Online hot standby pressure regulating device of product oil pipeline pressure reducing station

The invention discloses an online hot standby pressure regulating device of a product oil pipeline pressure reducing station. The device comprises two headers between two process pipelines, two pressure regulating branch pipelines between the two headers, a process belt executing mechanism ball valve, a pressure adjusting valve, two pressure transmitters, a local thermometer, a check valve and a process belt executing mechanism ball valve are sequentially connected on each pipeline in series, wherein each pressure transmitter is connected with a pressure controller, and high-pressure relays are connected between the process belt executing mechanism ball valves and the first pressure transmitters; the first process pipeline is connected with a pressure transmitter, and the pressure transmitter is connected with two pressure controllers; and the two pressure controllers and the pressure adjusting valve are connected with a low selector. The device has the beneficial effects that a pressure regulating system can