JPS57116987A - Pneumatic control valve - Google Patents

Pneumatic control valve

Info

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
Application number
JP296181A
Other languages
Japanese (ja)
Inventor
Ryoichi Nakanishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
Original Assignee
Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Meidensha Corp, Meidensha Electric Manufacturing Co Ltd filed Critical Meidensha Corp
Priority to JP296181A priority Critical patent/JPS57116987A/en
Publication of JPS57116987A publication Critical patent/JPS57116987A/en
Pending legal-status Critical Current

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
JP296181A 1981-01-12 1981-01-12 Pneumatic control valve Pending JPS57116987A (en)

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)

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