JPS5642768A - Swing-type automatic valve - Google Patents
Swing-type automatic valveInfo
- Publication number
- JPS5642768A JPS5642768A JP11749379A JP11749379A JPS5642768A JP S5642768 A JPS5642768 A JP S5642768A JP 11749379 A JP11749379 A JP 11749379A JP 11749379 A JP11749379 A JP 11749379A JP S5642768 A JPS5642768 A JP S5642768A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- closing
- time
- spring
- torsion spring
- 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
Abstract
PURPOSE: To prevent water hammering at the time of closing of a swing-type automatic valve such as the automatic valve of a reciprocating pump and hold down flow resistance at the time of closing of the valve, by setting an energizing force in a direction to close the valve, at a prescribed level in such a range that the closing is not delayed.
CONSTITUTION: A valve element 9 is pivoted by support arms 3a, 3b to a valve stem 5. A coiled torsion spring 7 is fitted on a sleeve 8 fitted on the valve steam 5. The horizontal part 7a of the coiled torsion spring 7 is wound left from the lower end of the spring to the central part of the valve stem 5 to thrust the valve element 9. The spring 7 is wound right upward from the central part of the valve stem 5 so that the spring has equal numbers of right and left turns around the valve stem. The moment of the coiled torsion spring 7 at the time of closing of the valve is set at a level which is not less than 30% of that for the valve at an opening angle of 30° and which is limited in within such a range that the closing of the valve is not delayed. As a result, water hammering due to closing lag is not caused at the time of closing of the valve and flow resistance is held down at the time of its opening.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11749379A JPS5642768A (en) | 1979-09-13 | 1979-09-13 | Swing-type automatic valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11749379A JPS5642768A (en) | 1979-09-13 | 1979-09-13 | Swing-type automatic valve |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5642768A true JPS5642768A (en) | 1981-04-21 |
Family
ID=14713083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11749379A Pending JPS5642768A (en) | 1979-09-13 | 1979-09-13 | Swing-type automatic valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5642768A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61190025U (en) * | 1985-05-18 | 1986-11-27 |
-
1979
- 1979-09-13 JP JP11749379A patent/JPS5642768A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61190025U (en) * | 1985-05-18 | 1986-11-27 |
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