JPS57116987A - Pneumatic control valve - Google Patents
Pneumatic control valveInfo
- Publication number
- JPS57116987A JPS57116987A JP296181A JP296181A JPS57116987A JP S57116987 A JPS57116987 A JP S57116987A JP 296181 A JP296181 A JP 296181A JP 296181 A JP296181 A JP 296181A JP S57116987 A JPS57116987 A JP S57116987A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pumping
- preventive
- pneumatic control
- cylinder chamber
- 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.)
- Pending
Links
Landscapes
- Fluid-Driven Valves (AREA)
Abstract
PURPOSE: To reduce a trouble, arising from operating frequency increased in a pumping preventive valve, in a pneumatic control valve equipped with a safety device, by actuating a pumping preventive mechanism part only in emergency operation.
CONSTITUTION: At emergency operation in which breakers 36 are operated immediately after closing operation due to occurrence of a fault, air, flowing into a main air passage 8 from a spool valve 9 in a valve opening state, passes through a communication line 69 to flow into a cylinder chamber 68, press move a valve piece 67 and communicate a feed port 30 of a pumping preventive valve 29 to a communication pipe 70. Under this condition, when a trip coil 53 is excited by the break instruction, air from an accumulator 37 is fed into a cylinder chamber 32 to operate the pumping preventive valve 29.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP296181A JPS57116987A (en) | 1981-01-12 | 1981-01-12 | Pneumatic control valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP296181A JPS57116987A (en) | 1981-01-12 | 1981-01-12 | Pneumatic control valve |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57116987A true JPS57116987A (en) | 1982-07-21 |
Family
ID=11543957
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP296181A Pending JPS57116987A (en) | 1981-01-12 | 1981-01-12 | Pneumatic control valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57116987A (en) |
-
1981
- 1981-01-12 JP JP296181A patent/JPS57116987A/en active Pending
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