CN217270592U - Guide vane action safety control system of hydraulic generator - Google Patents
Guide vane action safety control system of hydraulic generator Download PDFInfo
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- CN217270592U CN217270592U CN202220333823.6U CN202220333823U CN217270592U CN 217270592 U CN217270592 U CN 217270592U CN 202220333823 U CN202220333823 U CN 202220333823U CN 217270592 U CN217270592 U CN 217270592U
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- proportional valve
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The utility model provides a guide vane action safety control system of a hydraulic generator; the device comprises a PLC, wherein the input end of the PLC is respectively connected with a manual switch, a locking switch circuit and a servomotor control circuit, the output end of the PLC is connected with a proportional valve control circuit, the proportional valve control circuit is connected with a main control valve, and the main control valve controls the servomotor to open a movable guide vane; the utility model discloses in "lock spindle drops into" switch and "lock spindle is extracted" switch access PLC controller to realize the lock spindle shutting function under speed regulator "electricity manual" mode. When the speed regulator is in an 'electric manual' mode, the guide vane action is realized by setting the electric limit opening of the guide vane, so that the locking function of the locking spindle is realized by locking the limit opening of the guide vane.
Description
Technical Field
The utility model relates to a hydraulic generator stator action safety control system.
Background
At present, hydraulic ingot locking devices are commonly adopted by large and medium-sized hydraulic power plants at home and abroad as important equipment for preventing misoperation of guide vanes of unit servomotor. The locking device is usually installed beside a servomotor of a water wheel chamber unit and controls the switching of the locking through a hydraulic system. The hydraulic locking spindle is connected with the unit speed regulator through an oil pipeline, an electromagnetic valve is arranged in an oil pipeline system and can be used for manually controlling the throwing and retreating of the hydraulic locking spindle, a hydraulic signal is converted into an electrical signal by the electromagnetic valve, the electrical signal is sent to the speed regulator and then transmitted to a monitoring system, and the remote operation of throwing and retreating of the locking spindle can be realized in a central control room. A hydraulic locking ingot putting-in and putting-out signal indicator lamp is arranged on the speed regulator cabinet body, and the position state of the locking ingot can be monitored.
When the unit is shut down, the guide vane is in a fully-closed state, the hydraulic locking spindle is in an input state at the moment, if the movable guide vane needs to be operated, the hydraulic locking spindle is firstly switched to a pulled-out position, the hydraulic locking spindle can be switched on and off by manually operating a hydraulic locking spindle electromagnetic valve, and the switching-on and switching-off button can be clicked for remote operation in a central control room through monitoring system software. When the guide vane is operated, an operator can control the increase and decrease of the guide vane through an electric-manual mode of the speed regulator. When the unit is stopped, the hydraulic locking spindle is in the 'throw-in' position, and a 'locking spindle throw-in' indicator lamp on the speed regulator cabinet is on. At this time, the guide vane can be operated by pulling out the hydraulic locking ingot. Under many circumstances, because self error, operating personnel often just operate the stator under the condition that does not extract the hydraulic pressure lock spindle, and the speed regulator of the big-and-middle-sized hydraulic power plant at present many foreign countries does not control the function that the stator moved through the lock spindle shutting: namely, the guide vane can act no matter whether the hydraulic locking ingot is pulled out or not. If the locking ingot is not pulled out before the guide vane is operated by an operator, the hydraulic locking ingot can be damaged, so that serious economic loss and safety accidents are caused, and the safe and stable operation of the unit is seriously influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a hydraulic generator stator action safety control system.
The utility model discloses a following technical scheme can realize.
The utility model provides a guide vane action safety control system of a hydraulic generator; the device comprises a PLC, wherein the input end of the PLC is respectively connected with a manual switch, a locking switch circuit and a servomotor control circuit, the output end of the PLC is connected with a proportional valve control circuit, the proportional valve control circuit is connected with a main control valve, and the main control valve controls the servomotor to open a movable guide vane;
after the manual switch inputs a switch signal to the PLC through the isolation filter circuit, the PLC detects whether the hydraulic locking spindle is in a putting-in position or not through the locking spindle switch circuit, and when the hydraulic locking spindle is in a pulling-out state, the manual switch can control the proportional valve control circuit to control the servomotor to open the movable guide vane.
The isolation filter circuit comprises an optocoupler GD1 and an optocoupler GD2, the input ends of the optocoupler GD1 and the optocoupler GD2 are connected with a switching value signal of a manual switch, the output ends of the optocoupler GD1 and the optocoupler GD2 are respectively connected with an inductor L1 and an inductor L2 and respectively connected with a PLC (programmable logic controller), the other ends of the inductor L1 and the inductor L2 are connected in parallel and then connected with the anode of a diode D1 and connected with the PLC, and the cathode of the diode is connected with a proportional valve control circuit.
Proportional valve control circuit includes proportional valve controller U1, proportional valve controller U1's power end in proper order with relay contact J10, relay contact J1 is connected the back and is connected with +24V power, its output is connected with proportional valve coil and PLC controller, its signal feedback end is connected with sensor and PLC controller on the proportional valve, its signal input part respectively with relay contact J2, relay contact J3, locking spindle switch circuit connection, relay contact J3 is connected with switch J7, switch J7 is connected with inductance L3, inductance L3 is connected with the PLC controller.
The locking switch circuit comprises a locking pulling-out switch J4 and a locking throwing switch J6, one end of the locking pulling-out switch J4 and one end of the locking throwing switch J6 are both connected with a proportional valve controller, and the locking pulling-out switch J4 is connected with a proportional valve change-over switch J5
The beneficial effects of the utility model reside in that: the 'locking ingot throw-in' switch and the 'locking ingot pull-out' switch are connected into the PLC, so that the locking ingot locking function of the speed regulator in the 'electric manual' mode is realized. When the speed regulator is in an 'electric manual' mode, the guide vane action is realized by setting the electric limit opening of the guide vane, so that the locking function of the locking spindle is realized by locking the limit opening of the guide vane.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
fig. 2 is a schematic diagram of the electric control principle of the present invention.
Detailed Description
The technical solutions of the present invention are further described below, but the scope of protection claimed is not limited to the described ones.
A hydraulic generator guide vane action safety control system; the control system comprises a PLC, wherein the input end of the PLC is respectively connected with a manual switch, a locking switch circuit and a servomotor control circuit, the output end of the PLC is connected with a proportional valve control circuit, the proportional valve control circuit is connected with a main control valve, and the main control valve controls the servomotor to open a movable guide vane;
after the manual switch inputs a switch signal to the PLC through the isolation filter circuit, the PLC detects whether the hydraulic locking spindle is in a putting-in position or not through the locking spindle switch circuit, and when the hydraulic locking spindle is in a pulling-out state, the manual switch can control the proportional valve control circuit to control the servomotor to open the movable guide vane. A hydraulic locking control switch circuit in the electric manual mode of the speed regulator is connected to a PLC controller, and when the controller detects that the hydraulic locking is in a pulling-out state, the controller allows the proportional valve to control the liquid guiding action.
Further, after the electric manual signal is isolated, amplified and converted through an optical coupler GD1 and an optical coupler GD2 in the isolation filter circuit, the electric manual signal is input to the proportional valve control circuit through a diode D1 after being subjected to inductive filtering and shaping, and the PLC receives switching value signals at the front ends of an inductor L1 and an inductor L2 simultaneously.
Further, the proportional valve control circuit controls the proportional valve through the proportional valve controller U1, the output end of the proportional valve coil is simultaneously connected with the proportional valve coil and the PLC controller, the connection end of the proportional valve coil and the sensor on the proportional valve are simultaneously connected with the PLC controller, the PLC controller can receive an opening signal of the proportional valve, the signal input end of the proportional valve is respectively connected with the relay contact J2 and the relay contact J3, the relay contact J3 is a normally open contact, when the PLC controller receives a switching value signal, the switching value signal is disconnected, the switching value signal is prevented from being input into the proportional valve, the proportional valve is closed after the PLC controller detects that the locking ingot is in a pulling-out state, the front end of the proportional valve is connected with the switch J7, the switch J7 is a no-load switch of the speed regulator, the front end of the switch J7 is connected with the PLC control signal to control the proportional valve controller, and the power supply end of the proportional valve controller U1 is sequentially connected with the relay contact J10, the relay contact, The relay contact J1 is connected with a +24V power supply, the relay contact J10 and the relay contact J1 are respectively a shutdown switch and an interlocking contact of a cut-off speed regulator when the opening degree of a guide vane is less than 5%, and the power supply of the proportional valve is cut off when the proportional valve is shut down and the opening degree of the guide vane is less than 5%, so that the proportional valve is prevented from acting.
The locking switch circuit comprises a locking pulling switch J4 and a locking input switch J6, one end of the locking pulling switch J4 and one end of the locking input switch J6 are both connected with the proportional valve controller, and the locking input signal and the locking pulling signal are both switching value signals and only have two states of '0' and '1'. When the control output is 0, judging that the logic is not, namely not acting; when the control output is "1", the determination logic is "and", that is, the operation lock/release switch J4 is connected to the proportional valve switching switch J5.
Claims (4)
1. The utility model provides a hydraulic generator stator action safety control system which characterized in that: the device comprises a PLC, wherein the input end of the PLC is respectively connected with a manual switch, a locking switch circuit and a servomotor control circuit, the output end of the PLC is connected with a proportional valve control circuit, the proportional valve control circuit is connected with a main control valve, and the main control valve controls the servomotor to open a movable guide vane;
after the manual switch inputs a switch signal to the PLC through the isolation filter circuit, the PLC detects whether the hydraulic locking spindle is in a putting-in position or not through the locking spindle switch circuit, and when the hydraulic locking spindle is in a pulling-out state, the manual switch can control the proportional valve control circuit to control the servomotor to open the movable guide vane.
2. The hydro-generator vane action safety control system of claim 1, characterized in that: the isolation filter circuit comprises an optocoupler GD1 and an optocoupler GD2, the input ends of the optocoupler GD1 and the optocoupler GD2 are connected with a switching value signal of a manual switch, the output ends of the optocoupler GD1 and the optocoupler GD2 are respectively connected with an inductor L1 and an inductor L2 and respectively connected with a PLC (programmable logic controller), the other ends of the inductor L1 and the inductor L2 are connected in parallel and then connected with the anode of a diode D1 and connected with the PLC, and the cathode of the diode is connected with a proportional valve control circuit.
3. The hydro-generator vane action safety control system of claim 1, characterized in that: proportional valve control circuit includes proportional valve controller U1, proportional valve controller U1's power end in proper order with relay contact J10, relay contact J1 is connected the back and is connected with +24V power, its output is connected with proportional valve coil and PLC controller, its signal feedback end is connected with sensor and PLC controller on the proportional valve, its signal input part respectively with relay contact J2, relay contact J3, locking spindle switch circuit connection, relay contact J3 is connected with switch J7, switch J7 is connected with inductance L3, inductance L3 is connected with the PLC controller.
4. The hydro-generator vane action safety control system of claim 1, characterized in that: the locking switch circuit comprises a locking pulling-out switch J4 and a locking throwing switch J6, one end of the locking pulling-out switch J4 and one end of the locking throwing switch J6 are both connected with a proportional valve controller, and the locking pulling-out switch J4 is connected with a proportional valve change-over switch J5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220333823.6U CN217270592U (en) | 2022-02-18 | 2022-02-18 | Guide vane action safety control system of hydraulic generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220333823.6U CN217270592U (en) | 2022-02-18 | 2022-02-18 | Guide vane action safety control system of hydraulic generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217270592U true CN217270592U (en) | 2022-08-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220333823.6U Active CN217270592U (en) | 2022-02-18 | 2022-02-18 | Guide vane action safety control system of hydraulic generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217270592U (en) |
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2022
- 2022-02-18 CN CN202220333823.6U patent/CN217270592U/en active Active
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