PURPOSE: To provide the pressurizing cylinder for a high-pressure treating device which executes high-pressure sterilization, change of properties, change of flavor, etc., by subjecting materials to be treated, such as liquid or pasty food and medical goods, to a high-pressure treatment.
CONSTITUTION: A free piston 25 is built in a converter 24 for the high-pressure treating device to respectively segment and form pressurizing chambers 26, 28. A pressure medium is supplied via a piping 30 into the pressurizing chamber 28. The free piston 25 is slid by this medium to force feed the materials to be treated toward the high-pressure vessel of the high-pressure treating device communicated with the pressurizing chamber 26 by which the materials are subjected to the high-pressure treatment. A slope 98 is provided on the outside wall of this converter 24 and an ultrasonic sensor 45 is mounted to this slope. A slope 99 is formed on the inside wall side of the converter 24 as well in the position corresponding thereto. The ultrasonic waves 101 from the ultrasonic sensor 45 progress in an arrow direction and fall onto the free piston 25. Only the reflected waves thereof can be detected by the sensor 45. The result of the detection is displayed on a processing screen. The exact position and speed of the free piston are thus detected.
YASHIMA MINORU
IIFUSHI JUNICHI
HORI KEIICHI
