An axial tensioned bolting system and method thereof

Details An axial tensioned bolting system and method thereof An axial tensioned bolting system and method thereof

B - Operations, Transporting

23

P

B23P 19/06 (2006.01) B25B 29/02 (2006.01) F16B 31/04 (2006.01)

Patent

CA 2274917

A bolting system for securing at least two structures having a bolt, a coupling nut, a hydraulic tensioner, and a lock nut. The bolt has a body with a threaded end and another end with a bolt head. The coupling nut is engageable with the threaded end of the bolt and has a top face having one or more dog indentations. The hydraulic tensioner has a hydraulic cell with an engagement end that engages the threaded end of the bolt. The hydraulic cell stretches the bolt while an engaging member of the hydraulic tensioner engages the dog indentations of the coupling nut with complementing, engaging member dogs. The engaging member rotates the coupling nut while the engagement end of the hydraulic tensioner tensions the bolt. The lock nut is engageable with the threaded end of the bolt.

L'invention porte sur un système de boulonnage servant à maintenir ensemble au moins deux structures et comportant un boulon, un écrou de couplage, un tendeur hydraulique, et un écrou de blocage. Le boulon comporte un corps dont une extrémité est filetée, et l'autre, munie d'une tête. L'écrou de couplage qui se visse sur l'extrémité filetée du boulon présente un ou plusieurs crans pour griffes. Le tendeur hydraulique comporte une cellule hydraulique dont l'extrémité de contact prend sur l'extrémité filetée du boulon. La cellule hydraulique étire le boulon alors qu'un élément de contact du tendeur hydraulique s'engage dans les crans de l'écrou de couplage avec ses griffes complémentaires. L'élément de contact fait tourner l'écrou de couplage tandis que l'extrémité de contact du tendeur hydraulique met le boulon sous tension. L'écrou de blocage se visse sur l'extrémité filetée du boulon.

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