Refrigeration – Article moving means
Patent
1998-10-14
2000-07-25
Doerrler, William
Refrigeration
Article moving means
62 78, 148634, 148644, F25D 2500, F24F 316, C21D 1613, C21D 600
Patent
active
06092389&
ABSTRACT:
In an apparatus that rapidly cools heat treated metal strips with a recirculating nitrogen-hydrogen cooling gas mixture having a hydrogen content which ranges between 15%-50%, and a recirculation circuit for the gas mixture having a fan for creating a flow though recirculation ducts connected, through expandable compensator corrugations, upstream to at least one gas/water exchanger, a safety system operates with the exchanger. The safety system includes a housing having a main flow area upstream of the exchanger and into which recirculating cooling gas flows. A first register is interposed across the main flow area for selectively switching between open and closed states thereby passing or blocking flow through a major portion of the main flow area. At least one bypass flow area is defined within the housing and located adjacent the main flow area. A second register is interposed across the bypass flow area for selectively switching between open and closed states thereby passing or blocking flow through the bypass area. Respective sensors react to a break in the strip or the corrugation, or an interruption of power, and actuators rapidly respond to a plurality of dangerous conditions for activating the sensing means and for switching the first and second registers in accordance with the particular dangerous conditions.
REFERENCES:
patent: 4398700 (1983-08-01), Thome
patent: 4836774 (1989-06-01), Harada et al.
patent: 5137586 (1992-08-01), Klink
Doerrler William
Stein Heurtey
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