Metallurgical apparatus – Means treating solid metal – Fluid tight heat transferring box shield or hood
Patent
1993-03-01
1994-03-01
Kastler, Scott
Metallurgical apparatus
Means treating solid metal
Fluid tight heat transferring box shield or hood
266256, C21D 100
Patent
active
052900177
ABSTRACT:
An improved cooling cover is disclosed for use in bell shaped annealing furnaces. The cooling cover includes a jet nozzle orifice arrangement which develops jet streams from a low pressurized supply of air at ambient temperature in the plenum chamber of the cooling cover. A multitude of free standing jet streams thus impinge the inner cover of the bell shaped annealing stand to produce improved cooling times. Importantly, the plenum chamber includes strategically placed axial jet pump outlets which are effective to draw the jet streams from the cooling cover after they have been in heat transfer contact with the inner cover in a distribution pattern which is not altered so that the work or coils within the inner cover can be more uniformly cooled than heretofore possible. The spent jet streams are withdrawn from the cooling cover in a manner which does not affect the initial impact of the jets with the inner cover while establishing a neutral to slight under pressure at the base of the cooling cover to prevent sand seal upset and hot gas backwash.
REFERENCES:
patent: 3832129 (1974-08-01), Derbyshire et al.
patent: 4278242 (1981-07-01), Freund et al.
patent: 4310302 (1982-01-01), Thekdi et al.
patent: 4596526 (1986-06-01), Soliman
patent: 4846675 (1989-07-01), Soliman
patent: 4891008 (1990-01-01), Hemsath
Hemsath Klaus H.
Lyon James E.
Indugas, Inc.
Kastler Scott
Nawalanic Frank J.
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