Clamping device for migration test of plastic diaphragm

The utility model discloses a clamping device for a plastic diaphragm migration test, which comprises a plurality of sequentially overlapped clamping rings, the plurality of clamping rings are connected through bolts, a gap between every two adjacent clamping rings is used for clamping a plastic diaphragm, and a plurality of first through holes are formed in the side surface of each clamping ring; second through holes used for installing bolts are formed in the same radial position of the multiple clamping rings. The ends, close to each other, of every two adjacent clamping rings are provided with a groove and a protruding block which are used for being connected in a clamped mode respectively. According to the utility model, the plurality of plastic membranes are separated by the clamping rings, so that the plurality of plastic membrane samples can be prevented from being attached to one another; two adjacent clamping rings can be used for clamping the plastic membrane, so that the periphery of the plastic m