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Title:
STATE DETERMINATION DEVICE OF LIQUID PUMPING APPARATUS, AND LIQUID PUMPING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2019/058730
Kind Code:
A1
Abstract:
A liquid pumping apparatus (1) is provided with: a casing (10) having formed therein a reservoir space (13) in which an inflow liquid is kept; a gas supply valve (20) for introducing working gas into the reservoir space (13); an exhaust valve (30) for exhausting the working gas in the reservoir space (13); and a valve operating mechanism (40) that executes a pumping process of pumping the liquid from the reservoir space (13) with the pressure of the working gas by opening the gas supply valve (20) and closing the exhaust valve (30) when a float (41) disposed in the reservoir space (13) rises to a predetermined high level, and executes an inflow process of causing inflow of the liquid into the reservoir space (13) while exhausting the working gas by closing the gas supply valve (20) and opening the exhaust valve (30) when the float (41) descends to a predetermined low level. A state determination device (70) of the liquid pumping apparatus (1) is provided with: a pressure sensor (71) that detects the pressure of the reservoir space (13); and a determination unit (72) that determines whether the operating state of the liquid pumping apparatus (1) is in the pumping process or in the inflow process, on the basis of the pressure detected by the pressure sensor (71).

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Inventors:
SUGIE Yuichi (LTD. 881 Nagasuna Noguchicho, Kakogawa-sh, Hyogo 11, 〒6758511, JP)
Application Number:
JP2018/026831
Publication Date:
March 28, 2019
Filing Date:
July 18, 2018
Export Citation:
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Assignee:
TLV CO.,LTD. (881 Nagasuna, Noguchicho Kakogawa-sh, Hyogo 11, 〒6758511, JP)
International Classes:
F16T1/48; F04F1/06; F16T1/20
Foreign References:
JP2002213399A2002-07-31
JP2012037031A2012-02-23
Attorney, Agent or Firm:
TERAZONO Kenichi et al. (Yamabiko Bldg, 9-16 Oyodominami 1-chome, Kita-ku, Osaka-sh, Osaka 75, 〒5310075, JP)
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