JPS57172184A - Controller of butterfly valve at outlet of condenser - Google Patents
Controller of butterfly valve at outlet of condenserInfo
- Publication number
- JPS57172184A JPS57172184A JP5566881A JP5566881A JPS57172184A JP S57172184 A JPS57172184 A JP S57172184A JP 5566881 A JP5566881 A JP 5566881A JP 5566881 A JP5566881 A JP 5566881A JP S57172184 A JPS57172184 A JP S57172184A
- Authority
- JP
- Japan
- Prior art keywords
- limit
- butterfly valve
- signal
- syphon
- height
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B11/00—Controlling arrangements with features specially adapted for condensers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Water Turbines (AREA)
- Details Of Valves (AREA)
Abstract
PURPOSE:To prevent a hunting and a water hammer phenomena resulting from a maloperation by setting a limit syphon height in a negative pressure area of a necessary syphon height so that a butterfly valve is caused not to be opened at a syphon height above its limit. CONSTITUTION:A necessary opening of a butterfly valve 4 is computed from a signal of an opening detector 25 of a circulation pump 1 through arithmetic units 27 and 28, a valve opening corresponding to a limit syphon height is computed by adding a signal of a function generator 30 at an adding machine 29, and a deviation from a signal of the opening detector 25 is obtained by a comparator 31. And when the deviation deviated from a blind sector set on a blind sector circuit 32 is turned into the one exceeding a predetermind value, as this means that an operational negative pressure at an outlet water chamber 7 has become identical with a limit syphon height, this device is made to apply a closing operation signal to the butterfly valve 4 from a valve driving gear 33. With this, safety is improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5566881A JPS57172184A (en) | 1981-04-15 | 1981-04-15 | Controller of butterfly valve at outlet of condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5566881A JPS57172184A (en) | 1981-04-15 | 1981-04-15 | Controller of butterfly valve at outlet of condenser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57172184A true JPS57172184A (en) | 1982-10-22 |
| JPS6248799B2 JPS6248799B2 (en) | 1987-10-15 |
Family
ID=13005233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5566881A Granted JPS57172184A (en) | 1981-04-15 | 1981-04-15 | Controller of butterfly valve at outlet of condenser |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57172184A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63131098U (en) * | 1987-02-20 | 1988-08-26 | ||
| JPS63131099U (en) * | 1987-02-20 | 1988-08-26 |
-
1981
- 1981-04-15 JP JP5566881A patent/JPS57172184A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6248799B2 (en) | 1987-10-15 |
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