Analysis on Vibration Characteristics of Spring Passive Valve High-Pressure Long-Distance Slime Paste Pipeline Transportation

Coal slime is high concentration and viscosity, which has viscoelastic characteristic when transporting in pipe of high pressure and long distance. The paste is compressed by the double-cylinder plunger pump in long pipe. When the pump switched, the pressure disappears instantly and paste flows back, forming a reverse impact on the pumping equipment, which causes severe vibration of the pumping system. In order to reduce the reversed flow and vibration, a spring passive check valve is installed at the pump outlet, but its effect is not clear. This paper analyzes the effect of the hydraulic check valve on the vibration characteristics based on the test data of the long distance pipeline in project, and carries out the actual vibration measurement and analysis. The vibration characteristics of the spring passive check valve dense paste transportation pipeline are obtained based on the viscoelastic paste axial vibration model of the pipeline, which provides a reference for the selection of coal slime paste transportation pipeline parameters and the method of reducing the shock and vibration of the pipeline system.