Nozzle replaceable type flow regulator and application method thereof

The invention relates to a nozzle replaceable type flow regulator and an application method thereof. The nozzle replaceable type flow regulator comprises an upper joint, a lower joint, a connection pipe, an inner pipe, a lining pipe and a plurality of nozzles with different drift diameters. The outer walls of the inner pipe and the lining pipe are in sealing contact with the inner wall of an innercavity formed by the upper joint and the connection pipe, a plurality of limiting grooves are formed in the outer walls of the inner pipe and the lining pipe, the distance between every two adjacentlimiting grooves in the multiple limiting grooves is equal to the distance between every two through holes in N through holes, a clamping block is fixedly arranged on the cavity wall of the inner cavity formed by the upper joint and the connection pipe, and the clamping block is clamped into one of the limiting grooves. The nozzle replaceable type flow regulator is simple in structure, the arranged multiple nozzles can be