JPS5747072A - Slow closing check valve - Google Patents
Slow closing check valveInfo
- Publication number
- JPS5747072A JPS5747072A JP12113980A JP12113980A JPS5747072A JP S5747072 A JPS5747072 A JP S5747072A JP 12113980 A JP12113980 A JP 12113980A JP 12113980 A JP12113980 A JP 12113980A JP S5747072 A JPS5747072 A JP S5747072A
- Authority
- JP
- Japan
- Prior art keywords
- valve body
- opened
- abnormal sound
- valve
- closing operation
- 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 generation of abnormal sound at the moment when the valve is almost closing, by releasing oil pressure of dash pot and making valve body quickly closed.
CONSTITUTION: When a pump stops suddenly, the valve body 9 closes at once, however, the valve body 8 closes slowly. At an early stage the by-pass valve 19 starts quick closing operation because all the orifices 14, 15 and 16 are opened, however, slowly down its closing speed on the way because only orifices 15 and 16 are opened. Then closing operation becomes further slower, because only orifice 16 is opened. However, when valve body 8 continues to close just before generating abnormal sound near the full closure, by-pass valve 19 is opened by a cam 21 and the valve body 8 is closed suddenly by releaving oil pressure in the dash pot 12. This arrangement eliminates the range of abnormal sound generation in the closing operation of valve body, resulting in preventing occurrence of abnormal sound.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12113980A JPS5747072A (en) | 1980-09-03 | 1980-09-03 | Slow closing check valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12113980A JPS5747072A (en) | 1980-09-03 | 1980-09-03 | Slow closing check valve |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5747072A true JPS5747072A (en) | 1982-03-17 |
Family
ID=14803827
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12113980A Pending JPS5747072A (en) | 1980-09-03 | 1980-09-03 | Slow closing check valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5747072A (en) |
-
1980
- 1980-09-03 JP JP12113980A patent/JPS5747072A/en active Pending
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