Patent ID: 7207769

Claim:
A gas turbine comprising ring a segment and a blade ring that concentrically surround a rotating blade rotor which rotates inside a casing and are coupled to a casing sequentially from inside and having a sensor provided thereto that detects clearance between tip of rotating blade of the rotating blade rotor and inner circumference surface of the ring segment: wherein, the sensor is integrated together with a first guide pipe by having an edge of the first guide pipe, inside of which has a cooling fluid introduced into, screwed together with a posterior portion thereof; and the anterior portion thereof including a detecting element is pressed to the ring segment so as to retain, penetrating through the ring segment, by having the first guide pipe penetrate through the blade ring from outside of the casing and pressed forcedly to the ring segment; wherein, a cable from the sensor is led to outside of the casing through the first guide pipe after being introduced into inside of the first guide pipe through a leading-out outlet being formed in the posterior portion; and wherein, the sensor has a through-hole formed therein which leads the cooling fluid being introduced into inside of the first guide pipe to periphery of the anterior portion.