CN209067589U - A kind of generating set and its steam turbine interdiction early warning system - Google Patents
A kind of generating set and its steam turbine interdiction early warning system Download PDFInfo
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- CN209067589U CN209067589U CN201821961827.9U CN201821961827U CN209067589U CN 209067589 U CN209067589 U CN 209067589U CN 201821961827 U CN201821961827 U CN 201821961827U CN 209067589 U CN209067589 U CN 209067589U
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- 230000000903 blocking effect Effects 0.000 claims abstract description 11
- 238000012544 monitoring process Methods 0.000 claims description 18
- 239000002828 fuel tank Substances 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 230
- 238000010586 diagram Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000013024 troubleshooting Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
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- 239000000446 fuel Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The utility model discloses a kind of steam turbine interdiction early warning system of generating set, including main oil pump, servo reversing valve, inserted valve, pilot control valve, oil pressure monitor, DCS controller, oil motor；Main oil pump is connected to the oil inlet of servo reversing valve, and the first actuator port is connected to the right chamber oil inlet of the oil inlet of inserted valve and oil motor, and the oil outlet of inserted valve is connected to the left chamber oil inlet of oil motor；Main oil pump is connected to the oil inlet of pilot control valve, and actuator port is connected to the control port of inserted valve, and oil pressure monitor is used to monitor the control port oil pressure of inserted valve；DCS controller is used to control the working condition of pilot control valve, and when the oil pressure monitored is lower than safe oil pressure is preset, control servo reversing valve makes it work in second station.The utility model can advance preventing unit valve control Safety oil leakage, know Safety oil leakage situation, avoid occur blocking situation.A kind of generating set is also disclosed in the utility model, and its advantages are as described above.
Description
Technical field
The utility model relates to technical field of electric power, in particular to the steam turbine interdiction early warning system of a kind of generating set.
The utility model further relates to a kind of generating set including above-mentioned steam turbine interdiction early warning system.
Background technique
With the development of China Power technology, more and more power equipments have been used widely.
Supercritical turbine group is a kind of advanced generating equipment, and oil circuit design is rigorous, brief, is come from oil supply system
Pressure oil be divided into two-way after the filter, arrive quick closing valve solenoid valve all the way, arrive electrohydraulic servo valve all the way.Quick closing valve solenoid valve totally two
Only, receive the signal of Protection System of Turbin.Solenoid valve is electriferous state, power loss late gate quick closing valve when normal work.When fast
After powered-down magnet valve receives the signal power loss of protection system, the Safety oil for controlling inserted valve is connected into oil return, opens inserted valve.
It since inserted valve lower part is connected to the left and right chamber of oil cylinder piston, is connected with oil return, piston moves rapidly under spring force
Make closing valve.Electrohydraulic servo valve receives the electric signal that control system is come, and pressure oil is switched to oil cylinder as needed and opens valve
Door, control system receives the position feed back signal of valve and the command signal of valve position compares, and issues instructions to electrohydraulic servo valve,
To which accurately valve be controlled in required aperture.
When the leakage of any group of valve valve wall or quick closing valve solenoid valve bite in two groups of inserted valves of quick closing valve system or oil circuit blocking,
The safe oil pressure in inserted valve top is caused to be unable to maintain that, inserted valve is opened, and oil motor oil inlet oil circuit is directly connected with oil return line, valve
Door is gradually closed, and servo valve instruction feedback deviation is big, leads to EH oil system P (pressure) hydraulic fluid port and servo valve A hydraulic fluid port constant conduction,
EH oil pressure continues to decline, so as to cause blocking.
In the prior art, perfect to having been carried out in the DCS system control logic of Steam Turbine, EH oil system pressure is believed
Number introduce control logic, logical design are as follows: when DCS system detects the feelings of the large and fast powered-down magnet valve of servo valve deviation not power loss
Under condition, EH oil main pipe oil pressure drops to certain value, then carries out instruction clearing to abnormal valve, avoids servo valve oil inlet and returns
Oily constant conduction, prevents steam turbine interdiction.However, though the logic improvement of such pair of DCS system can be solved to a certain extent because inserting
Fill the pressure drop of valve Safety oil it is low caused by failure occur, but a kind of passively subsequent settling mode, cannot play prevention in advance,
The effect of real time monitoring.
Therefore, how advance preventing unit valve control Safety oil leaks, and knows Safety oil leakage situation in real time, avoids vapour
Blocking situation occurs for turbine, is those skilled in the art's technical problem urgently to be resolved.
Utility model content
The purpose of the utility model is to provide a kind of steam turbine interdiction early warning systems of generating set, being capable of advance preventing machine
Group valve control Safety oil leakage, knows Safety oil leakage situation in real time, avoids steam turbine that blocking situation occurs.The utility model
Another object be to provide a kind of generating set including above-mentioned steam turbine interdiction early warning system.
In order to solve the above technical problems, the utility model provides a kind of steam turbine interdiction early warning system of generating set, packet
Include main oil pump, servo reversing valve, inserted valve, pilot control valve, oil pressure monitor, DCS controller, oil motor；
The oil outlet of the main oil pump is connected to the oil inlet of the servo reversing valve, the first work of the servo reversing valve
Make hydraulic fluid port to be connected to the right chamber oil inlet of the oil inlet of the inserted valve and the oil motor simultaneously, the oil outlet of the inserted valve
It is connected to the left chamber oil inlet of the oil motor, the oil return opening of the oil motor is set to its left chamber, and time of the oil motor
Hydraulic fluid port is connected to fuel tank；
When the servo reversing valve is in the first station, oil inlet is connected with its first actuator port, and the servo is changed
When being in second station to valve, oil inlet and its first actuator port end；
The oil outlet of the main oil pump is connected to the oil inlet of the pilot control valve simultaneously, the work of the pilot control valve
Make hydraulic fluid port to be connected to the control port of the inserted valve, the oil pressure monitor is used to monitor the control port oil of the inserted valve
It presses and monitoring data is sent to the DCS controller；
When the pilot control valve is in the first station, actuator port is connected with its oil inlet, the pilot control valve
When in second station, actuator port is connected with fuel tank；
The DCS controller is used to control the working condition of the pilot control valve, and monitors in the oil pressure monitor
To oil pressure lower than preset safe oil pressure when, controlling the servo reversing valve makes it work in second station.
It preferably, further include the auxiliary oil pump being connected to the oil outlet of the main oil pump, and the auxiliary oil pump and the DCS are controlled
Device signal connection processed, when the oil pressure that the oil pressure monitor monitors is lower than safe oil pressure is preset, the DCS controller control
The auxiliary oil pump operation.
It preferably, further include the oil inlet oil being connect with the DCS controller signals, for monitoring the servo reversing valve
The pressure transmitter of pressure.
Preferably, the servo reversing valve is specially O-shaped Median Function 3-position 4-way electro-hydraulic reversing valve.
It preferably, further include being connect with the control end signal of the DCS controller and the servo reversing valve, for basis
The control instruction of the DCS controller controls the servo card of the oil inlet valve aperture of the servo reversing valve.
It preferably, further include the flexible stroke of piston being connect with the DCS controller signals, for monitoring the oil motor
Displacement monitors, and the control instruction that is formed after the monitoring data of the displacement monitors are to DCS controller feedback
And when the present instruction deviation of the servo card is greater than default blocking safety value, finger of the DCS controller to the servo card
It enables and resetting, so that the servo reversing valve works in second station.
It preferably, further include the oil pressure being connect with the DCS controller signals, for being monitored in the oil pressure monitor
Lower than the alarm sounded an alarm when presetting safe oil pressure.
It preferably, further include being connect with the DCS controller signals, for monitoring low oil pressure in the oil pressure monitor
The display of the encoded information of the inserted valve and the corresponding pilot control valve is shown when presetting safe oil pressure.
It preferably, further include being connect with the DCS controller signals, for monitoring low oil pressure in the oil pressure monitor
The valve body crack of the inserted valve is sealed when presetting safe oil pressure and/or the hydraulic fluid port of the pilot control valve is carried out
The executing agency of impurity cleaning.
The utility model also provides a kind of generating set, including steam turbine interdiction early warning as described in any one of the above embodiments system
System.
The steam turbine interdiction early warning system of generating set provided by the utility model is mainly changed including main oil pump, servo
To valve, inserted valve, pilot control valve, oil pressure monitor, DCS controller, oil motor.Wherein, the oil outlet and servo of main oil pump
The oil inlet of reversal valve is connected to, and the first actuator port of servo reversing valve be connected to the oil inlet of inserted valve all the way, another way and
The right chamber oil inlet of oil motor is connected to.And the oil outlet of inserted valve is connected to the left chamber oil inlet of oil motor, while oil motor
Oil return opening is also disposed in its left chamber, and oil return opening is connected to fuel tank.Oil pressure monitor is used to monitor the control port of inserted valve
Oil pressure, while being connect with DCS controller signals.Pilot control valve is used to realize by the working condition switching of itself to inserting
The switch control of valve, and the switching of the working condition of pilot control valve itself is controlled by DCS controller, specifically, main oil pump goes out
Hydraulic fluid port is connected to the oil inlet of pilot control valve, and the actuator port of pilot control valve is connected to the control port of inserted valve.?
Under normal operating conditions, servo reversing valve is in the first station, and oil inlet is connected with its first actuator port, and further with
The right chamber oil inlet of oil motor is connected, and oil motor operates normally.At this point, DCS controller control pilot control valve is in the first work
Position, oil inlet is connected with actuator port, so that the control port pressure maintaining of inserted valve, inserted valve remain turned-off.And work as inserted valve
Valve wall when rupturing, the oil pressure of control port gradually decreases, when oil pressure monitor detects the oil pressure drop of control port
When as low as presetting safe oil pressure, triggering DCS controller generates corresponding control instruction to servo reversing valve, so that servo reversing valve is vertical
It is switched to second station, at this point, the oil inlet of servo reversing valve and its first actuator port end, pressure oil can not be by inserting
The oil inlet and outlet of dress valve reaches in the left chamber oil inlet of oil motor, and then the oil return opening for avoiding pressure oil from directly passing through oil motor is held
Afterflow returns to fuel tank, prevents steam turbine from interdicting.In conclusion steam turbine interdiction early warning provided by the utility model system
System monitors the oil pressure of inserted valve control port by oil pressure monitor, occurs the of Safety oil leakage situation in inserting valve body
One time can be fed back to DCS controller, then switch its work by control instruction of the DCS controller to servo reversing valve
State avoids pressure oil from directly flowing back to fuel tank from the oil return opening of oil motor, prevents steamer so that the pressure oil of main oil pump is ended
Machine interdicts, and compared with the prior art, the control logic of DCS controller is improved to insert by EH main pipe oil pressure feedback control
Valve controls oil pressure relief oil pressure feedforward control, realizes preventive effect.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is a kind of hydraulic structure schematic diagram of specific embodiment provided by the utility model.
Wherein, in Fig. 1:
Main oil pump -1, servo reversing valve -2, inserted valve -3, pilot control valve -4, the control of oil pressure monitor -5, DCS
Device -6, oil motor -7, auxiliary oil pump -8, pressure transmitter -9, servo card -10, displacement monitors -11, alarm -12,
Display -13, executing agency -14.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Referring to FIG. 1, Fig. 1 is a kind of hydraulic structure schematic diagram (its of specific embodiment provided by the utility model
Middle solid line indicates that oil circuit, dotted line indicate channel).
In a kind of specific embodiment provided by the utility model, the steam turbine interdiction early warning system master of generating set
It to include main oil pump 1, servo reversing valve 2, inserted valve 3, pilot control valve 4, oil pressure monitor 5, DCS controller 6, oil motor 7.
Wherein, the oil inlet (diagram P) of the oil outlet of main oil pump 1 and servo reversing valve 2 is connected to, and the of servo reversing valve 2
One actuator port (diagram A) is connected to the oil inlet of inserted valve 3 all the way, and another way is connected to the right chamber oil inlet of oil motor 7.And
The oil outlet of inserted valve 3 is connected to the left chamber oil inlet of oil motor 7, while the oil return opening of oil motor 7 is also disposed in its left chamber,
Its oil return opening is connected to fuel tank.Oil pressure monitor 5 be used for monitor inserted valve 3 control port oil pressure, while with DCS controller
The connection of 6 signals.
Pilot control valve 4 is used to realize the switch control to inserted valve 3 by the working condition switching of itself, and guide is controlled
The working condition switching of valve 4 processed itself is controlled by DCS controller 6, specifically, the oil outlet of main oil pump 1 and pilot control valve 4
Oil inlet (diagram P) connection, and the actuator port (diagram A) of pilot control valve 4 is connected to the control port of inserted valve 3.
In normal operation, servo reversing valve 2 is in the first station, and oil inlet is led with its first actuator port
It is logical, and be further connected with the right chamber oil inlet of oil motor 7, oil motor 7 operates normally.At this point, DCS controller 6 controls guide
Control valve 4 is in the first station, and oil inlet is connected with actuator port, so that the control port pressure maintaining of inserted valve 3, inserted valve 3
It remains off.
And when the valve wall of inserted valve 3 ruptures, the oil pressure of control port gradually decreases, when oil pressure monitor 5 is examined
The oil pressure for measuring control port is reduced to when presetting safe oil pressure, and triggering DCS controller 6 generates corresponding control to servo reversing valve 2
System instruction, so that servo reversing valve 2 is switched to second station immediately, at this point, the oil inlet of servo reversing valve 2 and its first work
Hydraulic fluid port cut-off, pressure oil can not be reached in the left chamber oil inlet of oil motor 7 by the oil inlet and outlet of inserted valve 3, and then avoid pressing
Power oil directly persistently flow back into fuel tank by the oil return opening of oil motor 7, prevents steam turbine from interdicting.
In conclusion steam turbine interdiction early warning system provided by the present embodiment, by oil pressure monitor 5 to inserted valve 3
The oil pressure of control port monitors, and can be fed back to DCS control in the first time that Safety oil leakage situation occurs in 3 body of inserted valve
Device 6 processed, then its working condition is switched by control instruction of the DCS controller 6 to servo reversing valve 2, so that the pressure of main oil pump 1
Oil is ended, and is avoided pressure oil from directly flowing back to fuel tank from the oil return opening of oil motor 7, is prevented steam turbine from interdicting.
In a kind of preferred embodiment about servo reversing valve 2, which concretely has in O-shaped
The 3-position 4-way electro-hydraulic reversing valve of median function.When the oil pressure that oil pressure monitor 5 monitors is lower than safe oil pressure is preset, DCS control
Device 6 processed also can control servo reversing valve 2 and be in Median Function, and each hydraulic fluid port is turned off at this time.Meanwhile it realizing for convenience electro-hydraulic
Control is drawn in the control terminal (diagram X) of servo reversing valve 2 and is connected to all the way with the oil outlet of main oil pump 1, of course simultaneously with DCS
The connection of 6 signal of controller.In this way, can accurately adjust the oil inlet valve opening of servo reversing valve 2 by electro-hydraulic common adjusting
Size.In addition, servo reversing valve 2 can also be using two four-way electromagnetic reversing valves without Median Function.
In a kind of preferred embodiment about inserted valve 3, which specifically may include several sub- valves, each
Sub- valve with several and can be unified into one group again, meanwhile, multiple, general each guide's control can also be arranged in pilot control valve 4 simultaneously
Valve 4 processed controls the oil pressure of the control port of one group of sub- valve.Than state as shown, inserted valve 3 simultaneously include 4 sub- valves, two
Sub- valve in parallel connects into one group, while pilot control valve 4 is provided with 2 simultaneously, the actuator port of each pilot control valve 4 with
The control port connection of corresponding every sub- valve.In short, inserted valve 3 and pilot control valve 4 are valve group, quantity is specifically set
It can be increased and decreased according to actual needs, equivalent, discussion for convenience is acted on played in this blocking early warning system, it is interior below
Rong Jun is one with the quantity of inserted valve 3 and pilot control valve 4 and is illustrated.
In view of when the valve wall of inserted valve 3 generates leakage, system oil pressure may decline, in view of this, in the present embodiment
It is additionally arranged auxiliary oil pump 8, the operating status of the auxiliary oil pump 8 is controlled by DCS controller 6.Specifically, when auxiliary oil pump 8 is flat not
Operation only runs fuel feeding by main oil pump 1, when the oil pressure that oil pressure monitor 5 monitors is lower than safe oil pressure is preset, DCS control
Device 6 controls auxiliary oil pump 8 and runs, and operates jointly with main oil pump 1.
For the oil pressure condition for grasping main oil way of hydraulic system in real time, the present embodiment is changed in the oil outlet of main oil pump 1 with servo
Several pressure transmitters 9, the effect of the pressure transmitter 9 and aforementioned oil are provided on the pipeline between the oil inlet of valve 2
Press monitor 5 identical, can real-time detection main oil pump 1 oil outlet oil pressure, i.e. EH oil main pipe oil pressure.Meanwhile each pressure transmitter 9
It is connect with 6 signal of DCS controller, the data feedback that can be will test improves it and control precision to DCS controller 6.
In addition, for convenience of DCS controller 6 to servo reversing valve 2 send control instruction, with oil pressure leak initial adjustment into
Hydraulic fluid port valve opening is additionally arranged servo card 10 in the present embodiment.Specifically, the servo card 10 is mainly used for producing DCS controller 6
Raw automatically controlled signal is converted into the control terminal that voltage signal is sent to servo reversing valve 2, improves the valve opening of servo reversing valve 2
Control accuracy.
Moreover, it is contemplated that when the leakage of the valve wall of inserted valve 3, the control port release of inserted valve 3 leads to inserted valve
3 oil inlet and outlet conducting, will directly pass through oil motor 7 from the pressure oil that the first actuator port of servo reversing valve 2 flows out at this time
Left chamber oil inlet and oil return opening flow back into fuel tank, the piston of oil motor 7 will be persistently moved to the left at this time, be displaced quantitative response
Pressure oil leakage quantity and oil pressure reduction amount.To avoid pressure oil from quickly flowing back to fuel tank, displacement monitors are additionally arranged in the present embodiment
11, it is exclusively used in the piston motion stroke of monitoring oil motor 7, and the displacement monitors 11 are connect with 6 signal of DCS controller, it is real
When the data feedback that will test to DCS controller 6, and DCS controller 6 is then according to the data regulating control command of the feedback,
And then control the oil inlet valve opening variation of servo reversing valve 2.Simultaneously as it is anti-to be monitored data in displacement monitors 11
When feedback, current DCS controller 6 also sends the control instruction for having controlling opening of valve to servo reversing valve 2 by servo card 10, if
Pressure oil flows back to that fuel tank is too fast, then the control instruction that displacement monitors 11 generate after feeding back will be deposited with the present instruction of servo card 10
In relatively large deviation, at this point, DCS control then resets the control instruction of servo card 10, that is, by the oil inlet of servo reversing valve 2
Valve opening is adjusted to zero, completely closed state.At this point, servo reversing valve 2 is directly in second station, oil inlet and first
Actuator port cut-off, so prevents the pressure oil of main oil pump 1 and auxiliary oil pump 8 from continuing to flow into oil motor 7, avoids steam turbine interdiction.
In addition, main oil pump 1 can not be successfully through its actuator port and inserted valve 3 when the blocking of the oil circuit of pilot control valve 4
Control port connection, and then lead to the control port release of inserted valve 3, so that the oil inlet and outlet of inserted valve 3 is opened accidentally.Needle
In this regard, being additionally arranged alarm 12, display 13 and executing agency 14 in the present embodiment.
Specifically, alarm 12, display 13 and executing agency 14 connect with 6 signal of DCS controller.Wherein, work as oil
Pressure monitor 5 monitors oil pressure lower than the control port release of inserted valve 3 at this time when presetting safe oil pressure, is illustrated, inserted valve 3 is anticipated
Outer opening, and there is the oil circuit blocking in crack or pilot control valve 4 in the valve wall that reason may be inserted valve 3 or even the two is same
When exist.And while monitoring data are sent to DCS controller 6 by oil pressure monitor 5 alarm occurs for alarm 12, reminds
Staff carries out malfunction elimination, maintenance in time.Meanwhile to make staff receive alarm after, can quickly and accurately find
The encoded information of itself is sent to DCS controller 6 in company with monitoring data simultaneously by out of order component, oil pressure monitor 5 together,
When monitoring data exception, DCS controller 6 can by oil pressure monitor 5 send encoded information know specifically which
The monitoring data of oil pressure monitor 5, and encoded information shows staff by display 13.And each oil pressure prison
It surveys device 5 and corresponds to respective inserted valve 3 and pilot control valve 4, such staff can believe according to the coding of oil pressure monitor 5
Breath is quickly found out the inserted valve 3 and pilot control valve 4 of failure, and then improves troubleshooting, maintenance efficiency.
Meanwhile to improve the degree of automation, executing agency 14 can generate corresponding dynamic according to the control instruction of DCS controller 6
Make, for example, the concretely aggregate motions such as flushing pipe or manipulator mechanism, executing agency 14, know appearance when DCS controller 6 therefore
When the encoded information of the oil pressure monitor 5 of barrier, which carries out the corresponding pilot reversing valve of oil pressure monitor 5
Oil circuit flushing operation, or the operation such as spray containment glue is carried out to the valve body of corresponding pilot valve simultaneously, be so automatically performed troubleshooting,
Maintenance operation.
The present embodiment also provides a kind of generating set, includes mainly steam turbine interdiction early warning system, specifically, the steam turbine
Blocking early warning system is identical as above-mentioned related content, and details are not described herein again.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (10)
1. a kind of steam turbine interdiction early warning system of generating set, which is characterized in that including main oil pump (1), servo reversing valve
(2), inserted valve (3), pilot control valve (4), oil pressure monitor (5), DCS controller (6), oil motor (7)；
The oil outlet of the main oil pump (1) is connected to the oil inlet of the servo reversing valve (2), the servo reversing valve (2)
First actuator port is connected to the right chamber oil inlet of the oil inlet of the inserted valve (3) and the oil motor (7) simultaneously, described to insert
The oil outlet of dress valve (3) is connected to the left chamber oil inlet of the oil motor (7), and the oil return opening of the oil motor (7) is set to it
Left chamber, and the oil return opening of the oil motor (7) is connected to fuel tank；
When the servo reversing valve (2) is in the first station, oil inlet is connected with its first actuator port, the servo commutation
When valve (2) is in second station, oil inlet and its first actuator port end；
The oil outlet of the main oil pump (1) is connected to the oil inlet of the pilot control valve (4) simultaneously, the pilot control valve
(4) actuator port is connected to the control port of the inserted valve (3), and the oil pressure monitor (5) is for monitoring the inserting
The control port oil pressure of valve (3) and monitoring data are sent to the DCS controller (6)；
When the pilot control valve (4) is in the first station, actuator port is connected with its oil inlet, the pilot control valve
(4) when being in second station, actuator port is connected with fuel tank；
The DCS controller (6) is used to control the working condition of the pilot control valve (4), and in the oil pressure monitor (5)
For the oil pressure monitored lower than when presetting safe oil pressure, controlling the servo reversing valve (2) makes it work in second station.
2. steam turbine interdiction early warning system according to claim 1, which is characterized in that further include and the main oil pump (1)
Oil outlet connection auxiliary oil pump (8), and the auxiliary oil pump (8) is connect with DCS controller (6) signal, in the oil pressure
For the oil pressure that monitor (5) monitors lower than when presetting safe oil pressure, the DCS controller (6) controls auxiliary oil pump (8) fortune
Row.
3. steam turbine interdiction early warning system according to claim 2, which is characterized in that further include and the DCS controller
(6) signal connection, oil inlet oil pressure for monitoring the servo reversing valve (2) pressure transmitter (9).
4. steam turbine interdiction early warning system according to claim 3, which is characterized in that the servo reversing valve (2) is specific
For O-shaped Median Function 3-position 4-way electro-hydraulic reversing valve.
5. steam turbine interdiction early warning system according to claim 1-4, which is characterized in that further include with it is described
DCS controller (6) is connected with the control end signal of the servo reversing valve (2), for the control according to the DCS controller (6)
System instruction controls the servo card (10) of the oil inlet valve aperture of the servo reversing valve (2).
6. steam turbine interdiction early warning system according to claim 5, which is characterized in that further include and the DCS controller
(6) signal connection, piston for monitoring the oil motor (7) stretch the displacement monitors (11) of stroke, and in the displacement
The control instruction that the monitoring data of monitor (11) are formed after feeding back to the DCS controller (6) and the servo card (10)
When present instruction deviation is greater than default blocking safety value, the DCS controller (6) resets the instruction of the servo card (10),
So that the servo reversing valve (2) works in second station.
7. steam turbine interdiction early warning system according to claim 6, which is characterized in that further include and the DCS controller
(6) signal connection, the report for being sounded an alarm when the oil pressure that the oil pressure monitor (5) monitors is lower than and presets safe oil pressure
Alert device (12).
8. steam turbine interdiction early warning system according to claim 7, which is characterized in that further include and the DCS controller
(6) signal connects, for monitoring that oil pressure shows the inserted valve lower than when presetting safe oil pressure in the oil pressure monitor (5)
(3) and the display (13) of the encoded information of the corresponding pilot control valve (4).
9. steam turbine interdiction early warning system according to claim 8, which is characterized in that further include and the DCS controller
(6) signal connection, for the oil pressure monitor (5) monitor oil pressure lower than preset safe oil pressure when to the inserted valve
(3) valve body crack is sealed and/or carries out to the hydraulic fluid port of the pilot control valve (4) executing agency of impurity cleaning
(14)。
10. a kind of generating set, which is characterized in that including such as claim 1-9 described in any item steam turbine interdiction early warning system
System.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821961827.9U CN209067589U (en) | 2018-11-26 | 2018-11-26 | A kind of generating set and its steam turbine interdiction early warning system |
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| CN201821961827.9U CN209067589U (en) | 2018-11-26 | 2018-11-26 | A kind of generating set and its steam turbine interdiction early warning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109268347A (en) * | 2018-11-26 | 2019-01-25 | 湖北华电江陵发电有限公司 | A kind of generating set and its steam turbine interdiction early warning system |
-
2018
- 2018-11-26 CN CN201821961827.9U patent/CN209067589U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109268347A (en) * | 2018-11-26 | 2019-01-25 | 湖北华电江陵发电有限公司 | A kind of generating set and its steam turbine interdiction early warning system |
| CN109268347B (en) * | 2018-11-26 | 2024-02-13 | 湖北华电江陵发电有限公司 | Generator set and steam turbine interruption early warning system thereof |
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