Vacuum pipeline sweeping device for oil conveying pipeline of product oil wharf and control method of vacuum pipeline sweeping device

The invention discloses a product oil wharf oil conveying pipeline vacuum line sweeping device and a control method thereof.The line sweeping device comprises an oil unloading pump, a vacuum tank and a vacuumizing device, one end of the oil unloading pump is connected with an oil tanker through a connecting hose, the other end of the oil unloading pump is connected with a wharf approach bridge pipeline, and the vacuum tank is connected with the wharf approach bridge pipeline through a first pipeline; a first control valve is arranged on the first pipeline, the vacuum tank is connected with the connecting hose through a second pipeline, a second control valve is arranged on the second pipeline, and the vacuumizing device is connected with the vacuum tank through a pipeline. The vacuum pipeline sweeping device for the oil conveying pipeline of the product oil wharf is simple in structure, mature in automatic control technology and low in cost compared with a nitrogen pipeline sweeping mode; in addition, residua