Automatic drainage device for water-collecting well of silt-carrying pump station plant

The utility model discloses an automatic drainage device for a water-collecting well of a sediment-carrying pump station plant, which comprises a plant ground, a water-collecting well arranged on the plant ground, an ultrasonic liquid level meter arranged at the middle position above the water-collecting well, a base arranged on the plant ground, a sewage pump arranged at the top end of the base, and a water pump arranged at the bottom end of the sewage pump. A second water suction pipe is arranged on one side of the sewage pump, a first hose is arranged at the other end of the second water suction pipe, a first water suction pipe is arranged at the other end of the first hose, a bottom valve is arranged at the bottom end of the first water suction pipe, a first water drainage pipe is arranged on the other side of the sewage pump, and a second hose is arranged on the other side of the first water drainage pipe. A second drainage pipe is arranged at the other end of the second hose, and a pressure transmitter