Bolted joint
AssigneeConstructions Navales et Industrielles de la Mediterranee
InventorPaul Meuret
Life of this patent
Estimating the term…
Abstract
A device for connecting body members of pressure vessels, such as the covers of nuclear reactor pressure vessels, especially to permit the rapid removal and fitting of lids or covers of such pressure vessels, includes a stud bolt to be mounted in one of the members while passing through an aperture in an adjacent member, the bolt being provided with a head and a clamping nut, a metal member adapted to fit between the adjacent member and the head, and means for heating the metal member to cause expansion thereof against the head to allow tightening and release of the clamping nut.
Claims16
A system for securing a cover to and releasing such cover from a pressure vessel, said system comprising:
- at least one stud bolt having a first end firmly securable in one of a vessel or a cover therefor, said stud bolt being dimensioned to extend through an aperture in the other of said vessel or said cover therefor, and said stud bolt having a second end positioned beyond said other of said vessel or said cover therefor when said stud bolt extends therethrough;
- a clamping nut means threaded onto said stud bolt for pressing said other of said vessel or said cover therefor against said one of said vessel or said cover therefor;
- a head firmly attached to said stud bolt at a position thereon outwardly of said clamping nut means;
- and
- bolt stretching means, positioned between said head and said other of said vessel or said cover therefor, for expanding upon the application of heat thereto in a direction axial of said stud bolt and for thereby stretching said bolt and moving said clamping nut means away from said other of said vessel or said cover therefor, whereby said clamping nut means may be selectively tightened or loosened.
In a pressure system of the type including a pressure vessel, a cover and means for securing said cover to and releasing said cover from said pressure vessel, the improvement wherein said securing and releasing means comprises:
- at least one stud bolt having a first end firmly secured in one of a vessel or a cover therefor, said stud bolt extending through an aperture in the other of said vessel or said cover therefore, and said stud bolt having a second end positioned beyond said other of said vessel or said cover therefor;
- a clamping nut means threaded onto said stud bolt for pressing said other of said vessel or said cover therefor against said one of said vessel or said cover therefor;
- a head firmly attached to said stud bolt at a position thereon outwardly of said clamping nut means;
- and
- bolt stretching means positioned between said head and said other of said vessel or said cover therefor, for expanding upon the application of heat thereto in a direction axial of said stud bolt and for thereby stretching said bolt and moving said clamping nut means away from said other of said vessel or said cover therefor, whereby said clamping nut means may be selectively tightened or loosened.
Dependencies are inferred from the claim text.