Detachable multi-stage depressurization throttling device

The utility model discloses a detachable multistage depressurization throttling device which comprises a convex flange, a guide pipe, a double-end stud, a nut and a throttling auxiliary assembly, one end of the convex flange is movably connected with the guide pipe in a clamping mode, one end of the convex flange is movably connected with the double-end stud in a clamping mode, and one end of the double-end stud is connected with the nut in a threaded mode. A double-end stud and a nut are locked in a threaded mode to fix a convex flange and a guide pipe, an annular arc clamping ring and a leakage-proof clamping groove formed in a connector pipe are mutually clamped, so that clamping between connectors is more stable, liquid is prevented from leaking out, a fixing ring and a clamping fixing ring arranged on a fixing circular ring are fixedly connected with a fixing groove and a fixing clamping groove in a clamped mode respectively, and therefore the liquid leakage prevention effect is achieved. The joint pipe