Multi-hinge type anti-blocking elastic clamp positioning mechanism

The invention discloses a multi-hinge type anti-blocking elastic clamp positioning mechanism, which comprises a recovery pipe, an elastic clamp frame, pull-back plates, elastic clamp pliers, an elastic clamp seat, a middle hinge, a lower hinge, a first spring pin, second spring pins, a third spring pin, a fourth spring pin, a fifth spring pin and a sixth spring pin. The upper end of the recovery pipe and a salvaging spear head assembly are assembled, the elastic clamp frame is assembled in the recovery pipe, the first spring pin is fixedly mounted on the upper part of the recovery pipe, and the fifth spring pin is fixedly mounted on the lower part of the recovery pipe; left and right plier bodies of the elastic clamp pliers are assembled on the elastic clamp seat in a hinged mode through the second spring pins, and the pull-back plates are assembled at the upper ends of the two plier bodies in a hinged mode correspondingly; the other ends of the left and right pull-back plates are hinged together; the middle hinge is connected to the bottom of the elastic clamp seat; the lower hinge is connected to the bottom of the middle hinge, and the bottom of the lower hinge is further assembled on the elastic clamp frame in a hinged mode. By means of the multi-hinge type anti-blocking elastic clamp positioning mechanism, the purposes of improving drilling efficiency of a rope coring drillrig, lowering the labor intensity of operators and reducing the occurrence probability of drilling accidents are achieved.