Concrete Pump

When pouring ready-mixed concrete into hopper, the internal agitator operates continuously to avoid concrete setting and segregation before pumping. Anti-clog design reduces aggregate accumulation to ensure smooth follow-up operations.

It generates pumping pressure by means of reciprocating motion of hydraulic piston, which pushes flow through the pipeline. A high-quality piston pumping system can enhance the equipment’s pumping pressure and reduce piston wear. Even with concrete mixtures of low slump and large aggregates, it can still achieve stable conveying performance.

The structure and material of the pipeline, along with the flexibility of the hose, directly determine the concrete’s delivery distance, height and flow rate. The pipeline structure is matched to the size of concrete aggregates to prevent clogging. Hose is mainly used for final-stage transportation due to its flexibility to adapt to various pouring operation requirements. All pipeline types all engineered with excellent sealing performance to prevent concrete leakage.

Concrete mixer truck discharges fresh and workable concrete into hopper, where the agitating device operates continuously at a low rotational speed to avoid solidification that causes subsequent pipeline clogging.

When concrete enter in pumping cylinder through feed inlet, hydraulic piston performs a reciprocating motion. As the piston retracts, a negative pressure is created inside the pumping cylinder, drawing concrete from hopper into the cylinder; as the piston advances, the valve system shifts to force the concrete from the pumping cylinder into the conveying pipeline.

Driven by hydraulic pressure, concrete is pushed into pipeline, flows along with pipeline or boom and ultimately reaches designated pouring position via end hose finally. Actual operation varies slightly across different models. For detailed operating instructions of a specific model, please click to view.

After each work shift or 8 consecutive hours of operation, equipment must undergo a set of basic inspection and maintenance.
Firstly, lubricate the rear of the pump body to make sure the flexibility of each rotating parts. Next, check liquid levels of various fluids, including hydraulic oil, diesel, power steering oil, coolant and top them up in a timely manner if fluid levels are low.

The hydraulic oil level must be maintained above 3/4 of the oil gauge; if the level is too low, the hydraulic pump will draw in air, leading to pressure loss and equipment wear. When replenishing hydraulic oil, it is imperative to use clean oil of the same brand and model as the original to avoid chemical reactions caused by mixing different types of oil, which would impair oil performance.

Hydraulic oil must be filtered regularly. It is recommended to use a filtration device with a 20μm filtration precision to remove impurities from the oil and prevent abrasive damage to hydraulic components. The quality of the oil should also be inspected on a regular basis: 30 minutes after shutdown, take 0.5 liters of hydraulic oil with a clean graduated cup. Normal hydraulic oil should be a clear pale yellow. If the oil emulsifies, becomes turbid or blackens, or if sediment accumulates at the bottom after standing for several hours, it indicates oil contamination, and the entire volume must be replaced immediately.

Common wearing parts of a concrete pump include pistons, S-valves, conveying pipelines and rubber hoses. Pistons are in direct contact with concrete and are prone to wear due to long-term reciprocating motion; a decline in piston sealing performance will cause pumping pressure loss. S-valves are responsible for switching between suction and pressure delivery channels; wear on an S-valve can lead to material leakage and unstable pressure. If the wall of a conveying pipeline or rubber hose thins or cracks, immediate replacement is required to prevent pipeline rupture during pumping.

Pouring work for core tubes, shear walls, elevator shafts and floor slabs in high-rise buildings places high demands on the vertical concrete conveying capacity of the equipment. For this application, truck-mounted boom pump is the optimal choice, because its hydraulic boom extends up to 56 meters, enabling direct concrete delivery to heights of tens of meters without the need for additional vertical pipeline installation. It not only saves the time and cost of pipeline laying, but also enables precise positioning for high-altitude pouring.

For large-scale infrastructure projects such as bridges, dams, tunnels and airport runways, concrete pouring is characterized by long delivery distances, large construction volumes and scattered pouring points. Boom pumps and high-pressure stationary concrete pumps can be combined for such scenarios as required. High-pressure concrete pumps enable the stable delivery of concrete with large aggregates and low slump, meeting the project requirements for concrete strength and continuous pouring.

Pouring for foundations, walls and floor slabs in multi-storey residential and rural self-built houses with small volumes, narrow sites and scattered pouring points, suits stationary concrete pumps or mixing-pumping integrated machines. Integrated machines enable one-stop batching and pumping for projects without mixing plants, while stationary pumps adjust pipelines to finish multi-point pouring in space-limited urban residential construction.

For large-area floor slab and atrium pouring in malls, complex buildings and other commercial structures requiring high pumping efficiency, high-displacement boom pumps are optimal for fast, continuous pouring and shorter construction periods. For factories, warehouses and other industrial facilities with limited space and poor large-equipment access, stationary concrete pumps deliver concrete indoors via pipelines for equipment foundations, ground and wall pouring.

High-pressure concrete pumps are ideal for special construction scenarios such as shotcrete support, slope reinforcement and water tank pouring. High-pressure pumps can deliver concrete mixtures to the construction surface via high-pressure spraying. They are also adaptable to the pouring of enclosed spaces such as water tanks and septic tanks, ensuring the compactness of the poured concrete.