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How Does a Concrete Pump Works

2014/6/25 1:14:49


When renting or buying a concrete pump, you often hear such terms as rock valve, swing valve, or ball valve used to describe a particular pump type. What is the valve’s role in the pump’s operation and how do the various valve types differ? Following is a brief description of the operation of a concrete pump and how the different valve systems work.
The Pumping Operation
The concrete pumping operation starts with the discharge of the concrete, usually from a ready mix truck, into a hopper large enough to hold a small supply of fresh concrete. In the hopper an agitator keeps the fresh concrete flowing smoothly into the pumping cylinders.
Concrete pumps operate on the same principle as a twin cylinder reciprocating engine, in which one cylinder draws concrete from the hopper on the return stroke and another pushes it on the forward stroke into the line. Pistons in both cylinders operate in opposite directions so there is constant pressure on the concrete in the line and uninterrupted flow. The pistons are driven by hydraulic cylinders powered by a hydraulic pump
A synchronized valve enables concrete from the two cylinders to go into one pump discharge line. This valve is often used to distinguish one type of pump from another.