Oil pipeline variable-frequency pump and regulating valve combined pressure regulating device

The utility model discloses a variable frequency pump and regulating valve combined pressure regulating device for an oil pipeline. The device comprises a process pipeline, a first pressure transmitter is arranged on the pressure sensor; first pressure indicator, the device comprises a first process gate valve, a second pressure transmitter, a second pressure indicator, a variable-frequency and variable-speed pump, a third pressure indicator, a third pressure transmitter, a second process gate valve, a fourth pressure transmitter, a fourth pressure indicator, a first process ball valve, a fifth pressure indicator, a regulating valve, a sixth pressure indicator, a second process ball valve and a fifth pressure transmitter. One end of the bypass pipeline is connected between the first pressure indicator and the first process gate valve, the other end of the bypass pipeline is connected between the second process gate valve and the fourth pressure transmitter, and a check valve is connected in the oil flow direc