Crossed back type muck modifier injection port of shield tunneling machine

Abstract

The invention discloses a crossed back type muck modifier injection port of a shield tunneling machine. The crossed back type muck modifier injection port comprises a modifier injection barrel and a nozzle. The modifier injection barrel is arranged between a cutter front panel A and a cutter rear panel B, the nozzle is arranged on the cutter front panel A, the modifier injection barrel comprises an inner barrel wall and an outer barrel wall, and the inner barrel wall is fixedly connected with the outer barrel wall by an inner and outer barrel wall connecting bolt (5). The crossed back type muck modifier injection port of the shield tunneling machine has the advantages that maintenance staffs in holes can draw the integral nozzle out from the back of a cutter to carry out dredging or replacing when a rubber mat is abraded or the modifier nozzle is blocked, and accordingly the crossed back type muck modifier injection port is convenient to maintain and simple in operation.

Description

technical field [0001] The invention belongs to the construction technology of subway tunnels, and relates to a dregs soil modifier injection port of a shield machine, which is mainly embodied in a cross-shaped back-mounted type, which is easy to disassemble and replace, and is simple and convenient to operate. Background technique [0002] The working principle of the earth pressure balance shield machine, the muck cut by the cutter head enters the soil bin through the opening on the cutter head, and the muck is stirred and improved in the soil bin to become a flow-plastic shape, and the thrust of the shield propulsion cylinder passes through the bearing The pressure partition is passed to the muck in the soil bin, and then passed to the excavation surface to balance the underground water pressure and soil pressure at the excavation surface, thereby maintaining the stability of the excavation surface. [0003] The muck improvement system is one of the most important systems...

AI Technical Summary

Problems solved by technology

[0004] If the design of the injection port of the muck modifier is unreasonable, the nozzle is easy to be blocked, and it is difficult to unblock after the clogging, resulting in the failure of the dregs modifier to be sprayed out, and the muck cut by the cutter head cannot be improved, and a series of problems will occur, affecting The life of the equipment and the progress that affects the construction of the project

[0005] If the rubber pad of the injection port of the muck improver is worn out, the maintenance personnel cannot go to the front of the cutter head to process or replace the worn rubber pad in the hole, which is equivalent to the injection port losing the function of the one-way valve. Under the action of water and soil pressure, the dregs inside are poured into the pipeline of the dregs improvement system, causing the dregs improvement system to fail to work normally

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