Graded flow guide pressure relief valve

The utility model discloses a graded flow guide pressure relief valve, relates to the technical field of pressure relief valves, and solves the problems that when gas in a pipeline is released through a pressure relief valve when the existing gas exceeds the limit, the pressure can only be quickly relieved in a short time, and a large amount of gas is unavoidably and suddenly released. According to the key points of the technical scheme, the device comprises a main mounting pipe, the outer ring face, close to an air inlet, of the main mounting pipe is provided with flow dividing holes arranged at intervals, and a flow dividing pipe is jointly mounted between the outer ring faces, corresponding to every two adjacent flow dividing holes, of the main mounting pipe; a matching cylinder is fixedly mounted on the inner ring surface, close to the two groups of shunting holes, of the main mounting pipe; a mounting rod is mounted at one end, away from the interior of the air inlet, of the main mounting pipe through th