B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
39/113
B22D 37/00 (2006.01) B22D 41/24 (2006.01) B22D 41/26 (2006.01)
Patent
CA 1229481
ABSTRACT OF THE DISCLOSURE Disclosed are refractory plate valves for controlling flow of molten material with structure providing a uniform controllable variable sealing pressure over the entire area of the sliding plate surface which surrounds the depending nozzle sufficient to deflect the refractory plates into a sealing relationship to prevent the intrusion of the molten material between the plates. One embodiment provides for peripheral support to prevent breakout even if thermal and abrasive wear of the plates allows formation of a fin of solidified material between the plates. The uniform pressure is applied to the sliding plate by pressurizing a fluid within a chamber in the sliding gate carrier that is immediately below a flexible diaphragm supporting the sliding plate. This pressure is applied from an external or internal source and may be controlled during the tapping and teeming phases of the use cycle and additionally may he completely relieved for ease of opening and closing of the device during the service phase of the cycle. The valves can be sliding valves of either the reciprocating or rotary style valves and can be either two plate or three plate variety. The valves can be sequential style in which individual plates are sequentially pushed or pulled under the opening to control flow. Likewise, there are various devices for opening and closing of the valve for servicing, or for reciprocating or rotating the sliding plate. The uniform pressure principle is applicable to refractories which are metal encased, bonded in, or banded, and to refractories which are symmetrical or assymmetrical. The stationary and sliding plates may optionally be identical or of different shape and/or thickness.
428537
Flo-Con Systems Inc.
Johnson Douglas S. Q.c.
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