RADIATION DUST CONCENTRATOR Russian patent published in 2007 - IPC G01N23/06 

FIELD: measuring technique.

SUBSTANCE: radiation dust concentrator has chamber for placing radiation receiver in it; receiver has collimation opening in wall disposed at side of radiator, air-feeding pump, which has inlet branch-pipe to be pneumatically connected with space of mentioned chamber and with rarefaction detector. Filtering band is disposed between source and collimation opening and it goes along wall of chamber at the side of source. There is pneumatic system for compressing band against wall of chamber. Pneumatic system for compressing band against wall of chamber is not coupled with sample-taking pipe and it is made in form of cylinder, which is disposed coaxial to sample-taking channel and which is connected with diaphragm of pseudo-cylinder or with movable surface of bellows. Sample-taking pipe is motionless connected with case of device and it reaches the level of top border of source. Clamping unit of band is made in form of cylinder, which is disposed coaxial to sample-taking pipe and which is attached to spring-loaded motionless diaphragm of pneumatic cylinder or with movable surface of bellows; it moves along generator of sample-taking channel. Inlet branch-pipe of pump is connected with cavity of pneumatic cylinder or bellows through chamber for placing radiation receiver. Radiation source is made in form of hollow cylinder or flat washer, mounted coaxial to central channel and to collimation opening.

EFFECT: improved reliability of operation; improved precision of measurement; reduced power consumption.

1 dwg