Heat processing apparatus
AssigneeNakajima Dokosho Company Limited
InventorMasahiko Nakajima
Life of this patent
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Abstract
In the heat processing apparatus, a combustible gas evaporated from a liquefied gas tank is mixed with air and supplied from a gas mixture supply means to a combustion chamber, where the gas mixture is subjected to complete and flameless combustion through the catalyst, and the combustion heat is conducted to the iron tip for use in the heat processing of a work. A gas flow channel with a reduced flow resistance is formed continuously through out the catalyst for decreasing the pressure loss in the gas mixture. Further, ignition ports at the inlet of the combustion chamber are provided with a shutter mechanism for closing the ports after the completion of the ignition. The improved structure of the gas flow channel and the shutter co-operate to attain more effective and stable combustion in a compact structure of the apparatus.
Claims11
A heat processing apparatus using a liquefied gas as a heat source comprising:
- a nozzle for jetting out a combustible gas from a liquefied gas tank by way of a gas discharge valve assembly,
- a gas mixture generation means disposed at the exit of said nozzle for introducing external air to a stream of said combustible gas jetted out from said nozzle under the ejector effect to thereby generate a gas mixture,
- a gas mixture supply means for supplying the thus generated gas mixture to the downstream portion of the apparatus,
- means including openings for igniting said gas mixture disposed at the downstream end of said gas mixture supply means surrounding the stream of said gas mixture at the downstream end of said gas mixture supply means for introducing additional external air through said openings and for igniting said gas mixture,
- means forming a shutter mechanism to open and close said ignition openings,
- means forming a combustion chamber disposed at the downstream end of said ignition openings and having an inlet at its upstream end for receiving the stream of said gas mixture and an exhaust gas port at its downstream end for discharging exhaust gases,
- a combustion catalyst disposed to the inside of said combustion chamber, said catalyst being formed with gas flow passages extended continuously from the upstream to the downstream ends of said chamber so as to decrease the flow resistance to said gas mixture passing therethrough, and
- an iron tip connected to the downstream end of said combustion chamber for use in the fabrication of a work.
Dependencies are inferred from the claim text.