JPS56113876A - Device for opening and closing shutoff valve - Google Patents
Device for opening and closing shutoff valveInfo
- Publication number
- JPS56113876A JPS56113876A JP1447880A JP1447880A JPS56113876A JP S56113876 A JPS56113876 A JP S56113876A JP 1447880 A JP1447880 A JP 1447880A JP 1447880 A JP1447880 A JP 1447880A JP S56113876 A JPS56113876 A JP S56113876A
- Authority
- JP
- Japan
- Prior art keywords
- shutoff valve
- switch
- cylinder
- piston
- overcurrent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Fluid-Driven Valves (AREA)
Abstract
PURPOSE: To safely prevent an overcurrent from flowing through a hydraulic pump, by providing a pressure switch and a detection switch for detecting the rotation of an arm and by stopping a motor through the pressure switch when the detection switch is defective.
CONSTITUTION: Oil in the piston chamber C1 of a cylinder 4 and the piston cylinder C3 of another cylinder 5 flows into a housing 2a. When a rod 43 is moved rightward and a shutoff valve is fully opened, a switch 7 for detecting the rotational position of an arm 60 is opened to stop a motor to keep the shutoff valve open. When electric power is cut off, relief valves 82, 92, 93 are deenergized so that the relief valves 82, 92, 93 are fully opened, oil in piston chambers C4, C2 flows into the housing 2a and the piston chamber C1, C3 and pistons 42, 52 close the shutoff valve by the thrusting force of a spring 44. According to this constitution, an overcurrent is safely prevented from flowing through a hydraulic pump.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1447880A JPS56113876A (en) | 1980-02-08 | 1980-02-08 | Device for opening and closing shutoff valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1447880A JPS56113876A (en) | 1980-02-08 | 1980-02-08 | Device for opening and closing shutoff valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56113876A true JPS56113876A (en) | 1981-09-08 |
JPS634075B2 JPS634075B2 (en) | 1988-01-27 |
Family
ID=11862161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1447880A Granted JPS56113876A (en) | 1980-02-08 | 1980-02-08 | Device for opening and closing shutoff valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56113876A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6467364B1 (en) * | 1997-12-10 | 2002-10-22 | Ksb S.A. | Coupling apparatus for rotating a rotatable part with a movable slide |
JP2009243500A (en) * | 2008-03-28 | 2009-10-22 | Tyco Flow Control Japan Kk | Emergency shut-down valve device |
JP2009243499A (en) * | 2008-03-28 | 2009-10-22 | Tyco Flow Control Japan Kk | Emergency shut-down valve device |
JP2013127291A (en) * | 2011-12-19 | 2013-06-27 | Tix Iks Corp | Scotch yoke type operation device |
-
1980
- 1980-02-08 JP JP1447880A patent/JPS56113876A/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6467364B1 (en) * | 1997-12-10 | 2002-10-22 | Ksb S.A. | Coupling apparatus for rotating a rotatable part with a movable slide |
JP2009243500A (en) * | 2008-03-28 | 2009-10-22 | Tyco Flow Control Japan Kk | Emergency shut-down valve device |
JP2009243499A (en) * | 2008-03-28 | 2009-10-22 | Tyco Flow Control Japan Kk | Emergency shut-down valve device |
JP2013127291A (en) * | 2011-12-19 | 2013-06-27 | Tix Iks Corp | Scotch yoke type operation device |
Also Published As
Publication number | Publication date |
---|---|
JPS634075B2 (en) | 1988-01-27 |
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