Device for conveying thick substances containing a great deal of solid material
US5605174A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1994 |
| Grant date | Feb 25, 1997 |
| Priority date | — |
| Expiry date | Dec 27, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87652
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to a conveyor for thick substances containing a great deal of solids and having a conveyor pipe (20) which can be filled with the thick substances under pressure and at least one injection point (22, 24) opening into the conveyor pipe (20) to supply a lubricant (83) to the region (84) between the pipe wall and the surface of a plug flow of thick substance (82) being formed in the conveyor pipe (20). In order to center the plug flow (82) inside the conveyor pipe (20) and provide a stable layer of lubricant (83), the invention proposes that the conveyor pipe (20) have at least one annular waist at a distance from and downstream of the injection point (22, 24) formed by a collar or shoulder-like projection (62') inside the conveyor pipe (20). A bore (72) passing radially through the pipe wall for the connection of a lubricant injection line (76) may be provided in the flow shadow of the waist (62'), and at least one further waist (79) is provided downstream at a distance from the injection drilling (72).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.