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    • 56. 发明专利
    • FACILITY AND METHOD FOR MEASURING LEVEL AND CONCENTRATION OF LIQUID IN TANK
    • JPH1114528A
    • 1999-01-22
    • JP15181998
    • 1998-06-02
    • COGEMA
    • DRAIN FRANCOISGAGNIERE JACQUES
    • G01F23/14B65D90/48G01F23/16G01N9/28G21F9/22
    • PROBLEM TO BE SOLVED: To provide a facilities and method in inexpensive and simple structure which solve the problem points of danger of contamination and clogging for utility, specially, in atomic industry by using one dipped valve probe. SOLUTION: The facilities include a reference probe 16 which terminates above the liquid in a tank 12 and one dipped valve probe 22 which has its lower end B terminated in the liquid and has a dip part 22a of wide sectional area above its lower end to specific height Hd. The reference probe 16 and valve probe 22 are linked with each other through a valve forming means 30 which is brought under opening/closing control so that compressed air is supplied. The compressed air is supplied while the valve forming means 30 is closed and after the liquid in the valve probe 22 is pressed down, the supply of the compressed air is stopped and the valve forming means 30 is opened to raise the liquid level in the valve probe 22. During this period, the air in the valve probe 22 is discharged to a tank dome 17 through the valve forming means 30. The differential pressure between both the probes is measured and on the basis of a threshold and the differential pressure at a section point of a slope, the height level and concentration of the liquid are calculated.
    • 58. 发明专利
    • SLURRY SPECIFIC GRAVITY MEASURING INSTRUMENT
    • JPH03162647A
    • 1991-07-12
    • JP30153489
    • 1989-11-20
    • ASAHI GLASS CO LTD
    • TANAKA NOBUTSUGUIWANAGA YASUNARI
    • G01N9/28
    • PURPOSE:To prevent a nozzle from being blocked and to measure the specific gravity of a slurry continuously for a long period by providing two pipes inserted into slurry liquid, an air supply means which supplies air for measurement, a blow liquid supply means, a switching means, and a measuring means. CONSTITUTION:Pipes 12 and 14 are inserted into a slurry tank 10 while having a constant depth difference DELTAh. The compressed air which is supplied from an air pressure source 20 through a valve 22, a filter 24, and a needle valve 26 is regulated to the blow pressure by a pressure reduction valve 28 and sup plied as the air for measurement to solenoid valves 16 and 18, and also adjusted by a pressure reduction valve 30 and supplied as blow air to three-directional two-position solenoid valves 16 and 18. The upper end parts of the pipes 12 and 14 are branched and solenoid valves 23 and 34 for protection introduce the back pressure of the air for measurement to a differential pressure sensor 41 by turning off solenoids 32A and 34A during measurement. Further, the solenoids 32A and 34A are turned on throughout the air blow period to prevent the blow pressure from being applied to the differential sensor 41.