METHOD OF CONTROL OF CONCRETE PUMP FOR RESUMPTION OF SUPPLY OF CONCRETE MIX AND FOR BACK PUMPING OUT OF CONCRETE MIX AFTER STOP Russian patent published in 2015 - IPC F04B15/02 

FIELD: engines and pumps.

SUBSTANCE: invention relates to concrete pumps. The method of control of the concrete pump for resumption of supply of concrete mix after stop includes the following steps. Swinging of S-shaped distributive valve (17) in the bin (18) so that to allow the first end of the S-shaped distributive valve (17) to disconnect from the initially attached concrete supply cylinder and to connect to another concrete supply cylinder. Then it is necessary to change the directions of movement of the main hydraulic cylinders with reference to the directions before the stop to start supply of the concrete mix into the concrete supply line by means of another concrete supply cylinder. The method of control of the concrete pump for back pumping out after stop includes the following steps. Keeping S-shaped distributive valve (17) in the bin (18) in a fixed position and change of the direction of movement of the main hydraulic cylinders so that to start pumping out of concrete mix from the concrete supply line in the opposite direction.

EFFECT: method helps to improve condition of concrete mix in the bin, in S-shaped distributive valve and in concrete supply cylinders.

9 cl, 5 dwg