DISENGAGEMENT PREVENTION STRUCTURE OF PIPE JOINT AND DISENGAGEMENT PREVENTION ENHANCEMENT METHOD OF PIPE JOINT

摘要

PROBLEM TO BE SOLVED: To improve sealing performance and disengagement prevention force by using the inner peripheral surface side of a pipe.;SOLUTION: In the disengagement prevention structure, a seal member 11 is attached to a space between confronting surfaces of an inner peripheral surface 2b of an insertion pipe part 2 and a small diameter inner peripheral surface 1b of a receiving pipe part 1 and both ends of an outer peripheral surface 10a of an inner surface connecting ring 10 attached to them. A compression operation means B is provided for compressing the respective seal members 11 in a sealed state from a pipe axis direction, and a first lock member 12 and a second lock member 13 are fixed on the inner peripheral surface 2b of the insertion pipe part 2 and the small diameter inner peripheral surface 1b of the receiving pipe part 1. A first disengagement restricting part 14 for preventing disengagement of the both pipe parts 1 and 2 by being abutted to the first lock member 12 from one side of the pipe axis direction and a second disengagement restricting part 15 for preventing disengagement of the both pipe parts 1 and 2 by being abutted to the second lock member 13 from the other side of the pipe axis direction are formed on the outer peripheral surface 10a of the inner surface connecting ring 10 in the state that a movable space S for allowing relative movement of the both pipe parts 1 and 2 along the pipe axis direction in the connection maintenance range is provided.;COPYRIGHT: (C)2007,JPO&INPIT