| 摘要 |
Annulus Measuring Device Measuring device (10) for quickly and accurately determining the thickness of an annulus (56) between two cylindrical members, such as the catalyst retaining screens (58, 60) of a radial flow reactor, at any point along its length or around its circumference, comprises a wheeled cart having two sets of angularly mounted wheels (22, 24) which straddle the inner screen (58) and a pair of spring loadedplungers (40) with ball shaped contacts (46) which contact the outer screen (60). As the device is lowered into an annulus with a cable (70), a pair of ultrasonictransducers (94, 95) positioned inside the cart direct opposed beams radially of the annulus to permit the radial distance between the screens to be measured.
|
