| 摘要 |
The invention relates to a pipe junction for two-cylinder viscous matter pumps, comprising a spectacle-type plate (30) that faces the cylinders and has two openings (14) which communicate with conveying cylinders (10, 12), and a swivel pipe (32) that can be swiveled back and forth between the two openings (14) in front of the spectacle-type plate (30). At the end facing the spectacle-type plate, the swivel pipe (32) supports a cutting ring (34) which can be axially moved to a limited extent and can be pressed against the spectacle-type plate (30). The cutting ring (34) is fitted with a supporting ring (46) and a protective structure (48) which is made of wear-resistant material, is closed in the circumferential direction, and is integrally joined to the supporting ring (46) at least on the surface facing the spectacle-type plate. In order to prevent excessive wear on radially projecting parts of the swivel pipe, the supporting ring (46) of the cutting ring is provided with a wear-resistant shielding element (82) which radially projects from the protective structure and forms a deflection area (84) for the viscous matter that is discharged from the opening (14) during a switching process, said deflection area (84) shielding the end (80) of the swivel pipe (32) which faces the cutting ring. |
