CN207437899U - A kind of high row's ventilation valve control system of million power generator turbines - Google Patents
A kind of high row's ventilation valve control system of million power generator turbines Download PDFInfo
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- CN207437899U CN207437899U CN201721164126.8U CN201721164126U CN207437899U CN 207437899 U CN207437899 U CN 207437899U CN 201721164126 U CN201721164126 U CN 201721164126U CN 207437899 U CN207437899 U CN 207437899U
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Abstract
The utility model discloses a kind of high row's ventilation valve control systems of million power generator turbines, it includes pneumatic line and double-acting cylinder, the telescopic rod of double-acting cylinder is connected with the spool of high row's ventilation valve, pass through the closing and unlatching of the high row's ventilation valve of the extended and retracted completion of telescopic rod, pneumatic line includes admission line, first performs pipeline, second performs pipeline and control pipeline, first performs pipeline, second execution pipeline and the inlet end of control pipeline are connected respectively with the outlet side of admission line, pipeline and second, which is performed, by first performs the flexible of pipe control double-acting cylinder, the break-make of the gas of pipeline and the second execution pipeline is performed by control pipeline control first.The control unit of the utility model can keep at a distance with steam-turbine unit, reduce failure, run more reliable safety.
Description
Technical field
The utility model is related to a kind of high row's ventilation valve control system, more particularly, to a kind of high row of million power generator turbines
Ventilation valve control system.
Background technology
Height row's ventilation valve (abbreviation VV valves) is mainly equipped in the Steam Turbine of Dongfan Steam Turbine Factory production, valve installation
In high pressure cylinder steam discharge pipeline section, while it is connected with condenser and maintains unit vacuum.There are two the effects of VV valves is main：First, in high pressure
VV valves are opened after cylinder pre-warm and lay down high-pressure governing valve to the steam pressure between middle door；Second is that when unit chaser or removal of load
It is quick to open VV valves, the steam of high pressure cylinder is discharged, prevents from damaging equipment due to high pressure cylinder overtemperature causes high pressure rotor blade to overheat.
Unit normal operation particularly oepration at full load when, main steam pressure is up to 25.4MPa, working environment residing for VV valves
Temperature is high, vibration is big, is easy to cause the fracture of air-channel system gas circuit pipe, acting gas pipe joint loosens, feedback device limit switch loosens
And the failures such as feedback device wiring loosening scaling loss；VV valves solenoid valve is in long-term electriferous state simultaneously, and electromagnetic valve coil is burnt out
Probability also greatly increase.Above-mentioned failure may all cause VV valves in unit normal operating phase because failure is opened, and VV valves are abnormal
Unlatching will cause high steam to be exhausted directly to condenser, and high temperature and high pressure steam directly washes away to the titanium tube of condenser and will cause titanium tube
Damage, seriously affect the safe and stable operation of unit, therefore correct, the steady operation of VV valves are particularly important.
To improve the safety and reliability of VV valve control systems, in technological design, in-site installation and interlock protection
Etc. need to consider the various accidental conditions of unit and accident conditions comprehensively, should ensure that it can be worked normally,
Prevent malfunction.It so needing to carry out special item for the control system of VV valves, and installs and is debugged at the scene, to ensure
Unit can safely and reliably be run after putting into operation.
Utility model content
Technical problem to be solved in the utility model is just to provide a kind of high row's ventilation valve control of million power generator turbines
System, control unit can keep at a distance with steam-turbine unit, reduce failure, run more reliable safety.
Above-mentioned technical problem is solved, the technical solution adopted in the utility model is as follows：
A kind of high row's ventilation valve control system of million power generator turbines, it is characterised in that：Including pneumatic line and double acting
Cylinder 2, the telescopic rod 1 of double-acting cylinder is connected with the spool of high row's ventilation valve, high by the extended and retracted completion of telescopic rod
The closing and unlatching of ventilation valve are arranged, pneumatic line includes admission line, the first execution pipeline, the second execution pipeline and control pipe
Road, the inlet end of the first execution pipeline, the second execution pipeline and control pipeline are connected respectively with the outlet side of admission line；
The gas chamber for making the stretching of Telescopic-cylinder bar for air inlet of the other end connection double-acting cylinder of first execution pipeline,
It is equipped with to switch its gas chamber connected is connected with exterior space or connected with admission line first on first execution pipeline
Gas control switching valve 12；
The gas chamber for making the retraction of Telescopic-cylinder bar for air inlet of the other end connection double-acting cylinder of second execution pipeline,
Second perform pipeline on along airintake direction successively be equipped with the first non-return valve 8,14 and second gas control switching valve 13 of air accumulator, second
The gas chamber that gas control switching valve 13 is used to switch its connection is connected with exterior space or connected with air accumulator；
The outlet side of control pipeline connects the gas control end of the first gas control switching valve 12 and the gas control of the second gas control switching valve 13
End, control pipeline are equipped with to control the solenoid valve of break-make, be opened when solenoid valve is charged.
The first solenoid valve 9 and air lock 11 are equipped with successively along airintake direction in the control pipeline, in the first solenoid valve 9
Upper parallel connection is connected to second solenoid valve 10.
The first filtering pressure reducer 3 and the second non-return valve 6 are equipped with successively along airintake direction on the admission line.
The pneumatic line further includes Article 2 admission line except above-mentioned admission line, suitable on Article 2 admission line
It airintake direction and is equipped with the second filtering pressure reducer 4 and the 3rd non-return valve 7 successively, the inlet end of two admission lines distinguishes air inlet,
Outlet side is come together in a common conduit, common conduit with first perform pipeline, second perform pipeline and control pipeline into
Gas end connects.
The common conduit is equipped with to measure the pressure transmitter 5 of monitoring air pressure.
High row's ventilation valve control system further includes two control circuits, respectively and couples in two control circuits
There is the coil of first, second DC relay 105,106, also parallel connection is connected to the first, the 3rd intermediate relay 107,108 respectively
Coil, the also in parallel coil for being connected to the second, the 4th intermediate relay 109,110 respectively, finally also respectively parallel connection be connected to first,
Second output winding 111,112 is respectively equipped on the parallel circuit where the coil of first, second DC relay 105,106
It is logical to be respectively equipped with high row on the parallel circuit where the coil of the first, the 3rd intermediate relay 107,108 for normally closed alarm switch
Air-valve opens switch OD1, OD2, is respectively equipped on the parallel circuit where the coil of the second, the 4th intermediate relay 109,110
Height row's ventilation valve closure switch CD1, CD2, the parallel circuit where first, second output winding 111,112 is equipped with first, the
The normal open switch of three intermediate relays 107,108 and the normally closed switch of the second, the 4th intermediate relay 109,110, first,
Two output windings 111,112 control solenoid valve controls the power on/off of the first solenoid valve and the coil of second solenoid valve respectively.
The high row's ventilation valve control system of million power generator turbine further includes high row's ventilation valve trouble-shooter, height row
Ventilation valve trouble-shooter includes the first limit switch, the second limit switch, the 3rd limit switch and computer, and in height, row is logical
When air-valve is opened, the first limit switch is triggered, when height row's ventilation valve is closed, the second limit switch is triggered and the 3rd /V is opened
It closes, the first limit switch, the second limit switch, the 3rd limit switch are connected respectively with computer.
The computer has device by steam turbine and obtains the high pitch shutdown signal of steam turbine and high pitch height value,
Computer also obtains the first limit switch trigger signal, the second limit switch trigger signal and the 3rd limit switch trigger signal.
Compared with prior art, the utility model has the advantages that：
1st, the utility model connects the telescopic rod of the spool of high row's ventilation valve and double-acting cylinder, passes through double-acting cylinder
The high row's ventilation valve of extended and retracted completion closing and unlatching, double-acting cylinder realizes control by pneumatic line control action
Component is kept at a distance with steam-turbine unit, and the telescopic rod of double-acting cylinder is only needed to be contacted with steam-turbine unit, avoids control unit
Be chronically at the working environment that temperature is high, vibration is big, and the solenoid valve of pneumatic line for it is charged when open, avoid in long-term
Electriferous state, reduction burn out probability, reduce failure, run more reliable safety.
2nd, the utility model second performs pipeline and stores control gas by air accumulator, in failure admission line without control
When gas entrance processed or other operating modes, by the control gas in air accumulator double-acting cylinder can also be controlled to act, so as to
The high row's ventilation valve events of control, run more reliable safety.
Description of the drawings
Fig. 1 is the pneumatic line of the utility model and the assembling schematic diagram of double-acting cylinder；
Fig. 2 is the schematic diagram of two control circuits of the utility model；
Fig. 3 is the Logical Configuration signal of the computer disposal signal of high row's ventilation valve trouble-shooter of the utility model
Figure.
Reference numeral meaning in figure：
1- telescopic rods；2- double-acting cylinders；The first filtering pressure reducers of 3-；The second filtering pressure reducers of 4-；5- pressure transmitters；
The second non-return valves of 6-；The 3rd non-return valves of 7-；The first non-return valves of 8-；The first solenoid valves of 9-；10- second solenoid valves；11- air locks；
12- the first gas control switching valves；13- the second gas control switching valves；14- air accumulators；The first limit switches of 15-；The second /Vs of 16- are opened
It closes；The 3rd limit switches of 17-；The first power supplys of 101-；102- second sources；The first power switches of 103-；104- second sources are opened
It closes；The first DC relays of 105-；The second DC relays of 106-；The first intermediate relays of 107-；The 3rd intermediate relays of 108-
Device；The second intermediate relays of 109-；The 4th intermediate relays of 110-；The first output windings of 111-；The second output windings of 112-；
601- high lower bound module；602- two from three modules；603- time delay modules；604- high arranges ventilation valve failure output module.
Specific embodiment
The utility model is further described with reference to embodiment.
The high row's ventilation valve control system embodiment of million power generator turbines of the utility model, including pneumatic line, double cropping
With 2, two control circuits of cylinder and high row's ventilation valve trouble-shooter.
Pneumatic line as shown in Figure 1 and the assembling schematic diagram of double-acting cylinder.The telescopic rod 1 of double-acting cylinder 2 and height
The spool connection of ventilation valve is arranged, passes through the closing and unlatching of the high row's ventilation valve of the extended and retracted completion of telescopic rod.Pneumatic line
Pipeline, the second execution pipeline and control pipeline are performed including two admission lines independent and that configuration is the same, first.Air inlet
On pipeline first, second filtering pressure reducer 3,4 and second, third non-return valve 6,7 are equipped with successively along airintake direction, second, the
Three non-return valves 6,7 prevent gas backflow.The inlet end difference air inlet of two admission lines, outlet side comes together in a common conduit
On, common conduit is equipped with to measure the pressure transmitter 5 of monitoring air pressure, and pressure transmitter 5 is real for maintenance and operations staff
When monitor bleed pressure.It, will also be defeated after first, second filtering pressure reducer 3,4 filters out moisture, oil, foreign matter in air etc.
Go out the work source of the gas of 0.4~0.7MPa pressure.By the way that two admission lines is set to reduce because losing source of the gas to bring risk.
The inlet end of first execution pipeline is connected with common conduit, the other end connects making for air inlet for double-acting cylinder 2
The gas chamber that Telescopic-cylinder bar stretches out is equipped with the first gas control switching valve 12, the first gas control switching valve 12 on the first execution pipeline
Pass through realization switching of ventilating or die at its gas control end.As shown in fig. 1, it is equipped with E-U and S-U in the first gas control switching valve 12
Two changeable accesses, U ends are connected with gas chamber, and S ends are connected with common conduit, and E ends are connected with extraneous air, the first gas
The gas chamber that control switching valve is used to switch its connection is connected with exterior space or connected with admission line.
Second execution pipeline air-inlet end is connected with common conduit, and other end connection double-acting cylinder 2 makes gas for air inlet
The gas chamber of cylinder telescopic rod retraction performs second and is equipped with the first non-return valve 8,14 and of air accumulator successively along airintake direction on pipeline
Second gas control switching valve 13, the gas of common conduit are stored in after the first non-return valve 8 in air accumulator 14 first, the first non-return valve
Prevent the gas flow guiding of air accumulator, the second gas control switching valve 13 passes through realization switching of ventilating or die at its gas control end.In Fig. 1
It is shown, two changeable accesses of E-U and S-U also are provided in the second gas control switching valve 13, U ends are connected with gas chamber, E ends and storage
Gas tank connects, and S ends are connected with extraneous air, and the gas chamber that the second gas control switching valve is used to switch its connection is connected with exterior space
Or it is connected with air accumulator.
The inlet end of control pipeline is connected with common conduit, and outlet side connects the gas control end and the of the first gas control switching valve 12
The gas control end of two gas control switching valves 13 is equipped with the first solenoid valve 9 and air lock 11 in control pipeline successively along airintake direction,
Parallel connection is connected to second solenoid valve 10, the first solenoid valve 9 and second solenoid valve 10 and opens when charged on first solenoid valve 9.Simultaneously
The effect for setting the first solenoid valve 9 and second solenoid valve 10 is to prevent solenoid valve failure, the first solenoid valve 9 and second solenoid valve 10
It is powered respectively by different circuits.
When the first solenoid valve 9 is charged or second solenoid valve 10 is charged or the first solenoid valve 9 and second solenoid valve 10 band simultaneously
During the situation of electricity, common conduit gas flow air lock 11, the S-U pathway patencies of air lock 11, gas send to the first gas control and cuts
The gas control end of valve 12 and the gas control end of the second gas control switching valve 13 are changed, at this point, the first gas control switching valve 12 is switched to S-U accesses,
The gas chamber connection that common conduit is connected with the first gas control switching valve, the gas chamber that gas is connected into the first gas control switching valve, second
Gas control switching valve 13, which switches, is also switched to S-U accesses, and the gas chamber of the second gas control switching valve connection is connected with exterior space, the gas chamber
Gas is discharged, and the telescopic rod 1 of double-acting cylinder extends downwardly, and the spool of height row's ventilation valve moves down, and height row's ventilation valve is closed.
When the first solenoid valve 9 and second solenoid valve 10 dead electricity or when entering control pipeline without gas simultaneously, the first gas control is cut
Valve 12 is changed as E-U accesses, the gas chamber connection of the first gas control switching valve 12 connection is connected with exterior space, gas chamber gas discharge,
Second gas control switching valve 13 is also E-U accesses, and the gas chamber of the second gas control switching valve 13 connection is connected with air accumulator 14, air accumulator 14
Gas into the gas chamber, the telescopic rod 1 of double-acting cylinder is retracted upwards, and the spool of height row's ventilation valve moves up, height row's ventilation valve
It opens.
Two control circuits are to lose power supply and risk that instruction path failure is brought to reduce.Control as shown in Figure 2
Circuit processed, the configuration of two control circuits is identical, two control circuits respectively by first, second power supply 101,102 power, with
One end of first, second power supply 101,102 connection is respectively equipped with first, second power switch 103,104, in two control circuits
The in parallel coil for being connected to first, second electric DC relay 105,106 respectively, also respectively parallel connection be connected among the first, the 3rd after
The coil of electric appliance 107,108, the also in parallel coil for being connected to the second, the 4th intermediate relay 109,110 respectively, simultaneously also respectively finally
Connection has first, second output winding 111,112, the parallel circuit where the coil of first, second DC relay 105,106
On be respectively equipped with normally closed alarm switch, on the parallel circuit where the coil of the first, the 3rd intermediate relay 107,108 respectively
Switch OD1, OD2, the parallel circuit where the coil of the second, the 4th intermediate relay 109,110 are opened equipped with height row's ventilation valve
High row's ventilation valve closure switch CD1, CD2 are equipped with, the parallel circuit where first, second output winding 111,112 is equipped with
Firstth, the normally closed switch of the normal open switch of the 3rd intermediate relay 107,108 and the second, the 4th intermediate relay 109,110, two
The output winding of control circuit controls the first solenoid valve and second solenoid valve respectively, and worker passes through the first electricity of control circuit control
Magnet valve and second solenoid valve.
During control circuit dead electricity, first, second DC relay 105,106 generates signal output to deh control system, hair
Go out alarm.First, second output winding 111,112 controls the power on/off of electromagnetic valve coil, is opened when DCS provides high row's ventilation valve
During instruction, high row's ventilation valve is opened switch OD1, OD2 and is closed, and first, second output winding 111,112 obtains electric, electromagnetic valve coil
Dead electricity, height row's ventilation valve are opened；When DCS provides high row's ventilation valve close command, height row's ventilation valve closure switch CD1, CD2 are closed
It closes, first, second output winding 111,112 dead electricity, electromagnetic valve coil obtains electric, height row's ventilation valve closing.
Height row's ventilation valve trouble-shooter includes the first limit switch 15, the second limit switch 16, the 3rd limit switch
17 and computer, when height row's ventilation valve is opened, the first limit switch is triggered, when height row's ventilation valve is closed, the second limit of triggering
Bit switch and the 3rd limit switch, while setting the second limit switch and the 3rd limit switch is arranged in order to which more accurate judgement is high
The actual switch position of ventilation valve and the breakdown judge for improving high row's ventilation valve, the first limit switch, the second limit switch, the 3rd
Limit switch is connected respectively with computer.Computer by steam turbine have device obtain steam turbine high pitch shutdown signal and
High pitch height value, computer also obtain the first limit switch trigger signal, the second limit switch trigger signal and the 3rd /V
Switch triggering signal.
As shown in figure 3, computer triggers the high pitch shutdown signal of acquisition, high pitch height value, the first limit switch
The method that signal, the second limit switch trigger signal and the 3rd limit switch trigger signal carry out Logical Configuration processing is：
It is divided into two logical process lines：
Logical signal after first logical process line is negated to high pitch shutdown signal is being set with high pitch height value
Decision logic information in value take or, to take or after logical signal carry out in 20s the judgement of logical one whether being kept to draw
Logical signal；Whether judgement of the high pitch height value in setting value passes through the Gao lower bounds module 601 in Fig. 3, kept in 20s
The judgement of logical one passes through the time delay module 603 in Fig. 3.
Logical signal, the second limit switch after Article 2 logical process line is negated to the first limit switch trigger signal touch
Signal and the 3rd limit switch trigger signal be made whether that two of which signal is the judgement of logical one, then to judgement after
Logical signal it is negated；The judgement whether two of which signal is logical one passes through the two from three module 602 in Fig. 3.
The finally last logical signal of the last logical signal to first logical process line and Article 2 logical process line
It takes and if being high row's ventilation valve failure when taking be afterwards logical one, if failure, it is defeated that ventilation valve failure is arranged by high in Fig. 3
Go out module 604 and export fault-signal.
The utility model significantly reduces high row's ventilation valve failure in unit normal operation and opens possibility with tripping,
The correct of high row's ventilation valve can be effectively ensured and act and avoid caused by high row's ventilation valve failure is opened that operating unit is improper to stop
Fortune；In addition, can also find simultaneously processing equipment defect as early as possible in time by newly-increased in-service monitoring measuring point, effectively avoid because of defect model
Accident caused by enclosing expansion.
The improper stoppage in transit of operating unit may cause hundreds of thousands, and to millions of economic losses, reliable high row is led to
Air-valve control system can avoid the improper stoppage in transit of unit that high row's ventilation valve failure is brought as far as possible.And good working environment,
Reduce the frequency that high row's ventilation valve control system relevant device is safeguarded and replaced, reduce manpower, cost of equipment maintenance.
Claims (8)
1. a kind of high row's ventilation valve control system of million power generator turbines, it is characterised in that：Including pneumatic line and double acting gas
Cylinder (2), the telescopic rod (1) of the double-acting cylinder are connected with the spool of high row's ventilation valve, pass through stretching for the telescopic rod
Go out and be retracted the closing and unlatching of completing high row's ventilation valve, the pneumatic line include admission line, first perform pipeline,
Second performs pipeline and control pipeline, described first perform pipeline, second perform the inlet end of pipeline and control pipeline respectively with
The outlet side connection of the admission line；
The other end of the first execution pipeline connects the gas for stretching out Telescopic-cylinder bar for air inlet of the double-acting cylinder
Room, the gas chamber for being equipped with to switch its connection on the described first execution pipeline are connected with exterior space or connected with admission line
The first logical gas control switching valve (12)；
The other end of the second execution pipeline connects the gas for being retracted Telescopic-cylinder bar for air inlet of the double-acting cylinder
Room performs described second and is equipped with the first non-return valve (8), air accumulator (14) and the second gas control successively along airintake direction on pipeline
Switching valve (13), gas chamber that the second gas control switching valve (13) is used to switch its connection connect or and air accumulator with exterior space
Connection；
The outlet side of the control pipeline connects the gas control end of the first gas control switching valve (12) and second gas control switching
The gas control end of valve (13), the control pipeline are equipped with to control the solenoid valve of break-make, and the solenoid valve is opened when charged.
2. the high row's ventilation valve control system of million power generator turbine according to claim 1, it is characterised in that：The control
The first solenoid valve (9) and air lock (11) are equipped with successively along airintake direction on pipeline, it is in parallel on first solenoid valve (9)
It is connected to second solenoid valve (10).
3. the high row's ventilation valve control system of million power generator turbine according to claim 2, it is characterised in that：The air inlet
The first filtering pressure reducer (3) and the second non-return valve (6) are equipped with successively along airintake direction on pipeline.
4. the high row's ventilation valve control system of million power generator turbine according to claim 3, it is characterised in that：It is described pneumatic
Pipeline further includes Article 2 admission line except above-mentioned admission line, on the Article 2 admission line along airintake direction according to
It is secondary to be equipped with the second filtering pressure reducer (4) and the 3rd non-return valve (7), the inlet end difference air inlet of two admission lines, outlet
End is come together in a common conduit, and the common conduit performs pipeline, the second execution pipeline and control pipeline with described first
Inlet end connection.
5. the high row's ventilation valve control system of million power generator turbine according to claim 4, it is characterised in that：It is described public
Pipeline is equipped with to measure the pressure transmitter (5) of monitoring air pressure.
6. the high row's ventilation valve control system of million power generator turbines according to claim 2 to 5 any one, feature exist
In：High row's ventilation valve control system further includes two control circuits, respectively and couples in two control circuits
Have the coil of first, second DC relay (105,106), also respectively parallel connection be connected to the first, the 3rd intermediate relay (107,
108) coil, also parallel connection is connected to the coil of the second, the 4th intermediate relay (109,110) respectively, finally also respectively and couples
There is first, second output winding (111,112)；Parallel connection where the coil of first, second DC relay (105,106)
It is respectively equipped with normally closed alarm switch on circuit, described first, the parallel connection where the coil of the 3rd intermediate relay (107,108)
It high row's ventilation valve is respectively equipped on circuit opens switch (OD1, OD2), described second, the 4th intermediate relay (109,110)
High row's ventilation valve closure switch (CD1, CD2), first, second output winding are respectively equipped on parallel circuit where coil
Be respectively equipped on parallel circuit where (111,112) described first, the 3rd intermediate relay (107,108) normal open switch and
Described second, the normally closed switch of the 4th intermediate relay (109,110), first, second output winding (the 111,112) control
Solenoid valve controls the power on/off of first solenoid valve and the coil of second solenoid valve respectively.
7. the high row's ventilation valve control system of million power generator turbine according to claim 6, it is characterised in that：Described million
The high row's ventilation valve control system of power generator turbine further includes high row's ventilation valve trouble-shooter, and high row's ventilation valve failure is examined
Disconnected device includes the first limit switch, the second limit switch, the 3rd limit switch and computer, is opened in high row's ventilation valve
When, first limit switch is triggered, when high row's ventilation valve is closed, triggers second limit switch and the 3rd /V
Switch, first limit switch, the second limit switch, the 3rd limit switch are connected respectively with computer.
8. the high row's ventilation valve control system of million power generator turbine according to claim 7, it is characterised in that：The calculating
Machine has device by the steam turbine and obtains the high pitch shutdown signal of the steam turbine and high pitch height value, the calculating
Machine also obtains the first limit switch trigger signal, the second limit switch trigger signal and the 3rd limit switch trigger signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721164126.8U CN207437899U (en) | 2017-09-12 | 2017-09-12 | A kind of high row's ventilation valve control system of million power generator turbines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721164126.8U CN207437899U (en) | 2017-09-12 | 2017-09-12 | A kind of high row's ventilation valve control system of million power generator turbines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207437899U true CN207437899U (en) | 2018-06-01 |
Family
ID=62301760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721164126.8U Withdrawn - After Issue CN207437899U (en) | 2017-09-12 | 2017-09-12 | A kind of high row's ventilation valve control system of million power generator turbines |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107461540A (en) * | 2017-09-12 | 2017-12-12 | 广东粤电靖海发电有限公司 | A kind of high row's ventilation valve control system of million power generator turbines |
-
2017
- 2017-09-12 CN CN201721164126.8U patent/CN207437899U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107461540A (en) * | 2017-09-12 | 2017-12-12 | 广东粤电靖海发电有限公司 | A kind of high row's ventilation valve control system of million power generator turbines |
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Granted publication date: 20180601 Effective date of abandoning: 20230414 |