초록 ▼

A method and apparatus for recirculation of atmosphere in a vacuum furnace which comprises a recirculation loop in which there is a low pressure line from the furnace chamber leading to a recirculation pump which pumps the recycled gas at a higher pressure to a high pressure line back into the furna

A method and apparatus for recirculation of atmosphere in a vacuum furnace which comprises a recirculation loop in which there is a low pressure line from the furnace chamber leading to a recirculation pump which pumps the recycled gas at a higher pressure to a high pressure line back into the furnace chamber. A means to analyze the furnace atmosphere is in communication with the high pressure line and signals its measurements of the atmosphere analysis to a valve on an enriching line. The enriching line passes enriched gas into either the high pressure line or the furnace chamber as the valve opens or closes. A means is provided to withdraw the gas from the furnace chamber in order to maintain the desired furnace chamber pressure as enriching gas is added.

대표청구항 ▼

An apparatus for recirculation of an atmosphere in a vacuum furnace having a furnace chamber, which comprises: a recirculation loop which further comprises: a low pressure line; an outlet from the furnace chamber to the low pressure line; a recirculation pump of the type which will translate a low p

An apparatus for recirculation of an atmosphere in a vacuum furnace having a furnace chamber, which comprises: a recirculation loop which further comprises: a low pressure line; an outlet from the furnace chamber to the low pressure line; a recirculation pump of the type which will translate a low pressure inlet stream to a high pressure outlet stream, connected to the low pressure line; a high pressure line passing from the recirculation pump; at least one jet inlet to the furnace chamber, for continuously forcing recirculationg furnace atmosphere into the furnace chamber, from the high pressure line; a means to analyze the furnace atmosphere, connected to the high pressure line; an enriching gas line in communication with the furnace chamber; a means to periodically withdraw gas from the furnace chamber whereby the furnace pressure is maintained. A method for recirculation of an atmosphere in a vacuum furnace, having a furnace chamber and a recirculation loop with an inlet and outlet to the furnace chamber, which comprises: starting up a recirculation pump of the type which will translate a low pressure inlet stream to a high pressure outlet stream, disposed within the recirculation loop; drawing the atmosphere at a low pressure with the recirculation pump, from the furnace chamber, through a low pressure line, to the recirculation pump; pumping the atmosphere to a higher pressure from the recirculation pump through a high pressure line and then to jet inlets into the furnace chamber; continuously forcing recirculating atmosphere through the jet inlets into the furnace chamber to continuously circulate the atmosphere within the furnace chamber; analyzing the atmosphere with a means to analyze which is connected to the high pressure line; feeding enriching gas through an enriching line in communication with the furnace; withdrawing gas periodically from the furnace chamber to maintain the pressure in the furnace chamber.