A concrete pump truck contains a concrete pump that is fixed to the chassis of a truck. This means the truck drives to the site with the mounted pump on it for concrete pumping to begin. The pump is usually hydraulic and can lift and place concrete pipes straight into the pour location. During set up at the site the concrete pump truck’s outriggers at the front and rear are drawn to anchor and provide stability during the concrete pumping.
The first step is usually the dumping of wet concrete from a mixer truck onto a hooper at the rear end of the concrete pump truck. Large rocks are prevented from falling through by a mesh grate located in the hooper. This is crucial as it prevents large rocks from blocking the hoses during complete pumping. An augur in the hooper also keeps churning the concrete so that it is in a liquid state.
The concrete will then flow into the piston pump’s twin cylinders. The twin material cylinders work in coordination. On the forward stroke, one cylinder push the concrete into the pipeline while the other retracts drawing material from the hooper. To ensure that concrete flows freely and to keep the pressure consistent the pistons move in opposite directions.
Once the material cylinder has retracted a signal is sent to the S-tube swing cylinder and the drive cylinder directional valves. The S-tube moves to the loaded material cylinder. Consequently, the concrete material on the loaded cylinder is pushed through the S-tube by the loaded cylinders’ concrete piston. The concrete is pushed further forward onto the delivery lines.
The pump can be operated by remote control or can be operated from the control panel. Hydraulic oil flow push the cylinder pistons. The drive cylinder pistons and concrete pistons move at the same time as they are linked. When a drive cylinder is drawn in the same will happen to the concrete piston. Concrete is drawn into the cylinder in the process. The concrete is subsequently moved onto the S-tube and through the concrete pipes. The S-tube valve switches to the other material cylinder at the end of the stroke continuing the cycle.
The engine provides the power to drive the hydraulic pumps. All controls can be done locally as they are mounted on the truck. It is also possible to use remote radio control from a distance to specify the pour, to direct the pour to the desired location and for all other operations. At the end of pour reverse pumping can be done to clean the hoses.
A concrete pump truck can be used to pump concrete at the rate of one meter cubed per minute. The hydraulic pump also guarantees a precise pour and the ability to navigate various obstacles. Integration of electrical and hydraulic systems in the concrete pump truck ensure that seamless performance is achieved. Lastly the inherent advantages of using a concrete pump truck are self-evident. There is quick delivery, adequate time to work on concrete and cost savings on manpower.