PUMP WITH NITROGEN FUZZY SYSTEM

PURPOSE: A pump with nitrogen fuzzy system is provided to reduce maintenance cost by protecting a check valve and an elbow from contaminated exhaust gas and powder, and protecting the check valve from a counter-flow even when a vacuum pump stops its operation. CONSTITUTION: A vacuum pump comprises a...

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Bibliographic Details
Main Authors JANG, HYEON JU, KIM, GEUN HO
Format Patent
LanguageEnglish
Published 15.12.2000
Edition7
Subjects
BLASTING
HEATING
LIGHTING
MECHANICAL ENGINEERING
POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS
PUMPS
PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
WEAPONS
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Summary:PURPOSE: A pump with nitrogen fuzzy system is provided to reduce maintenance cost by protecting a check valve and an elbow from contaminated exhaust gas and powder, and protecting the check valve from a counter-flow even when a vacuum pump stops its operation. CONSTITUTION: A vacuum pump comprises a pump body, an elbow, and a check valve, where an exhaust gas emitted from the pump body sequentially passes through the elbow and the check valve and is discharged. The vacuum pump further comprises a nitrogen fuzzy pipe(120) connected to the elbow and which ejects N2 gas toward the check valve. The nitrogen fuzzy pipe is connected with a nitrogen fuzzy system(130) for maintaining nitrogen gas supply pressure constant and controlling nitrogen gas supply. The nitrogen fuzzy system includes a flow meter(136) for measuring the amount of nitrogen gas supply, a shutoff valve(134) for shutting off nitrogen gas supply when the pump body stops its operation, and a regulator(132) for maintaining nitrogen gas pressure being supplied during the operation of the pump body constant.
Bibliography:Application Number: KR19990018974