What factors may cause the abnormal pressure of the end connection of the concrete conveying hose?

Blockages or Obstructions: The presence of large aggregates, debris, or dried concrete within the hose can create blockages. These obstructions restrict the flow of concrete, causing a build - up of pressure upstream of the blockage, particularly at the concrete hose ends. As the pump continues to force concrete through, the pressure rises abnormally as the concrete struggles to pass the obstructi

Several factors can contribute to abnormal pressure at the concrete hose ends during concrete pumping operations.

Blockages or Obstructions: The presence of large aggregates, debris, or dried concrete within the hose can create blockages. These obstructions restrict the flow of concrete, causing a build - up of pressure upstream of the blockage, particularly at the Gabion Box. As the pump continues to force concrete through, the pressure rises abnormally as the concrete struggles to pass the obstruction.

Incorrect Hose Diameter or Length: Using a hose with an inappropriate diameter that is too small for the required flow rate of the concrete mix can lead to increased pressure at the hose ends. The smaller diameter restricts the cross - sectional area through which the concrete can flow, resulting in higher resistance and thus abnormal pressure. Similarly, if the hose length is excessively long without proper consideration of the pump's capacity, the friction between the concrete and the hose walls over the extended distance can cause a significant pressure rise at the ends.

Wear and Tear of Hose Components: Over time, the inner lining of the concrete hose can wear out due to the abrasive nature of the concrete mix. This wear creates rough surfaces inside the hose, increasing the friction between the concrete and the hose walls. As a result, more pressure is needed to push the concrete through, leading to abnormal pressure at the concrete hose ends. Additionally, damaged or worn - out couplings at the hose ends may not seal properly, causing pressure leaks in some cases, but in others, irregular flow patterns can develop, contributing to abnormal pressure conditions.

Pump Malfunctions: Issues with the concrete pump itself can directly affect the pressure at the hose ends. For example, a malfunctioning pump valve that does not open and close correctly can disrupt the smooth flow of concrete. This irregular flow can cause pressure surges within the system, with the effects being most pronounced at the concrete hose ends. An over - pressurized pump, perhaps due to incorrect settings or a faulty pressure - regulating mechanism, can also force an excessive amount of concrete into the hose, resulting in abnormal pressure at the ends.

Changes in Concrete Mix Properties: Variations in the concrete mix, such as an increase in the proportion of fine aggregates or a change in the water - cement ratio, can alter the flow characteristics of the concrete. A mix that is too sticky or thick will not flow as easily through the hose, requiring higher pressure to move it. This increased pressure demand is reflected at the concrete hose ends, potentially leading to abnormal pressure levels.