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Title:
DETERIORATION DETERMINATION DEVICE OF LIQUID PUMPING APPARATUS, AND LIQUID PUMPING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2019/058731
Kind Code:
A1
Abstract:
A liquid pumping apparatus (1) is provided with: a casing (10) having formed therein a reservoir space (13) to 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 in 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 a 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 deterioration determination device (70) of the liquid pumping apparatus (1) is provided with: a first pressure sensor that is provided so as to be connected with the lower portion of the reservoir space (13), and detects the pressure of a liquid layer portion in the reservoir space (13); and a deterioration determination unit (75) that determines the deterioration degree of the valve operating mechanism (40) on the basis of the change of the pressure detected by the first pressure sensor.

Inventors:
SUGIE Yuichi (LTD. 881 Nagasuna Noguchicho, Kakogawa-sh, Hyogo 11, 〒6758511, JP)
Application Number:
JP2018/026832
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:
JP2013024274A2013-02-04
JP2002213399A2002-07-31
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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