Stable support device for hard rock roadheader

Abstract

The invention belongs to the technical field of boring machines. A stable support device for a hard rock roadheader, comprising two support units symmetrically embedded on both sides of the lower part of the front shield of the roadheader, the support unit includes a guide jacket fixedly connected with the front shield, a stable The supporting oil cylinder and the shoe plate fixedly connected with the piston rod of the stabilizing supporting oil cylinder, the step-shaped shaft hole 1 and the shaft hole 2 are arranged in the axial direction in the said guide jacket, the front end of the cylinder body of the stably supporting oil cylinder is connected with the The shoulders between the shaft hole 1 and the shaft hole 2 are fitted tightly together, and the rear end of the cylinder body of the stable support oil cylinder is provided with a rear pressure plate fixedly connected with the guide jacket. The overall structural design of the application ensures the stability of step change of the TBM and the efficiency of side hob replacement. At the same time, the structural design of the support unit ensures the overall strength of the front shield and facilitates overall disassembly and maintenance.

Description

technical field [0001] The invention belongs to the technical field of roadheaders, and in particular relates to a stable support device for a hard rock roadheader. Background technique [0002] The main body of the double-shield hard rock tunnel boring machine (TBM) mainly includes cutter head, front shield, telescopic shield (telescopic outer shield and telescopic inner shield), support shield, tail shield, etc. It has two working modes, single shield Working mode and double shield working mode. When the integrity of the surrounding rock is relatively good, use the support shield boots to brace the cave wall to provide the excavation reaction force, and the cutterhead excavation and segment assembly can be carried out at the same time; when passing through the relatively fragmented surrounding rock, the single shield mode is adopted , which can reduce the risk of card shield. Therefore, the double-shield TBM can realize rapid excavation under different geological conditi...

AI Technical Summary

Problems solved by technology

The gap between the shield body and the excavation wall increases sequentially from the front to the back, and the flexibility of the shield body increases during the step change process, which is not conducive to the control of the tunneling attitude

At the same time, after the tool wear reaches a certain value, when replacing the side hob, it is necessary to manually excavate the rock and expand the tool changing space

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