Anti-expansion limiting stopper capable of being disassembled quickly

The utility model discloses an anti-expansion limiting stopper capable of being disassembled quickly, comprising an outer sleeve, a pressing flange, two sealing rings and an inner cylinder, wherein the head part of the inner cylinder is inserted in the outer sleeve, the end part of the outer sleeve is convex outwards so as to form an annular containing cavity in which the sealing rings are arranged, and the pressing flange is inserted in the annular containing cavity from the outer end so as to prop against the sealing rings, and the two sealing rings are O-shaped. In the utility model, the outer sleeve and the pressing flange are used for extruding the sealing rings, so that certain pressure is generated on the inner cylinder after the compression of the sealing rings, thus achieving the sealing effect. For the anti-expansion limiting stopper, not only the expansion amount due to the expansion caused by heat and contraction caused by cold of a pipeline can be absorbed, but also part of the inner cylinder can