Tension Relief System And Apparatus For Use With A Pipe Reduction Die

摘要

Apparatus and method for removing a pipe liner from a diameter reducing die using a double nut system whereby the nuts are incrementally loosened to gradually relieve tension on the die until the assembly can be safely separated while reducing the risk of injury or damage to operators and equipment.

主权项

1. A diameter-reducing die comprising:
a generally annular top half comprising:
a top interior side and an opposing top exterior side with a top terminal end extending therebetween; anda top mating block rigidly attached to said top exterior side, said top mating block having a facing side generally coplanar with said top terminal end and an opposing threading side with a bore hole extending generally perpendicularly therebetween; a generally annular bottom half comprising:
a bottom interior side and an opposing bottom exterior side with a bottom terminal end extending therebetween; anda bottom mating block rigidly attached to said bottom exterior side having a facing side generally coplanar with said bottom terminal end and an opposing threading side with a bore hole extending generally perpendicularly therebetween; and a threaded rod; wherein said generally annular top half and said generally annular bottom half, when joined, are generally annular and circumscribe a volume generally in the shape of a conical frustum, and said top bore hole and said bottom bore hole align to form a contiguous bore hole; wherein said threaded rod is positioned through said contiguous bore hole; and wherein said threaded rod is sufficiently long to extend through both ends of said contiguous bore hole and have two nuts attached at both ends thereof without said generally annular bottom half or said generally annular top half imparting any force on said nuts.