Stable supporting device of hard rock tunnel boring machine

A technology of hard rock roadheader and stable support, applied in mining equipment, earthwork drilling, tunnels, etc., can solve the problems of unfavorable driving attitude control, increase the flexibility of the shield body, and expand the tool changing space, and improve the driving accuracy. and step change efficiency, the overall disassembly and maintenance is convenient, and the effect of ensuring the overall strength

Active Publication Date: 2016-10-26
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Stable supporting device of hard rock tunnel boring machine
  • Stable supporting device of hard rock tunnel boring machine
  • Stable supporting device of hard rock tunnel boring machine

Examples

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Embodiment Construction

[0020] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] see Figure 1-Figure 3 , a stable support device for a hard rock roadheader, including two support units 2 symmetrically embedded on both sides of the lower part of the front shield 1 of the roadheader, the angle between the two support units at the lower part of the front shield is α, then 0° <α≤180°, the support unit 2 includes a guide jacket 3 fixedly connected with the front shield, a stable support cylinder 4 arranged in the guide jacket 3, and a shoe plate 5 fixedly connected with the piston rod of the stable support cylinder 4 , the guide sleeve is provided with step-shaped shaft hole 1 6 and shaft hole 2 7 along the axial direction, and the platform between the front end of the cylinder body of the stable support cylinder 4 and shaft hole 1 6 and shaft hole 2 7 The shoulder 8 is matched and fitted tightly, and th...

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Abstract

The invention belongs to the technical field of tunnel boring machines. A stable supporting device of a hard rock tunnel boring machine comprises two supporting units symmetrically embedded in two sides of the lower portion of a front shield of the tunnel boring machine. Each supporting unit comprises a guide outer sleeve fixedly connected with the front shield, a stable supporting oil cylinder arranged inside the guide outer sleeve, and a shoe plank fixedly connected with a piston rod of the stable supporting oil cylinder, wherein a step-shaped shaft hole I and a step-shaped shaft hole II are formed in the guide outer sleeve in the axial direction; the front end of a cylinder body of the stable supporting oil cylinder is matched with and attached to a circular bead between the shaft hole I and the shaft hole II in an abutting mode; and a rear pressing plate fixedly connected with the guide outer sleeve is arranged at the rear end of the cylinder body of the stable supporting oil cylinder. The overall structural design of the stable supporting device of the hard rock tunnel boring machine guarantees the step change stability of the tunnel boring machine and the replacement efficiency of side hobs; and meanwhile for the structural design of the supporting units, the overall strength of the front shield is guaranteed, and the whole front shield is convenient to dismount, mount and maintain.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/08
CPCE21D9/08
Inventor 李龙飞宁向可张玉锋陈威明张世展张宁川
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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