Rotary nozzle system for metallurgical vessels
US4480771A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 12, 1980 |
| Grant date | Nov 6, 1984 |
| Priority date | — |
| Expiry date | May 12, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D41/26
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A rotary nozzle system for metallurgical vessels, especially steel ladles, whose stationary closure portion or part contains a refractory bottom plate and whose rotatable closure portion or part contains a rotatable toothed rim mounted at the stationary closure portion and a refractory slide plate which bears against the bottom plate. There is solved the problem of enabling a rapid, uncomplicated exchange, especially of the bottom plate and the slide plate with the particular task of automatically reestablishing each time a condition which ensures for operational reliability of the rotary nozzle system. This is obtained by constructing the rotatable closure portion or part as a housing having a rigid cover member which is detachably connected at the rotatable toothed rim. Internally of the housing there is located a pressure plate which receives the slide plate. Since the pressure plate is in direct rotatable engagement with the rotatable toothed rim and is supported, by means of spring elements, at the housing, preferably at the cover member, there is realized a stable construction with a predictable force flow. In particular, the contact or pressing forces are independent of the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.