Several points for attention when pumping concrete pump truck

  Concrete pump truck in the pumping, the operator can not blindly map. And in the pumping construction should concentrate, hopper material can not pile up too much, should be below the protective barrier, in order to facilitate the timely cleaning of coarse aggregate and super aggregate. Found that a bucket of concrete collapse is small, can not be pumped, should immediately from the bottom of the hopper out of concrete, easy to save trouble, forced pumping easily blocked. Never mix water in the hopper.

  The first time when pumping, because the concrete pump truck pipeline resistance is larger, at this time should be low-speed pumping, pumping normal, can be appropriately increased pumping speed. There are signs of blockage or a car concrete collapse, should be low-speed pumping, will be blocked out in the budding state. When the slump degree of concrete is small, the residual material can be lower than the mixing shaft, and controlled above the“S” pipe or suction inlet to reduce the mixing resistance, swing resistance and suction resistance. This method only applies to“S” valve series concrete pump.

  When suction, the operator should observe the pump bucket at any time the remaining material, the remaining material must not be less than the mixing shaft, if too little, easy to suck in air, causing the pump truck jam. Always pay attention to the reading of the pump pressure gauge. If you find a sudden increase in pressure gauge readings, should be immediately reverse pumping 2 ~ 3 stroke, and then the pump to correct and plug the pipeline. If the back pump (positive pump) has been running for several cycles, pipe plugging has not been ruled out, should be removed in time to clean up, otherwise it will make pipe plugging more serious.

  Boom pump truck in the stop period, every 5 ~ 10 minutes, the specific time depends on the day of the temperature, the collapse of concrete, concrete setting time to prevent the pump truck jam. For the shutdown time is too long, has been the initial set of concrete, should not continue pumping. The last pump truck pumping finished, the pipeline is not clean, will cause the next pump when the pipe is blocked. So every pump must be in accordance with the rules of operation will be sent to the pipeline clean.