A device for determining the angle of repose POWDER MATERIALS

摘要

The invention relates to measurement instruments, in particular to devices for measuring parameters of repose, and can be used to determine the quality, including the homogeneity and flowability, powder materials used in the manufacture of welding flux-cored wires. The technical result of the utility model provides for increased reliability of determining the homogeneity and flowability of powder materials by improving the accuracy of determining the angle of repose of the powder materials. The apparatus includes a base (1), guide columns (2) on which by means of bushes (3) and connecting rods (4) is fixed vertically movable ring (5) fixed therein with a funnel (6). Depending on the type of powder funnel is formed with a taper 9 ÷ 22 °, wherein its inner surface is polished with Ra 0.01 ÷ 0.16 microns. Based on (1) is set the main measuring scale (8) with a vernier scale (9) connected to the plate (10) with one of the bushings (3). Base (1) is mounted on two vertically adjustable supports (11) and one unregulated support (12). With the pin (13) on the base (1) is mounted a flat disc (14), wherein the pin axis (13) passes through the center of the disk (14), the angle between the plane of the disk (14) and the funnel axis (6) and 90 ± 0,1 °, wherein the funnel axis (6) coincides with the center of a flat disc (14). Based on a (1) a cylindrical layer (5). For removal of the electrostatic charge on the basis of (1) is mounted earthing screw (16).; The angle of repose β of the particulate material is calculated from the formula; Where,; D - diameter flat disk 14 made with an accuracy of ± 0,1 mm;; d - diameter of the outlet funnel 6 made with accuracy ± 0,1 mm.; h - height of the truncated cone of bulk material.; N.p.f. 1, 4 z.p.f. 2 yl.