Cutting device with small-range diameter-variable function of soft rock shield machine

Abstract

A cutting device with of small-range diameter-variable function of a soft rock shield machine comprises a cutter head, a cutter mounted on the cutter head, a side scraper telescoping mechanism, a hydraulic control device and a wearing limit detecting device, wherein two sides of end parts of at least one slag outlet groove of the cutter head are provided with a scraper respectively; the two side scrapers are left-and-right symmetrical according to the radial centerline of the slag outlet groove and are connected with a telescoping mechanism; the telescoping mechanism is mounted in the slag outlet groove of the cutter head and is driven by a driving cylinder in the hydraulic control device; a displacement sensor is arranged in the driving cylinder; and a wearing limit detecting head of the wearing limit detecting device is arranged on a sleeve protruding along the radius of the cutter head. Compared with the existing cutting device, the cutting device can adjust cutting diameter in a certain range, therefore, the cutting device can improve working efficiency, confirm cutting quality and confirm operator safety.

Description

Technical field [0001] The invention belongs to a cutting device in a shield machine, and particularly relates to a cutting device with a diameter-reducing function in a shield machine for soft rock construction. Background technique [0002] According to the definition of the International Society of Rock Mechanics, the so-called soft rock refers to a loose, loose, soft, and weak rock formation that has low strength, large porosity, poor cementation, is significantly affected by the cutting and weathering of structural surfaces, or contains a large amount of expansive clay minerals. Rock-like rocks are mostly mudstone, shale, siltstone and argillaceous sandstone with uniaxial compressive strength less than 25MPa, which are naturally formed complex geological media. [0003] A shield machine suitable for construction in soft rock formations is called a soft rock shield machine. The currently used cutting device in the soft rock shield machine is composed of a cutter head body and ...

AI Technical Summary

Problems solved by technology

At present, in the existing soft rock shield machines at home and abroad, the radial size determined by the cutterhead body and the side scrapers configured on it has been determined at the factory, and the side scrapers cannot be automatically adjusted according to geological conditions and engineering needs. Radial dimension, unless the operator enters the soil chamber "under pressure" to replace the side scraper to meet the requirements for different excavation dimensions

This is a method that is labor-intensive, time-consuming, costly and has potential safety hazards; in some complex geological conditions, operators cannot even enter the soil cabin and approach the cutterhead at all

This will affect the quality of the project because the diameter of the tunnel excavated by the cutter head cannot be kept constant; nor can the radial dimension of the side scraper be enlarged to ensure Engineering Quality

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