Eccentric rotating probe for inspecting tubes and the like

Details Eccentric rotating probe for inspecting tubes and the like Eccentric rotating probe for inspecting tubes and the like

G - Physics

01

N

G01N 27/90 (2006.01) G01B 7/28 (2006.01)

Patent

CA 2162390

A probe used for inspecting tubes or pipes comprises an elongated flexible shaft, a plurality of axially spaced guides on the shaft, the guides being engageable with the inner surface of a tube for maintaining the shaft substantially concentrically disposed within the tube, and a housing for a sensing element, the housing being secured to the shaft for rotation therewith and disposed between a pair of the guides, the housing having a tube contact area for engagement with the inner surface of the tube. The sum of the radial displacement of the contact area from the axis of the shaft of each of the housing and guides is greater than the inner diameter of the tube so as to cause the shaft to urge the housing and the pair of guides in radially opposed directions.

Sonde utilisée dans l'inspection de tubes ou de tuyaux. Elle comporte un arbre allongé et souple, une pluralité d'éléments de guidage espacés les uns des autres dans le sens axial sur l'arbre, et adaptés pour se placer au contact de la face interne d'un tube afin de garder l'arbre dans une position sensiblement concentrique par rapport au tube, ainsi qu'un boîtier pour un élément détecteur, ce boîtier étant solidaire en rotation de l'arbre, disposé entre une paire d'éléments de guidage, et doté d'une zone de contact destinée à venir au contact de la face interne du tube. Dans chacun des ensembles boîtier et guides, la somme du décalage radial de la zone de contact par rapport à l'axe de l'arbre est supérieure au diamètre interne du tube, de sorte que l'arbre pousse le boîtier et la paire de guides dans des sens radialement opposés.

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