JPS55123001A - Hydraulic control circuit - Google Patents
Hydraulic control circuitInfo
- Publication number
- JPS55123001A JPS55123001A JP3022879A JP3022879A JPS55123001A JP S55123001 A JPS55123001 A JP S55123001A JP 3022879 A JP3022879 A JP 3022879A JP 3022879 A JP3022879 A JP 3022879A JP S55123001 A JPS55123001 A JP S55123001A
- Authority
- JP
- Japan
- Prior art keywords
- changeover
- valve
- changeover valve
- hydraulic
- state
- 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
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To prevent the fluctuation in the position of a controlled object due to changeover in a hydraulic controller for regulating the position by an electro- hydraulic servo valve, by eliminating pressure fluctuation in oil chambers on both the sides of a piston at the time of the changeover from the holding state of a hydraulic circuit to its control state.
CONSTITUTION: When the position of a stopper 6 for regulating the opening of a container 7 of continuous casting equipemnt is controlled, an unload changeover valve 2 is in a position (b) and a changeover valve 11 is in a position (a). The position control is effected by adjusting the degree of opening of a servo valve 3 depending on the difference between a command and the present position detected by a position detector 9. When the changeover valve 2 is shifted to a position (a) in that state, a pump 1 is unloaded and a holding circuit is formed. If a pressure fall takes place in the feed and drain ducts 12, 13 of a cylinder 5, a liquid is supplemented from an accumulator 15 through the changeover valve 11. As a result, no pressure fluctuation takes place in oil chambers 5b, 5c and the position of the stopper 6 is prevented from fluctuating.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3022879A JPS55123001A (en) | 1979-03-14 | 1979-03-14 | Hydraulic control circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3022879A JPS55123001A (en) | 1979-03-14 | 1979-03-14 | Hydraulic control circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55123001A true JPS55123001A (en) | 1980-09-22 |
Family
ID=12297847
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3022879A Pending JPS55123001A (en) | 1979-03-14 | 1979-03-14 | Hydraulic control circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55123001A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103486092A (en) * | 2013-09-14 | 2014-01-01 | 中国重型机械研究院股份公司 | Hydraulic stopper rod control system |
-
1979
- 1979-03-14 JP JP3022879A patent/JPS55123001A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103486092A (en) * | 2013-09-14 | 2014-01-01 | 中国重型机械研究院股份公司 | Hydraulic stopper rod control system |
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