GAMMA-FLAW DETECTOR Russian patent published in 2013 - IPC G01N23/00 

FIELD: machine building.

SUBSTANCE: gamma-flaw detector includes a composite protection unit in the form of a stationary one-piece cylinder equipped with an eccentric cavity and a collimation outlet opening and corresponding to the eccentric cavity of a turning rotor equipped by means of a protective rod-shaped holder with an emission source in the eccentric channel with a hole coaxial to the collimation opening, and device for rotor turning through 180°. On the drive half-axis of the rotor there reinforced is a gear with external engagement, the end surface of which is formed with an arc-shaped groove concentrically to its constituent surface; the above groove provides the possibility of its discrete rotation together with the rotor in the azimuth angle range of 180°, which is strictly restricted with a limit stop corresponding to the groove profile and made in the form of a cylindrical pin statically reinforced in the housing. The gear is constantly adjacent kinematically and in a reduced manner (reduction of not less than 2) to a sector of a gear wheel, which is polarised by means of a spring and reinforced on the corresponding axis with possibility of pendulum movements transmitted to it with a rotor turning device through the gear and providing the polarised power fixation of the rotor in diametrically opposite discrete positions of emission and overlapping of a radiation beam.

EFFECT: increasing safety and improving reliability of protective properties considering sanitary norms of radiation security, improving accuracy and reliability of the control method.

4 cl, 4 dwg