Centralizer for internal pipe inspection device

Details Centralizer for internal pipe inspection device Centralizer for internal pipe inspection device

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 55/26 (2006.01) F16L 55/18 (2006.01) G01N 29/265 (2006.01) H04N 7/18 (2006.01)

Patent

CA 2128619

Internal pipe inspection apparatus (10) is disclosed having a novel collapsible centralizer mechanism (11) for an in-line pipe inspection head. The inspection apparatus is insertable into different size pipelines (12) through a small, lateral service opening (60). The apparatus includes a compact inspection pipe head (16) having a viewing assembly (18) for imaging the interior of the pipe. The head is sized to pass through a standard lateral service opening substantially less in diameter than the diameter of the pipe. Various collapsible centralizing members (12) are described for positioning the pipe inspection head viewing assembly substantially concentric with an axis of the pipe. The novel centralizers include multiple bendable support legs which are pivotally connected at different points to the inspection device such that each leg forms a substantially sinusoidal shape when extended and each leg collapses close to the inspection head and trailing ferrules (44, 46) when retracted for insertion into (or removal from) the pipe. The sinusoidal-shaped legs are selectively biased to their extended positions.

Cette invention concerne un appareil de contrôle interne de tuyauterie (10) muni d'un mécanisme de centrage repliable novateur (11). L'objet de l'invention peut être inséré dans des tuyauteries de différents diamètres (12) par une petite ouverture latérale de visite (60). L'appareil comprend une tête de contrôle compacte (16) à optique (18) de visionnement de l'intérieur de la tuyauterie. Cette tête est dimensionnée pour pouvoir passer par une ouverture de visite standard de diamètre sensiblement inférieur à celui de la tuyauterie à contrôler. L'invention prévoit différents éléments centreurs repliables (12) servant à positionner l'optique sensiblement dans l'axe longitudinal de la tuyauterie. Le mécanisme de centrage novateur comprend plusieurs pattes repliables, articulées en différents points à l'appareil de contrôle. Ces pattes adoptent en position dépliée la forme d'une courbe sensiblement sinusoïdale et se replient tout près de la tête de contrôle et ses ferrures arrière (44, 46). Elles comportent chacune un ressort d'extension manoeuvrable séparément.

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