| 摘要 |
pipeline fittings. SUBSTANCE: check valve is designed to shut off return flow. Valve has inlet channel of constant cross-section, tapered seat, intermediate channel of constant cross-section, outlet channel with projections, and ball positioned in succession. Ball is designed to prevent fluid medium passage from outlet channel to inlet channel. Inlet and intermediate channels are formed by internal surfaces of torus segments. Outlet channel projections are formed by crossing of cylindrical surface sections of outlet channel through hole and sections of side walls of inclined grooves. Sum of inlet section areas of grooves at outlet channel entry is equal to or more than cross-sectional area of inlet channel. Cross-sectional area of intermediate channel exceeds sum of cross-sectional areas of inlet channel and axial section of ball. EFFECT: simplified construction with reduced hydraulic resistance. 5 cl, 2 dwg |
