CN103438040A - Hydraulic control device of high-pressure regulating valve - Google Patents
Hydraulic control device of high-pressure regulating valve Download PDFInfo
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- CN103438040A CN103438040A CN2013103646618A CN201310364661A CN103438040A CN 103438040 A CN103438040 A CN 103438040A CN 2013103646618 A CN2013103646618 A CN 2013103646618A CN 201310364661 A CN201310364661 A CN 201310364661A CN 103438040 A CN103438040 A CN 103438040A
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Abstract
The invention provides a hydraulic control device of a high-pressure regulating valve, and relates to the technical field of valves. The device aims to improve control precision. The device comprises a servo valve, a fast-closed electromagnetic valve, an actuating oil cylinder, a system oil supply opening and a system oil return opening. The actuating oil cylinder is provided with a displacement sensor, and a piston rod of the actuating oil cylinder is connected with an opening actuating mechanism of the high-pressure regulating valve. A pressure oil opening of the servo valve is connected with the system oil supply opening, an oil return opening of the servo valve is connected with the system oil return opening, and two work oil ports of the servo valve are connected with two work cavities of the actuating oil cylinder respectively. A pressure oil opening of the fast-closed electromagnetic valve is connected with the system oil supply opening, an oil return opening of the fast-closed electromagnetic valve is connected with system oil return opening, and two work oil ports of the fast-closed electromagnetic valve are connected with the two work cavities of the actuating oil cylinder respectively. The hydraulic control device is suitable for opening control of the high-pressure regulating valve of a steam turbine.
Description
Technical field
The present invention relates to the valve technology, particularly relate to a kind of technology of hydraulic control device of septum valve.
Background technique
Adopt steam turbine very extensive as the generator set application of power source.The valve of existing steam turbine all adopts group valve to carry the board-like leverage of borrowing to be connected with the oil engine of speed regulator, adopt secondary to amplify all-hydraulic mode and realize the steam turbine valve adjusting, regulator doubles as the tacho-pulse signal by the main oil pump be connected with the front-end of spindle axle sleeve, the through-flow pressure transducer is made the first order and is amplified, the cutout formula pilot valve of usining is controlled oil engine as amplifying for the second time, by the feedback window of oil engine, carries out hydraulic feedback.
The all-hydraulic control mode of existing steam turbine valve, exist continuous operating time long, and the low defect of control accuracy, can affect the security of operation of steam turbine, is difficult to guarantee the stability of generator set.
Summary of the invention
For the defect existed in above-mentioned prior art, it is short that technical problem to be solved by this invention is to provide a kind of continuous operating time, the hydraulic control device of the septum valve that control accuracy is high.
In order to solve the problems of the technologies described above, the hydraulic control device of a kind of septum valve provided by the present invention, the septum valve that relates to steam turbine, described septum valve is provided with for regulating the aperture actuator of aperture, it is characterized in that: this device comprises servovalve, quick closing valve solenoid valve, carries out oil cylinder, and is provided with system oil-feed port, system oil return mouth;
Described execution oil cylinder is the two-way cylinder of a single-piston rod bilateral oil-feed, carries out on oil cylinder the displacement transducer for detection of its piston rod displacement is housed, and the piston rod of carrying out oil cylinder is connected to the aperture actuator of septum valve through a connecting rod;
Described servovalve is a 3-position 4-way servovalve, servovalve has a pressure hydraulic fluid port, a return opening and two actuator ports, the pressure hydraulic fluid port of servovalve is received the system oil-feed port, servovalve return opening receive the system oil return mouth through a return check valve, an actuator port of servovalve is received the rod chamber of carrying out oil cylinder, and another actuator port of servovalve is received the rodless cavity of carrying out oil cylinder;
Described quick closing valve solenoid valve is a three position four-way electromagnetic valve, the quick closing valve solenoid valve has a pressure hydraulic fluid port, a return opening and two actuator ports, the pressure hydraulic fluid port of quick closing valve solenoid valve is received the system oil-feed port, the return opening of quick closing valve solenoid valve is received the system oil return mouth, an actuator port of quick closing valve solenoid valve is received the rod chamber of carrying out oil cylinder, and another actuator port of quick closing valve solenoid valve is received the rodless cavity of carrying out oil cylinder.
The hydraulic control device of septum valve provided by the invention, utilize servo valve control to carry out the oil cylinder operation, and adjust in real time servosignal by the feedback signal of displacement transducer, can accurately control the aperture of turbine high-pressure modulating valve, can also control by the quick closing valve solenoid valve that the turbine high-pressure modulating valve is opened fast, quick closedown, there is continuous operating time short, the characteristics that control accuracy is high, can improve the security of operation of steam turbine, improve the stability of generator set.
The accompanying drawing explanation
Fig. 1 is the plan view of hydraulic control device of the septum valve of the embodiment of the present invention;
Fig. 2 is the right elevation after the hydraulic control device of the septum valve of the embodiment of the present invention dissects along the A-A line in Fig. 1;
Fig. 3 is the hydraulic diagram of hydraulic control device of the septum valve of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing explanation, embodiments of the invention are described in further detail, but the present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar variation thereof, all should list protection scope of the present invention in.
As shown in Figure 1-Figure 3, the hydraulic control device of a kind of septum valve that the embodiment of the present invention provides, the septum valve that relates to steam turbine, described septum valve is provided with for regulating the aperture actuator (not shown) of aperture, it is characterized in that: this device comprises servovalve H1, quick closing valve solenoid valve H2, carries out oil cylinder U1, and is provided with system oil-feed port P1, system oil return mouth T1;
Described execution oil cylinder U1 is the two-way cylinder of a single-piston rod bilateral oil-feed, carries out on oil cylinder U1 the displacement transducer L1 for detection of its piston rod displacement is housed, and the piston rod of carrying out oil cylinder U1 is connected to the aperture actuator of septum valve through a connecting rod X1;
Described servovalve H1 is a 3-position 4-way servovalve, servovalve H1 has a pressure hydraulic fluid port, a return opening and two actuator ports, the pressure hydraulic fluid port of servovalve H1 is received system oil-feed port P1, servovalve H1 return opening receive system oil return mouth T1 through a return check valve H3, the actuator port of servovalve H1 is received the rod chamber of carrying out oil cylinder U1, and another actuator port of servovalve H1 is received the rodless cavity of carrying out oil cylinder U1;
Described quick closing valve solenoid valve H2 is a three position four-way electromagnetic valve, quick closing valve solenoid valve H2 has a pressure hydraulic fluid port, a return opening and two actuator ports, the pressure hydraulic fluid port of quick closing valve solenoid valve H2 is received system oil-feed port P1, the return opening of quick closing valve solenoid valve H2 is received system oil return mouth T1, the actuator port of quick closing valve solenoid valve H2 is received the rod chamber of carrying out oil cylinder U1, and another actuator port of quick closing valve solenoid valve H2 is received the rodless cavity of carrying out oil cylinder U1.
The working principle of the embodiment of the present invention is as follows:
The system oil-feed port P1 of hydraulic control device is received to the external high pressure oil sources, system oil return mouth T1 is received to outside oil returning tube;
While needing to regulate the aperture of turbine high-pressure modulating valve, feedback signal according to displacement transducer L1, input corresponding valve position difference servosignal to servovalve H1, servovalve H1 sends into high pressure oil according to valve position difference servosignal rod chamber or the rodless cavity of carrying out oil cylinder U1, make the piston rod of carrying out oil cylinder U1 retract or stretch out, and then drive the aperture actuator of septum valve to carry out corresponding actions, feedback signal according to displacement transducer L1 in adjustment process is constantly adjusted the valve position difference servosignal that is input to servovalve H1, until the feedback signal of displacement transducer L1 reaches desirable value, thereby realize the regulation of turbine high-pressure modulating valve,
When servovalve H1 loses the job signal (while there is no the input of valve position difference servosignal), because servovalve is provided with mechanical bias, on the home that the turbine high-pressure modulating valve can be parked in;
While needing the turbine high-pressure modulating valve to open fast, quick closing valve solenoid valve H2 obtains electric, now high pressure oil enters the rod chamber of carrying out oil cylinder U1 fast, make the piston rod fast retractile of carrying out oil cylinder, and then drive the aperture actuator of septum valve to carry out corresponding actions, make the turbine high-pressure modulating valve open fast;
While needing the quick closedown of turbine high-pressure modulating valve, quick closing valve solenoid valve H2 dead electricity, now high pressure oil enters the rodless cavity of carrying out oil cylinder U1 fast, make the piston rod of carrying out oil cylinder stretch out fast, and then drive the aperture actuator of septum valve to carry out corresponding actions, make the quick closedown of turbine high-pressure modulating valve.
Claims (1)
1. the hydraulic control device of a septum valve, the septum valve that relates to steam turbine, described septum valve is provided with for regulating the aperture actuator of aperture, it is characterized in that: this device comprises servovalve, quick closing valve solenoid valve, carries out oil cylinder, and is provided with system oil-feed port, system oil return mouth;
Described execution oil cylinder is the two-way cylinder of a single-piston rod bilateral oil-feed, carries out on oil cylinder the displacement transducer for detection of its piston rod displacement is housed, and the piston rod of carrying out oil cylinder is connected to the aperture actuator of septum valve through a connecting rod;
Described servovalve is a 3-position 4-way servovalve, servovalve has a pressure hydraulic fluid port, a return opening and two actuator ports, the pressure hydraulic fluid port of servovalve is received the system oil-feed port, servovalve return opening receive the system oil return mouth through a return check valve, an actuator port of servovalve is received the rod chamber of carrying out oil cylinder, and another actuator port of servovalve is received the rodless cavity of carrying out oil cylinder;
Described quick closing valve solenoid valve is a three position four-way electromagnetic valve, the quick closing valve solenoid valve has a pressure hydraulic fluid port, a return opening and two actuator ports, the pressure hydraulic fluid port of quick closing valve solenoid valve is received the system oil-feed port, the return opening of quick closing valve solenoid valve is received the system oil return mouth, an actuator port of quick closing valve solenoid valve is received the rod chamber of carrying out oil cylinder, and another actuator port of quick closing valve solenoid valve is received the rodless cavity of carrying out oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103646618A CN103438040A (en) | 2013-08-21 | 2013-08-21 | Hydraulic control device of high-pressure regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103646618A CN103438040A (en) | 2013-08-21 | 2013-08-21 | Hydraulic control device of high-pressure regulating valve |
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| Publication Number | Publication Date |
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| CN103438040A true CN103438040A (en) | 2013-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013103646618A Pending CN103438040A (en) | 2013-08-21 | 2013-08-21 | Hydraulic control device of high-pressure regulating valve |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5095804A (en) * | 1990-04-09 | 1992-03-17 | Asea Brown Boveri Ltd. | Drive for a steam servo valve |
| JPH08166816A (en) * | 1994-12-15 | 1996-06-25 | Ishikawajima Harima Heavy Ind Co Ltd | Fault diagnostic device for servo control system |
| CN201687533U (en) * | 2010-03-25 | 2010-12-29 | 德阳瑞能电力科技有限公司 | Steam turbine regulating valve control system |
| CN201786395U (en) * | 2010-09-20 | 2011-04-06 | 上海电气电站设备有限公司 | Oil servo motor of steam valve for steam turbine |
| CN102268497A (en) * | 2011-07-12 | 2011-12-07 | 西安陕鼓动力股份有限公司 | Safety control method for TRT (Blast Furnace Top Gas Recovery Turbine Unit) fixed blade servo control system |
| CN203420963U (en) * | 2013-08-21 | 2014-02-05 | 上海汇益控制***股份有限公司 | Hydraulic control device of septum valve |
-
2013
- 2013-08-21 CN CN2013103646618A patent/CN103438040A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5095804A (en) * | 1990-04-09 | 1992-03-17 | Asea Brown Boveri Ltd. | Drive for a steam servo valve |
| JPH08166816A (en) * | 1994-12-15 | 1996-06-25 | Ishikawajima Harima Heavy Ind Co Ltd | Fault diagnostic device for servo control system |
| CN201687533U (en) * | 2010-03-25 | 2010-12-29 | 德阳瑞能电力科技有限公司 | Steam turbine regulating valve control system |
| CN201786395U (en) * | 2010-09-20 | 2011-04-06 | 上海电气电站设备有限公司 | Oil servo motor of steam valve for steam turbine |
| CN102268497A (en) * | 2011-07-12 | 2011-12-07 | 西安陕鼓动力股份有限公司 | Safety control method for TRT (Blast Furnace Top Gas Recovery Turbine Unit) fixed blade servo control system |
| CN203420963U (en) * | 2013-08-21 | 2014-02-05 | 上海汇益控制***股份有限公司 | Hydraulic control device of septum valve |
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Application publication date: 20131211 |