Method and apparatus for inspecting a forward end portion in a t

Details Method and apparatus for inspecting a forward end portion in a t Method and apparatus for inspecting a forward end portion in a t

1990-10-10

1992-04-21

Bagnell, David J.

Mining or in situ disintegration of hard material

Automatic control; signaling or indicating

Of tunneling apparatus having a wall temporary support

175 40, 299 33, 299 81, 405144, F21C 3522, F21D 906

Patent

active

051061635

ABSTRACT:
A system for inspecting a forward end portion in a tunneling machine including cutter bits and a chamber such as a tunnel boring machine or a shield tunneling machine. The system includes an apparatus for inspecting a forward end portion comprising at least one through hole provided on the partition wall for defining a chamber, an elongate member slidably and rotatably inserted into the through hole, an image sensor positioned at a forward end of the elongate member for observing a cutter bit or the inside of the chamber, an image display provided in the main body for displaying an image from the image sensor, and a connection for connecting the image sensor and the image display. The system also includes a method for inspecting a forward end portion comprising the steps of defining a cavity in the chamber or in the vicinity of the cutter bits by supplying compressed air, inserting an image sensor into the cavity, and observing the inside of the chamber or the cutter bits using the image sensor.

REFERENCES:
patent: 1353908 (1920-09-01), Hodgson
patent: 3379024 (1968-04-01), Wohlmeyer
patent: 3830549 (1974-08-01), Sugden
patent: 4368924 (1983-01-01), Nussbaumer

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