Induction heating furnace and bottom tapping mechanism thereof
AssigneeShinko Electric Co., Ltd.
InventorsMasanori Tsuda, Atsushi Okuno, Yasuhiro Nakai
Life of this patent
Estimating the term…
Abstract
An induction heating furnace includes a furnace body having a side wall extending so obliquely as to increase in radius from the bottom to the top edge portion and formed by a plurality of longitudinally split, conductive segments arrayed circumferentially and insulated from each other, a first induction heating coil arranged at an outer periphery of the side wall for subjecting a to-be-heated material accommodated in the furnace body to induction heating and a melt-use power source for supplying AC power to the first induction heating coil.
Claims17
An induction heating furnace comprising:
- an accommodating vessel for accommodating a material to be melted, the accommodating vessel having a bottom, a tapping portion formed at the bottom, and a side wall formed by a plurality of longitudinally split, conductive segments arrayed circumferentially and insulated from each other;
- a coil arranged at an outer periphery of said tapping portion and said side wall, for subjecting the material in said accommodating vessel to induction heating;
- a power source for supplying power to said coil;
- and
- a power source controller for controlling an amount of power produced by said power source such that said tapping portion may be selectively switched between open and closed states by melting and solidification of the material at the tapping portion.
An induction heating furnace comprising:
- an accommodating vessel having a bottom, a top edge portion, and a side wall extending so obliquely as to increase in radius from said bottom to said top edge portion and formed by a plurality of longitudinally split, conductive segments arrayed circumferentially and insulated from each other;
- a coil arranged at an outer periphery of said side wall for subjecting a material accommodated in said accommodating vessel to induction heating;
- and
- a power source supplying AC power to said coil.
An induction heating furnace comprising:
- an accommodating vessel having a bottom, a top edge portion, a tapping portion formed at said bottom, and a side wall extending so obliquely as to increase in radius from said bottom to said top edge portion and formed by a plurality of longitudinally split, conductive segments arrayed circumferentially and insulated from each other;
- a coil arranged at an outer periphery of said tapping portion and said side wall for subjecting a material accommodated in said accommodating vessel to induction heating;
- a power source supplying AC power to said coil;
- and
- a power source controller for controlling an amount of power produced by said power source such that said tapping portion may be selectively switched between open and closed states by melting and solidification of the material.
A bottom tapping mechanism in an induction heating furnace, including:
- an inverted-hollow-cone-shaped aperture bored in a bottom of an accommodating vessel for accommodating therein a molten material;
- a funnel-shaped tapping portion comprising an inlet portion formed within said aperture and contacting an inner periphery thereof, and a hollow-pipe-like outlet portion integrally formed with and located below said inlet portion, said tapping portion being divided into a plurality of segments by a plurality of slits which are continuous to each other and connected to cooling water feed and discharge pipes;
- induction heating coils arranged around said tapping portion at the inlet portion and the outlet portion, respectively;
- and
- a solidification-use power source portion and a melt-use power source portion connected to said induction heating coils.
Dependencies are inferred from the claim text.