CS248297B1 - Thermal protection of gamma radiation detector for tubes' wall thickness measuring devices - Google Patents

Description

1

Ha3BaHHe Η3θ6ρβΤβΗΗΗ

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3Set22: 552_2Z3522I2_2222EeIeH2H

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PesioMe

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Claims (1)

FIELD OF THE INVENTION Thermal protection for a gamma-ray detector a device for measuring the thickness of pipe walls, in particular with a cylindrical probe or an ionization chamber as a gamma-ray detector, for determining the thickness of warm, stationary or moving pipes in longitudinal tubes. direction, with the temperature y < = 1123 &lt; 0 &gt; K and the distance between the hot oven and the radiation detector being minimized, characterized in that the gamma-ray detector (2) is located in the carrier and prior to mechanical damage by a protective holder (1 ) of a measuring device in which a pressurized water cavity is formed having a pressure of 10 and 2 x 10 4 Pa, wherein a silicate absorbent filter (3) is placed at the inlet (4) in front of the detector (2), reflecting the radiant radiation and permeable to gamma the radiation, and at the measuring point, the oven (6) is surrounded by an intermediate part (5) of a roller conveyor consisting of double walls for pressure water of 10 ^ - 2 x 10 Pa Pa and equipped with an inlet and outlet hole záření ·