Online dynamic pressure monitoring device for oil and gas pipeline

The utility model discloses an on-line dynamic pressure monitoring device for an oil and gas pipeline, and relates to the technical field of monitoring devices. The device comprises an oil and gas pipeline, an alarm device and a monitoring system, the alarm device comprises a main body and an alarm, the main body is installed on the oil and gas pipeline in a penetrating mode, the alarm is fixedly installed at the top end of the main body, a conical groove is formed in one end of the main body, and a conical ejector rod is inserted into the conical groove in a sliding mode; the conical ejector rod is moved out of the space between the metal contact pieces, the spring drives the metal contact pieces to move oppositely through elastic force, the metal contact pieces are attached to each other, the two connecting lines are communicated, the alarm gives an alarm, and therefore the situation that air leakage cannot be found in time can be avoided, and the purpose of giving an alarm in time is achieved. Collected da