Prying block type return pressure reducing automatic line sweeping pump

The utility model relates to a skid type return pressure reducing automatic line sweeping pump which comprises a base, a water storage tank, a plunger pump and a PLC control cabinet are installed on the base, line sweeping water is stored in the water storage tank, the side portion of the water storage tank is communicated with an inlet of the plunger pump through a pipeline, and an outlet of the plunger pump is communicated with a wellhead production pipeline through a line sweeping pipe. The PLC control cabinet is electrically connected with the wellhead return pressure electronic pressure sensor and controls the plunger pump to operate according to wellhead return pressure data transmitted by the wellhead return pressure electronic pressure sensor in real time. The plunger pump can be automatically controlled to operate, line sweeping is conducted in time, the cost for calling operation vehicles is saved, pollution and construction cost caused by oil and gas landing are reduced, and environmental protectio