ROTARY PORTAL MIXER Russian patent published in 2024 - IPC B01F27/85 B01F27/90 B01F27/92 B22C5/04 

FIELD: various technological processes.

SUBSTANCE: invention relates to devices for mixing compositions based on sand and binding additives, in particular for preparing sand-kaolin mixtures for use in moulding moulds in metallurgy. Mixer comprises a bowl with a removable cover made of two identical halves, a portal of two L-shaped posts interconnected by the intermediate shaft housing, transmitting rotation from central geared motor to central driven shaft, on lower end of which, in cylindrical conical housing of broadening, 3 levers with tools-plows are fixed radially. On horizontal beams of portal L-shaped posts are installed diametrically opposite two ripping rotor heads with drives from geared motors through intermediate shafts in bearing housings, which are fixed on them pivotally and can be installed at an angle in vertical plane. Cylindrical bowl is arranged between vertical beams of L-shaped posts. In the upper half of the bowl, on the outer side, diametrically opposite, there are U-shaped brackets covering the posts and having at the ends traverses with central holes for installation of two screws of jacks fixed on outer sides of vertical posts of the portal. With their help, the bowl is lifted and lowered behind the lower planes of the traverses by means of flywheel nuts. In the lower position of the bowl, working tools and protective armour of the bowl are installed and replaced. Tool-plow is made of polyurethane, has a flat-parallelepiped shape with a narrow face cut at an angle, adjacent to the bottom plane, and in the end part it has a wall-scraper for removal of material of the mixture from the corners of the bowl. Tool-blades of loosening rotor heads are made of polyurethane in the form of bushings with hexagonal central holes and have on the outer cylindrical surface single bosses in the form of rectangular plates, made at an angle to the end surface. Tools-blades are installed on hexagonal driven shafts of rotary heads at angle of 120 degrees relative to each other, forming a kind of helical spatial blade structure fixed from below with washers and bolts. Tool-plows have two C-shaped bosses on the rear side for clamping by means of spacers and bolts on the levers of the central driven shaft during their installation or adjustment as they wear.

EFFECT: simplification of installation of drives of working tools, convenience of their replacement and protective armour, increase of efficiency in general.

10 cl, 12 dwg