Vibration characteristics analysis of high-pressure long-distance dense paste pipeline transporting with hydraulic active check valve

The pumping pressure required for long-distance pipeline transporting of dense paste is very high, the pumping system vibrates strongly, and the pipeline system is seriously damaged. In order to study the causes of vibration and the effect of hydraulic active check valves, pressure shock and pipeline vibration tests were conducted on the transporting pipeline in the field. The paper compared the data of sensors at each measurement point and analyzed the relationship between the action logic of each actuator of the transporting system and pressure shock and pipeline vibration. The first three orders of resonance bands of the pipeline system were obtained and radial vibration of the pump outlet pipeline was found to be greater than axial vibration. The S-pipe valve commutation was the direct cause of the pressure shock when the S-pipe valve took precedence over the piston commutation. Pressure shock increases with pumping volume. The opening of the check valve caused a large axial transient vibration and a small radial transient vibration on both sides of the valve. The above study of field data provides a reference for the selection of dense paste transporting pipeline parameters, the design of pipeline system and the research on the method of reducing the pipeline impact vibration.