When using the cylinder piston, move it back and forth by a few centimeters each time. Gradually adjust the position through multiple operations until reaching the desired location. Be cautious not to extend the oil cylinder piston too far, as this may push the concrete piston deep into the cylinder. To address this issue, insert a piece of square wood into the concrete cylinder from the S-tube cavity and use a jack to push the piston back into the water tank.
Before spraying concrete, pre-lubricate the pipeline with water and diluted mortar. This helps ensure a smooth flow before the actual concrete is sprayed. Make sure the concrete mixture is prepared correctly, maintaining consistency throughout the entire transportation process. Equip transport vehicles with built-in mixing functions to avoid segregation and ensure optimal performance.
Maintain adequate levels of hydraulic oil and ensure its cleanliness. Proper maintenance is crucial for preventing blockages in pipelines. Pay close attention to operational details to minimize issues. For instance, operators should remain focused and regularly check the condition of the concrete being pumped. Avoid pumping substandard concrete, as this can lead to blockages.
Monitor pressure readings continuously during pumping. A sudden increase in pressure indicates potential blockages. In such cases, immediately reverse the pump for a couple of cycles. If reversing doesn’t resolve the issue, remove and clean the pipes promptly to prevent further complications.
Selecting an appropriate pumping speed is essential. Start at a slower pace during the initial stages to overcome pipeline resistance. Once the pumping stabilizes, you can increase the speed. However, if signs of blockage appear or the concrete slump decreases, switch back to a lower speed to prevent further issues.
Keep an eye on the material level in the hopper. The material should never drop below the stirring shaft to prevent air from being sucked into the system. Overloading the hopper with excessive material can also lead to problems. Regularly clear coarse aggregates and oversized particles to maintain smooth operations.
If concrete starts to settle shortly after mixing, do not attempt to force it through the pump. Instead, remove the material from the hopper’s bottom. Adding water to the hopper to thin out the mix is not recommended, as this can exacerbate blockages. During breaks, periodically run the pump to keep the lines clear, especially in hot conditions or when the concrete has begun to set.
After completing a pumping session, always clean the pipelines thoroughly. Failure to do so can lead to blockages during subsequent operations. Addressing blockages promptly is key to maintaining efficient pumping. Common causes include poor-quality concrete, improperly sized aggregates, or insufficient lubrication.
To determine the exact location of a blockage, conduct a forward-reverse pump test while observing the pipeline. Vibrations near the pump outlet indicate the affected area, while sections beyond the blockage remain still. Tapping the suspected area with a wooden mallet might help dislodge minor obstructions. If these methods fail, consider segmental cleaning by disassembling the pipes and clearing them systematically.
By adhering to these practices, you can significantly reduce the likelihood of blockages and maintain consistent pumping efficiency.
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