design and manufacture, shield boring machines have been widely used in tunnel projects such as subways, railways, highways, municipalities, and hydropower. [0003] During the tunneling process of the shield machine, due to the influence of factors such as stratum geology, groundwater level, and tunnel depth, problems such as abnormal tunneling paramete...

AI Technical Summary

Problems solved by technology

However, since the upper half of the soil tank is full of mixed suspended matter of air, water, and mud, under the agitation of the cutter head, these mixed suspended matters gradually precipitate and cement in the air supply pipeline of the pressure holding system, which is easy to cause pipeline failure. Blockage, and even cause the air supply pipeline of the entire pressure holding system to be polluted and damage the equipment, burying many hidden dangers for the tunneling in the air-assisted mode

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