| 摘要 |
A delivery pipe (1) for the transport of solids is described. The delivery pipe (1) has a double-layer pipe body (2) which has in each case a coupling collar (7, 8) at the inlet-side pipe end (5) and at the outlet-side pipe end (6). A first wearing ring (9) and a second wearing ring (10) are provided in the region of the inlet-side coupling collar (7) such that they are arranged one behind another in the longitudinal direction of the pipe body (2). The second wearing ring (10) which lies on the inside has a length (L) which is dimensioned to be greater than or equal to half the internal diameter (ID) of the pipe body (2). As a result, wear phenomena can be reduced in the inlet-side region of the delivery pipe (1) and the service life of the delivery pipe (1) can be increased considerably.
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