Air suction type natural gas pipeline leakage detection device

The utility model relates to an air suction type natural gas pipeline leakage detection device, which comprises a fixing frame, a fixing block and an arc-shaped plate, two gears are symmetrically and rotatably arranged on the fixing frame, one end of the fixing frame is fixedly connected with a motor, and an output shaft of the motor is coaxially and fixedly connected with one gear; the number of the arc-shaped plates is two, and the two arc-shaped plates are fixedly connected with the two gears through connecting rods correspondingly. Pipelines are fixedly mounted in the two arc-shaped plates; during detection, the two arc-shaped plates are connected to the joint of the two natural gas pipelines in a sleeving mode, then gas at the joint is sucked into the fixed pipe through the gas suction pump, and when the combustible gas sensor detects natural gas leakage, the controller starts the alarm to give an alarm. Therefore, the equipment can conveniently and quickly perform leakage detection on the joint of the t