PUMP FOR TRANSPORTING AIR-PLACED MATERIAL Russian patent published in 1995 - IPC

FIELD: metallurgy. SUBSTANCE: pump has pressure-tight chamber mounted on the carriage, branch pipe for charging air- placed material, units for supplying air and discharging air-material mixture to the transport pipe line, safety air valve positioned on the cover of the chamber, aerating unit, and ring bubbler. The bubbler has vertical row of openings over periphery of the chamber. The openings point downward and are coupled with common ring groove closed by the flexible ring. The injecting pipe for transporting the air-placed material to the transport pipe line is mounted inside the chamber along its vertical axis above the outlet opening for permitting vertical movement. The pipe can operate as a stop valve. EFFECT: improved design. 8 dwg