Change-over apparatus for cooling gas passages in vacuum heat treating furnace
AssigneeIHI Corporation
InventorsKazuhiko Katsumata, Takuhiro Nakahara
Life of this patent
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Abstract
A change-over apparatus for cooling a gas passage is provided with a cooling chamber and a gas cooling and circulating system. The apparatus is further provided with a stationary partition plate and a slidable shield plate. The stationary partition plate has a suction opening and a discharge opening which are independently communicated respectively with a suction port and a discharge port, and the slidable shield plate has a shield part for partially shielding the suction opening and the discharge opening, whereby it is possible to alternately change over the direction of the gas passing through the cooling chamber.
Claims6
A change-over apparatus for a cooling gas passage in a vacuum heat treating furnace for cooling a heated article to be treated with a pressurized circulation gas, comprising a cooling chamber surrounding a cooling zone in which the article to be treated is stationarily placed, and a gas cooling and circulating system for cooling and circulating a gas passing through the cooling chamber, wherein the apparatus further comprises:
- a stationary partition plate partitioning between the cooling chamber and the gas cooling and circulating system, and a slidable shield plate adapted to be slidably driven along an outer surface of the stationary partition plate,
- the stationary partition plate having a suction opening and a discharge opening which are independently communicated, respectively, with a suction port and a discharge port of the gas cooling and circulating system, the slidable shield plate having a shield part which partially shield the suction opening and the discharge opening of the stationary partition plate, to thereby alternately change over a direction of the gas passing through the cooling chamber.
Dependencies are inferred from the claim text.