JPS576166A - Buffer for swing type check valve - Google Patents

Buffer for swing type check valve

Info

Publication number
JPS576166A
JPS576166A JP8052580A JP8052580A JPS576166A JP S576166 A JPS576166 A JP S576166A JP 8052580 A JP8052580 A JP 8052580A JP 8052580 A JP8052580 A JP 8052580A JP S576166 A JPS576166 A JP S576166A
Authority
JP
Japan
Prior art keywords
valve
rotor
slowly
moves
opening
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
JP8052580A
Other languages
Japanese (ja)
Inventor
Sadayuki Nakanishi
Akio Fukunaga
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel 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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP8052580A priority Critical patent/JPS576166A/en
Publication of JPS576166A publication Critical patent/JPS576166A/en
Pending legal-status Critical Current

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  • Check Valves (AREA)

Abstract

PURPOSE: To prevent damage of a valve seat by quickly operating a swing valve with braking off in the initial stage of closing motion of the valve and slowly operating the valve with liquid braking on in the last period of the motion.
CONSTITUTION: A rotor 30 secured on a small diameter portion 2a of a movable shaft 2 of a swing valve is movably mounted in a cylinder 16 of a buffer 11. The rotor 30 and a fixed plate 25 form an upper chamber R1 and a lower chamber R2 where a two-phase fluid consisting of liquid and gas is enclosed. A path connecting an opening 35a on an opening 35b is provided with a flow rate control valve. When the swing valve operates from a position of opening to its full width to a closing direction, the rotor 30 moves clockwise. Since at the start only the gas in the lower chamber R2 flows into the upper chamber R1, the rotor moves quickly, and since at the middle the liquid of the lower chamber R2 begins to flow in the path connecting a path 50 to the openings 35a, 35b, it moves slowly. A further movement of the rotor 30 blocks up the path 50, so that it moves more slowly and the swing valve closes slowly.
COPYRIGHT: (C)1982,JPO&Japio
JP8052580A 1980-06-13 1980-06-13 Buffer for swing type check valve Pending JPS576166A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8052580A JPS576166A (en) 1980-06-13 1980-06-13 Buffer for swing type check valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8052580A JPS576166A (en) 1980-06-13 1980-06-13 Buffer for swing type check valve

Publications (1)

Publication Number Publication Date
JPS576166A true JPS576166A (en) 1982-01-13

Family

ID=13720730

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8052580A Pending JPS576166A (en) 1980-06-13 1980-06-13 Buffer for swing type check valve

Country Status (1)

Country Link
JP (1) JPS576166A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63119976U (en) * 1987-01-28 1988-08-03

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63119976U (en) * 1987-01-28 1988-08-03

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