Automatic non-pressure inspection control system for water pump

The utility model discloses a water pump automatic non-pressure inspection control system which comprises a pressure transmitter, a PLC control box and a frequency conversion speed regulator, the pressure transmitter is installed on a water outlet pipeline of a water pump, the PLC control box is connected with the pressure transmitter through a shielding cable to receive signals, the frequency conversion speed regulator is installed in the PLC control box and connected with a PLC through a shielding cable to receive signals, and the frequency conversion speed regulator is connected with the PLC through the shielding cable to receive signals. When the system is in an automatic state, the inspection time and the inspection duration of each water pump are preset in the PLC. According to the utility model, the corresponding water pump is controlled by the variable-frequency governor to run, and the water pump runs slowly without water outlet pressure, so that a non-pressure inspection effect on a pipe network is