LIQUID FEED DEVICE AND MONITORING METHOD FOR THE SAME

PROBLEM TO BE SOLVED: To provide a liquid feed device that can determine a failure such as clogging even if viscocity of a liquefied material changes, and to provide a monitoring method for the liquid feed device.SOLUTION: A monitoring method for a liquid feed device includes: a liquid feed step of...

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1. Verfasser: SHINOZAKI TSUTOMU
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a liquid feed device that can determine a failure such as clogging even if viscocity of a liquefied material changes, and to provide a monitoring method for the liquid feed device.SOLUTION: A monitoring method for a liquid feed device includes: a liquid feed step of feeding a liquefied material stored in a storage part to a liquid feed pipe by motor driving; an output step of outputting the liquefied material supplied from the liquid feed pipe from the output part through an output pipe; a circulation step of collecting the liquefied material supplied from the liquid feed pipe to the storage part through the circulation pipe; a switching step of switching flow paths of the liquefied material from the liquid feed pipe to either the output pipe or the circulation pipe; a measuring step of measuring a liquid feed pressure of the liquefied material in the liquid feed pipe; a calculation step of calculating a change amount of the liquid feed pressure value before and after flow path switch timing in the liquid feed part; a comparison step of comparing the change amount of the liquid feed pressure value before and after the flow path switch timing with a predetermined setting value; and a determination step of determining that the circulation pipe is abnormal when the change amount is equal to or exceeds the initial setting value.