Rotary sampling apparatus for powdered or granular materials

A rotary sampling apparatus for powdered or granular materials designed to be incorporated into a mounting pedestal of a material storage container, said mounting pedestal having a material discharge passage extending therethrough, said apparatus comprising:

• a base block having a pressurized gas introduction passage, a sample discharge passage, and a sample storing hole, said base block being adapted to be incorporated into a recess formed in a side wall of said pedestal and in communication with said material discharge passage in such a manner that said block is contained in said recess;
• a rotatable measuring table with a measuring hole, said measuring table being inclined in said recess relative to said material discharge passage so as to face said material discharge passage in order to receive a portion of the powdered or granular materials charged in said material discharge passage as samples, said portion received including a surplus amount;
• a scraper for scraping off said surplus amount of the powdered or granular materials received in said measuring hole of said measuring table, said scraper being provided in said recess so as to contact said measuring table;
• a rotary actuator for rotating said measuring table in order to change said measuring hole of said measuring table from a material sampling position to a sample discharge position in which said measuring hole matches said sample storing hole of said base block;
• and
• pneumatic control means for forcedly and pneumatically discharging the powdered or granular materials received in said measuring hole of said measuring table less said surplus amount through said sample discharge passage after having dropped the materials received in said measuring hole of said measuring table into said sample storing hole of said base block by feeding a pressurized gas into said pressurized gas introduction passage of said base block.