JPS576166A - Buffer for swing type check valve - Google Patents
Buffer for swing type check valveInfo
- 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
Links
Landscapes
- 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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63119976U (en) * | 1987-01-28 | 1988-08-03 |
-
1980
- 1980-06-13 JP JP8052580A patent/JPS576166A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63119976U (en) * | 1987-01-28 | 1988-08-03 |
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