METHOD FOR CONTROLLING A CONCRETE PUMP FOR RESUMING THE CONCRETE MIXTURE AND FOR THE REVERSE PUMPING OF THE CONCRETE MIX AFTER STOP

摘要

1. A method for controlling a concrete pump to resume concrete flow after stopping, comprising: swinging the S-shaped control valve (17) in the hopper (18) so as to allow the first end of the S-shaped control valve (17) to leave the originally connected concrete supply cylinder and join to another concrete supplying cylinder, and then changing the direction of movement of the main hydraulic cylinders relative to the directions before stopping so as to start supplying the concrete mixture to the concrete pipeline using another concrete tsilindra.2 feed. The method according to claim 1, characterized in that before the rocking step of the S-shaped control valve (17) in the hopper (18), the method further includes: keeping the S-shaped control valve (17) stationary and changing the direction of movement of the main hydraulic cylinders for concrete pumping back concrete mixes. 3. The method according to claim 1, characterized in that before the rocking step of the S-shaped control valve (17) in the hopper (18), the method further includes: determining whether the stop period of the concrete pump was longer than a predetermined value; if the stop period was greater than or equal to a predetermined value, then keeping the S-shaped control valve (17) stationary and changing the direction of movement of the main hydraulic cylinders for pumping the concrete mixture in the opposite direction from the concrete conduit. 4. A method according to any one of claims 1 to 3, characterized in that the step of supplying the concrete mixture includes: the pumping step: pushing the concrete mixture from the concrete feed cylinder connected to the S-shaped distribution valve (17) into the S-shaped distribution