WEAR-RESISTANT KNUCKLE BEND '' IGR '' Russian patent published in 2016 - IPC F16L43/00 F15D1/04 

FIELD: oil industry.

SUBSTANCE: invention relates to means of action on fluid flow in pipes or channels and can be used in gas, oil, chemical, metallurgical and coal industry. Wear-resistant knuckle discharge comprises input, output and central curved part with bending angle of 45° to 180°. Inside discharge along axis of curvature between planes of ends of inlet and outlet part there is a blade with sharpened edges and width of not more than diameter of discharge port. Blade has a surface of negative Gaussian curvature. Attachment of blades inside discharge near ends of input and output part is fixed and streamlined. Blade is made from mono- or poly-material which is stable in working medium.

EFFECT: technical result is elimination of concentrated action flow of medium contaminated with mechanical impurities on outlet wall and increased wear resistance of outlet.

3 cl, 4 dwg