PROCEDURE FOR LOOSE MATERIAL RUNNING FLOW SAMPLING AND FACILITY FOR ITS IMPLEMENTATION Russian patent published in 2010 - IPC G01N1/20 

FIELD: machine building.

SUBSTANCE: equal proportions of material from running flow are periodically cut off for samples in specified and equal time intervals; also equal amount of material is cut off to sample from all parts of flow at cross and straight cross section of flow and its equal thickness. Amount of sampled material is proportional thickness of flow at different flow thickness. In the beginning running flow of loose material is directed along trajectory of free fall. Further, it is crossed with a divider along its whole width and thickness in cross section. Its cross part is cut off, and material is simultaneously removed with the divider in a lengthwise direction along whole thickness of flow. Also material is mixed, there is formed a flow of material with specified parametres and its qualitative characteristics are determined. The facility consists of a sampler installed in the flow of loose material on a frame and travelling by means of a chain drive, of a driving gear connected to an electric motor by means of a reducer, and of a driven rotary screw installed in a case of the sampler; also the case has upper loading and lower un-loading slots. The loading slot of the sampler case has length equal or bigger, than thickness of falling flow of loose material, while the screw with an alternated step from the upper loading to the lower unloading slot rotates at constant speed around its proper axis and in the direction of lengthwise section of the falling flow of loose material. An unloading trapdoor is installed under a receiving conveyor; a material spreader is positioned above continuous moving surface of the conveyor.

EFFECT: raised reliability of loose material samples facilitating application of instruments for continuous control of material quality.

4 cl, 3 dwg, 1 ex