GAS-SEALING MEANS FOR SPACE OF BED OF HEATING OVEN

PURPOSE:To prevent the invasion of cool air into an oven from a side space between the stationary and movable beds of the oven, by providing a means for injecting high-temp. gas at the side space, and holding pressure at the side space higher than that in the oven by the injection of high-temp. gas. CONSTITUTION:A side space Z of a gap (d) is existent between the stationary bed 1 and the movable bed 2 of an oven, and a water-sealed box 3 is provided inside. A conduit 10 for high-temp. exhaust gas is introduced to the space Z, and a spray nozzle 11 at its top end is faced to the lower part of the space Z. A plate 12 for attaching the conduit 10 is fixed to the supporting plate 6 of the stationary bed 1 by bolts 13, and a heat-insulating material 14 is provided around the conduit 10. Exhaust gas G from a heating oven is supplied to said conduit 10 by a blower 15 and sprayed obliquely upwards through the spray nozzle 11. Since pressure at the space Z is held higher than that in the oven, the invasion of cool air is prevented so as to inhibit the cooling of steel materials and the formation of skid marks.