Patent ID: 7092004

Claim:
An arrangement for inspecting pipes that are substantially transversal to gravity, said arrangement comprising as a combination: a flush unit ( 8 ) being ample to move inside a pipe ( 10 ), and at a proximal end (E P ) of said flush unit substantially backwards pointing nozzles ( 18 ); a flexible flush hose ( 9 ), a first end ( 12 a ) whereof attached to the flush unit, at the proximal end (E P ) thereof, and a second end ( 12 b ) extending to outside the pipe, said flush hose ( 9 ) being arranged to move the combination at a pulling speed (ν) against the recoil force (F) of the jets; liquid pressure means ( 20 ) connected to the other end of the flush hose in order to create a flow of a pressurized (P) liquid (V H ) along the flush hose to the flush unit and further through said nozzles to the pipe; a camera unit ( 1 ) comprising optical image forming means ( 5 ) at a distal end (E D ) of the combination and an image detector (S) as well as illumination means ( 2 ) and a power source (P), the optical image forming means being pointed substantially in the opposite direction with respect to the nozzles; characterized in that in said arrangement: the optical image forming means ( 5 ) include: a fish-eye lens ( 15 a ), or a lens ( 15 b ) with a smaller angular field of view, and in front of the lens a rotation symmetrical curved mirror ( 15 c ), or at least a number of radially outwards pointed lenses ( 15 d ); in order to create an image of a circumferential zone (K 1 ) on the inner surface of the pipe; and that the arrangement further includes: automatic locking means ( 4 a , 4 b ) for a mutual, detachable fastening of the camera unit ( 1 ) and the flush unit ( 8 ), at least partly one after another in order to form a scanner combination ( 13 ), so that the image forming means ( 5 ) and the nozzles ( 18 ) have a predetermined distance (L w ) that enables the creation of a wave trough length (L) by said jets in the liquid possibly contained in the pipe, at least at said zone (K i ).