Replaceable shield tunneling machine cutterhead center rotary joint in tunnel and maintenance method

Abstract

The invention discloses a replaceable shield tunneling machine cutterhead center rotary joint in a tunnel. The rotary joint comprises a housing, and a central rotating shaft is arranged in the housing; a connector is arranged at the end part of the central rotating shaft; the connector is connected with a cutterhead, a one-way transition plate is arranged between the connector and the cutterhead,a plurality of first bolt holes and second bolt holes are evenly formed in the periphery of the edge of the one-way transition plate, a plurality of one-way valve embedding holes and hydraulic oil holes are formed in the one-way transition plate, one-way valves are arranged in the one-way valve embedding holes, and sealing grooves are formed in the peripheries of the one-way valve embedding holesand the hydraulic oil holes. According to actual conditions, when a damaged central rotary joint needs to be disassembled, pressure in a soil bin is prevented from being suddenly changed, and major safety accidents are avoided. Spare parts can be replaced in time, the consumption of construction materials is reduced, the integrity rate and the utilization rate of equipment are improved, the downtime is shortened, and the production cost is reduced. Compared with the mode that the one-way valve is directly installed on the cutterhead, the joint is convenient to disassemble and check, and the on-way valve is convenient to maintain and replace.

Description

Technical field: [0001] The present application relates to the field of shield machine technology, in particular to a replaceable center rotary joint of a shield machine cutterhead in a tunnel and a maintenance method. Background technique: [0002] With the massive construction of subway projects at home and abroad, shield machines are used by more and more projects. As an important part of the shield machine, the rotary joint of the cutterhead center plays an important role in actual construction. The central rotary joint of the cutter head is composed of a central rotary shaft, a casing, a bearing and a seal. The central rotary shaft is connected with the cutter head and rotates together with the cutter head. In the front soil bin, the filling pipe for adding the muck soil improver and the hydraulic control pipe for the cutterhead profiling knife are connected with the external pipeline and other components through the pipe joint on the casing. [0003] The failure of t...

AI Technical Summary

Problems solved by technology

There is only a cross-shaped rubber plate with a central opening installed on the cutter head panel to block the inner pipeline of the central rotary joint and the soil bin. Disconnecting the external pipeline and removing the central rotary joint will cause a sudden change in the pressure in the soil bin and cause ground subsidence For accidents such as accidents such as flooding and permeation, ground reinforcement must be carried out, which consumes a lot of manpower and material resources and increases construction costs.

Images