Poke hole closure apparatus

Patent · Tue Jul 08 00:00:00 EDT 1980

OSTI ID:5039557

Hamilton, W

A description is given of a poke hole closure assembly for a gas producer to minimize the escape of noxious or volatile gas from the producer during a poking operation, comprising closure means for a poke hole of a gas producer, said closure means comprising a block having an aperture therethrough, emans attaching said block to a gas producer so that said aperture is in substantial alignment with a poke hole, a cosure plate hinged to said block to block said aperture and poke hole during normal operating conditions and being openable to enable a poker to be inserted therethrough, and nozzle means responsive to the opening of said closure means to direct an inert gas into said poke hole, said nozzle means including passage means communicating with the interior of said aperture for conducting said inert gas to said aperture, said nozzle further including a hollow, conical insert mounted in said aperture, said insert having an opening therethrough to permit passage of said poker and having an outer conical wall spaced from an inner conical wall of said aperture, said passage means opening through said inner conical wall and into the space between said conical walls so that the inert gas will be directed downwardly and radially into said poke hole to block the outward passage of noxous or volatile gas from said poke hole when said closure plate is opened, means to prevent the entrainment of air in the downwardly and inwardly directed flow of inert gases comprising a plurality of ports extending through said insert from the space between said inner and outer conical walls to the opening through the insert to provide a blanket of inert gas which is sucked into the poke hole; to thereby prevent the entrainment of air.

• Assignee: McDowell-Wellman Co
• Patent Number(s): US 4211536
• OSTI ID: 5039557
• Resource Relation: Patent File Date: Filed date 16 Oct 1978
• Country of Publication: United States
• Language: English

Related Subjects

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TOXICITY
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VALVES
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EQUIPMENT
FLOW REGULATORS
FLUIDS
FUEL GAS
FUELS
GAS FUELS
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LOW BTU GAS
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010404* - Coal
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