JPS54153901A - Boiler water feeding flow-rate controlling apparatus - Google Patents
Boiler water feeding flow-rate controlling apparatusInfo
- Publication number
- JPS54153901A JPS54153901A JP6223378A JP6223378A JPS54153901A JP S54153901 A JPS54153901 A JP S54153901A JP 6223378 A JP6223378 A JP 6223378A JP 6223378 A JP6223378 A JP 6223378A JP S54153901 A JPS54153901 A JP S54153901A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- water feeding
- control
- relay
- switching
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract 9
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Abstract
PURPOSE: To control the amount of supplied water in low loading and to perform the control of flow-rate in high loading by controlling the rotation frequency of a pump, with a valve perfectly opened which is arranged in parallel with a water feeding control valve, and to automatically carry out the switching free of the fluctuation of supplied water flow-rate.
CONSTITUTION: With the loading 50% or more, a switching relay 14 is turned a → b, and a switching relay 8 is turned c → d. The plus deviation signal which passes through a P + I calculator 9 pefectly opens a water feeding control valve 20. When the perfect opening of the water feeding valve 20 is confirmed, an electric discharge valve 21 is switched to perfect opening from perfect closing. When the load becomes 50% or less, the electic discharge valve 21 is perfectly closed. Then, the switching relay 8 is turned b → a. The minus deviation signal perfectly closes the water feeding valve 20. As the water feeding valve 20 closes gradually, the rotation frequency control loop allows the BFP exit pressure to rise to control the flow rate. When the BFP exit pressure reaches a prescribed value, a monitor relay 15 operates to switch the switching relay 8 from a to c, and the switch relay 14 from b to a. Through automatic switching operation, the amount of supplied water to a boiler can be kept constant.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6223378A JPS54153901A (en) | 1978-05-26 | 1978-05-26 | Boiler water feeding flow-rate controlling apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6223378A JPS54153901A (en) | 1978-05-26 | 1978-05-26 | Boiler water feeding flow-rate controlling apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54153901A true JPS54153901A (en) | 1979-12-04 |
Family
ID=13194228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6223378A Pending JPS54153901A (en) | 1978-05-26 | 1978-05-26 | Boiler water feeding flow-rate controlling apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54153901A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62299604A (en) * | 1986-06-20 | 1987-12-26 | 株式会社東芝 | Boiler feedwater controller |
| JPH0553968U (en) * | 1991-12-25 | 1993-07-20 | 沖電気工業株式会社 | High speed line printer |
-
1978
- 1978-05-26 JP JP6223378A patent/JPS54153901A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62299604A (en) * | 1986-06-20 | 1987-12-26 | 株式会社東芝 | Boiler feedwater controller |
| JPH0553968U (en) * | 1991-12-25 | 1993-07-20 | 沖電気工業株式会社 | High speed line printer |
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