LIQUID SUPPLY DEVICE USING CHECK VALVE AND REACTIVE LIQUID CHROMATOGRAPHY SYSTEM

Title:

LIQUID SUPPLY DEVICE USING CHECK VALVE AND REACTIVE LIQUID CHROMATOGRAPHY SYSTEM

Document Type and Number:

WIPO Patent Application WO/2011/013285

Kind Code:

A1

Abstract:

It makes it possible to correctly determine whether a change in the pressure or flow rate is caused by normal opening and closing operations of a check valve, to monitor in real time whether an operation of a check valve is normal or abnormal in a liquid supply device or a system therefor, and to easily perform troubleshooting for the liquid supply device and the system therefor, in order to enhance the reliability of the liquid supply device. Light is introduced in the check valve and a change in the quantity of light transmitted through or reflected by the check valve, caused by the opening and closing of the valve is detected, so that the opening and closing operations of the check valve can be directly detected, whereby the opening and closing operations can be monitored. Moreover, a check valve having the above function is arranged in a pipe in the liquid supply device, and a change in the pressure in the pipe is monitored on the basis of a signal from a pressure sensor which detects the pressure in the pipe and a signal which represent the opening and closing of the check valve.

Inventors:

DEGUCHI, Kisaburo (HITACHI HIGH-TECHNOLOGIES CORPORATION 882, Oaza Ichige, Hitachinaka-sh, Ibaraki 04, 〒3128504, JP)
出口喜三郎 (〒04 茨城県ひたちなか市大字市毛８８２番地　株式会社　日立ハイテクノロジーズ　那珂事業所内 Ibaraki, 〒3128504, JP)
KAJI, Hironori (HITACHI HIGH-TECHNOLOGIES CORPORATION 882, Oaza Ichige, Hitachinaka-sh, Ibaraki 04, 〒3128504, JP)
加地弘典 (〒04 茨城県ひたちなか市大字市毛８８２番地　株式会社　日立ハイテクノロジーズ　那珂事業所内 Ibaraki, 〒3128504, JP)
ISHII, Kimihiko (HITACHI HIGH-TECHNOLOGIES CORPORATION 882, Oaza Ichige, Hitachinaka-sh, Ibaraki 04, 〒3128504, JP)
石井公彦 (〒04 茨城県ひたちなか市大字市毛８８２番地　株式会社　日立ハイテクノロジーズ　那珂事業所内 Ibaraki, 〒3128504, JP)
AKIEDA, Daisuke (HITACHI HIGH-TECHNOLOGIES CORPORATION 882, Oaza Ichige, Hitachinaka-sh, Ibaraki 04, 〒3128504, JP)
秋枝大介 (〒04 茨城県ひたちなか市大字市毛８８２番地　株式会社　日立ハイテクノロジーズ　那珂事業所内 Ibaraki, 〒3128504, JP)

Application Number:

JP2010/003506

Publication Date:

February 03, 2011

Filing Date:

May 26, 2010

Export Citation:

Click for automatic bibliography generation Help

Assignee:

HITACHI HIGH-TECHNOLOGIES CORPORATION (24-14, Nishi Shimbashi 1-chome Minato-k, Tokyo 17, 〒1058717, JP)
株式会社　日立ハイテクノロジーズ (〒17 東京都港区西新橋一丁目２４番１４号 Tokyo, 〒1058717, JP)
DEGUCHI, Kisaburo (HITACHI HIGH-TECHNOLOGIES CORPORATION 882, Oaza Ichige, Hitachinaka-sh, Ibaraki 04, 〒3128504, JP)
出口喜三郎 (〒04 茨城県ひたちなか市大字市毛８８２番地　株式会社　日立ハイテクノロジーズ　那珂事業所内 Ibaraki, 〒3128504, JP)
KAJI, Hironori (HITACHI HIGH-TECHNOLOGIES CORPORATION 882, Oaza Ichige, Hitachinaka-sh, Ibaraki 04, 〒3128504, JP)
加地弘典 (〒04 茨城県ひたちなか市大字市毛８８２番地　株式会社　日立ハイテクノロジーズ　那珂事業所内 Ibaraki, 〒3128504, JP)
ISHII, Kimihiko (HITACHI HIGH-TECHNOLOGIES CORPORATION 882, Oaza Ichige, Hitachinaka-sh, Ibaraki 04, 〒3128504, JP)
石井公彦 (〒04 茨城県ひたちなか市大字市毛８８２番地　株式会社　日立ハイテクノロジーズ　那珂事業所内 Ibaraki, 〒3128504, JP)
AKIEDA, Daisuke (HITACHI HIGH-TECHNOLOGIES CORPORATION 882, Oaza Ichige, Hitachinaka-sh, Ibaraki 04, 〒3128504, JP)

International Classes:

F04B49/10; F04B13/00; F04B23/06; F04B53/10; G01N30/32; G01N30/74; G01N30/84; F16K15/04; F16K37/00

Attorney, Agent or Firm:

INOUE, Manabu (6-1, Marunouchi 1-chome, Chiyoda-k, Tokyo 20, 〒1008220, JP)

Download PDF:

View/Download PDF PDF Help

Previous Patent: OBJECT DETECTION DEVICE FOR VEHICLE AND OBJECT DETECTION METHOD FOR VEHICLE

Next Patent: MANUFACTURING METHOD FOR LIGHT-GUIDING PLATE, LIGHT-GUIDING PLATE, BACKLIGHT DEVICE, LIGHTING DEVICE...