PNEUMATIC CONCRETE-PLACING MACHINE

FIELD: mining industry. ^ SUBSTANCE: invention can be used for delivering concrete mix at fastening mine workings to place of concreting. Proposed pneumatic concrete-placing machine consists of vessel with charging and discharge holes, car, concrete line and pneumatic system. Pipe is located on bottom of vessel to supply compressed air from pneumatic system to zone of influence of discharge hole equipped with check valve, bottom of vessel being made inclined. Concrete line is furnished with ejecting device and manifold in form of elbow installed coaxially with ejecting device. Ejecting device is arranged on lower section of concrete line directly after discharge hole of vessel, and manifold is arranged after ejecting device. Part of concrete line after manifold is made flexible, corrugated, and ejecting device and manifold are installed with possibility of uncoupling. ^ EFFECT: improved efficiency of operation owing to prevention of formation of air locks in concrete line and accumulation of mix at bottom of vessel. ^ 2 dwg