Adjustable extension buckle

The embodiment of the utility model discloses an adjustable extension buckle, which is used for solving the technical problem that when an insulating rod of a nuclear phase instrument needs to be bound by an insulating tape to extend the length of the insulating rod for operation, the insulating rod is easy to fall off due to unstable winding of the insulating tape to injure people. The embodimentof the utility model comprises a connecting plate, symmetrical buckle bodies are arranged on the two sides of the connecting plate. Wherein the buckle body comprises a first semi-circular ring and asecond semi-circular ring, the first end of the first semi-circular ring is hinged to the first end of the second semi-circular ring, the first semi-circular ring can rotate around the second semi-circular ring, and a clamping part is arranged at the second end of the first semi-circular ring; clamping teeth matched with the clamping parts are arranged on the outer side wall of the second semicircular ring, and the clampin