| 摘要 |
<p>An elastomeric disc (20,22) for use on a pipeline pig (16) of the type having a longitudinal body (18) supported centrally within a pipeline (10) for movement by fluid flow therethrough, the disc (20,22) being in the form of a unitary elastomeric member (20,22) having an outer peripheral surface (40) concentric with the pipeline pig body longitudinal axis (14) and having an inner portion (42) of selected thickness with means for attachment (28,30) to the pipeline pig body (18) whereby the disc (20,22) is supported in a plane perpendicular the pipeline line axis (14), the disc member (20,22) having an integrally formed circumferential outer portion (40), the outer portion (40) being of increased thickness in relation to the spacing thereof from the disc center (38), the outer peripheral (40) surface being defined by first and second intersecting frustraconical surfaces (48,50), one of the surfaces (48,50) being parallel to the inner wall (12) of the pipeline (10) through which the disc (20,22) is moved in a first direction and the other of the surfaces (48,50) being parallel to the inner wall (12) of the pipeline (20) when the disc (20,22) is moved in a second direction.</p> |
