A stationary concrete pump works by using a hydraulic system to push concrete through a pipeline to a desired location, often utilizing a placing boom for precise placement.
Here's a breakdown of the process:
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Concrete Delivery: Ready-mix concrete trucks deliver the concrete to the pump site. The concrete is discharged into the pump's hopper.
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Hopper & Agitation: The hopper acts as a holding area for the concrete. Often, an agitator is present within the hopper to keep the concrete from settling or segregating.
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Pumping Unit (Hydraulic System): The heart of the stationary concrete pump is its pumping unit. This typically consists of:
- Hydraulic Cylinders: These cylinders provide the force needed to move the concrete.
- Concrete Cylinders: These cylinders receive concrete from the hopper.
- Valve System (S-Valve or Rock Valve): A valve (commonly an S-valve or rock valve) alternates between connecting one concrete cylinder to the hopper (to receive concrete) and the other to the delivery pipeline (to push concrete out). This alternating action creates a continuous flow.
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Pumping Cycle: The hydraulic cylinders drive pistons within the concrete cylinders. As one piston retracts, it draws concrete from the hopper into its cylinder. Simultaneously, the other piston extends, pushing concrete from its cylinder into the pipeline. The valve then switches, and the process reverses.
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Delivery Pipeline: The concrete is forced into a series of connected pipes, called the delivery pipeline. These pipes can run horizontally, vertically, or at angles, allowing concrete to be delivered to hard-to-reach areas.
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Placing Boom (Optional): For greater precision and reach, the pipeline is often connected to a placing boom. The placing boom is a remotely controlled, articulated arm that allows the operator to direct the concrete flow exactly where it's needed.
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Continuous Operation: The pumping unit continues to cycle, maintaining a constant flow of concrete through the pipeline until the job is complete.
In summary, a stationary concrete pump uses a hydraulic system and alternating cylinders with a valve system to efficiently move concrete from a delivery truck, through a pipeline, and precisely to its final placement location.
