CN204163775U - Turbine emergency trip system - Google Patents
Turbine emergency trip system Download PDFInfo
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- CN204163775U CN204163775U CN201420643555.3U CN201420643555U CN204163775U CN 204163775 U CN204163775 U CN 204163775U CN 201420643555 U CN201420643555 U CN 201420643555U CN 204163775 U CN204163775 U CN 204163775U
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Abstract
Turbine emergency trip system, it relates to a kind of control system of steam turbine.The utility model is in order to solve the redundancy in prior art on simple different forms, and logical construction arranges unreasonable, there is tripping rate and the high problem of malfunction rate.The utility model comprises the first PLC, the second PLC, EH oil controll block, vacuum control block, lubricant oil controll block, axial displacement monitor unit, over speed protection, tripping controller, external or door, alarm and AST solenoid valve group; EH oil controll block is provided with an EH pressure switch, the 2nd EH pressure switch, the 3rd EH pressure switch and the 4th EH pressure switch, and lubricant oil controll block is provided with the first lubricating oil pressure switch, the second lubricating oil pressure switch, the 3rd lubricating oil pressure switch and the 4th lubricating oil pressure switch.The utility model reduces tripping rate and the malfunction rate of system, makes system have higher sensitivity, and manipulation is convenient.
Description
Technical field
The utility model relates to steam turbine control system, is specifically related to turbine emergency trip system, belongs to steam turbine protection control field.
Background technique
Because the capacity of steam turbine set continues to increase; system is more complicated; in order to improve Economy and the Security of unit; need to monitor (comprise EH low fuel pressure, condenser vacuum is too low, lubricant oil forces down, axial displacement is large, Steam Turbine Over-speed Accident etc.) to some Operational Limits of unit; carry out pointing out and alarm to unit operator on duty when some parameter exceedes specified value; when can not get processing or have emergency to occur in time; ETS(Emergency Trip System; Emergency Trip System of Steam Turbines) steam turbine emergency shutdown can be made, ensure unit safety.Existing steam turbine trip system generally adopts the hardware redundancy scheme of two PLC system, and logical construction arranges unreasonable, there is tripping rate and the high defect of malfunction rate, makes steam turbine ets Systematical control dumb.
Summary of the invention
The purpose of this utility model is the redundancy in order to solve in prior art on simple different forms, and logical construction arranges unreasonable, there is tripping rate and the high problem of malfunction rate.
The technical solution of the utility model is: a kind of turbine emergency trip system, comprise the first PLC, second PLC, EH oil controll block, vacuum control block, lubricant oil controll block, axial displacement monitor unit, over speed protection, tripping controller, external or door, alarm and AST solenoid valve group, described EH oil controll block is provided with an EH pressure switch, 2nd EH pressure switch, 3rd EH pressure switch and the 4th EH pressure switch, vacuum control block is provided with the first vacuum pressure switch, second vacuum pressure switch, 3rd vacuum pressure switch and the 4th vacuum pressure switch, lubricant oil controll block is provided with the first lubricating oil pressure switch, second lubricating oil pressure switch, 3rd lubricating oil pressure switch and the 4th lubricating oil pressure switch, described axial displacement monitor unit comprises the first displacement monitoring module and the second displacement monitoring module, described over speed protection comprises first and to test the speed block, second tests the speed block, 3rd block and the 4th that tests the speed tests the speed block,
Be provided with first or door, second or door, the 3rd or door, the 4th or door and first and door in described first PLC, in the second PLC, be provided with the 5th or door, the 6th or door, the 7th or door, the 8th or door and second and door;
One EH pressure switch of described EH oil controll block and the 3rd EH pressure switch are connected the input end of first or door respectively by wire, first vacuum pressure switch of vacuum control block and the 3rd vacuum pressure switch are connected the input end of second or door respectively by wire, first lubricating oil pressure switch of lubricant oil controll block and the 3rd lubricating oil pressure switch are connected the input end of the 3rd or door respectively by wire, first block and the 3rd block that tests the speed that tests the speed is connected the input end of the 4th or door by wire, first or gate output terminal, second or gate output terminal, 3rd or gate output terminal, 4th or gate output terminal and the first displacement monitoring module output terminal respectively by wire and first and the input end of door connect, first is connected by wire and input end that is external or door with the output terminal of door, 2nd EH pressure switch of described EH oil controll block and the 4th EH pressure switch are connected the input end of the 5th or door respectively by wire, second vacuum pressure switch of vacuum control block and the 4th vacuum pressure switch are connected the input end of the 6th or door respectively by wire, second lubricating oil pressure switch of lubricant oil controll block and the 4th lubricating oil pressure switch are connected the input end of the 7th or door respectively by wire, second block and the 4th block that tests the speed that tests the speed is connected the input end of the 8th or door by wire, 5th or gate output terminal, 6th or gate output terminal, 7th or gate output terminal, 8th or gate output terminal and the second displacement monitoring module output terminal respectively by wire and second and the input end of door connect, second is connected by wire and input end that is external or door with the output terminal of door, input end that is external or door connects the input end of tripping controller by wire, the output terminal of tripping controller and AST solenoid valve and alarm are connected by wire.
Described first PLC 1 is connected independent PLC power supply respectively with the second PLC 2, and two PLC all use independent current source, make system more stable.
Described turbine emergency trip system comprises protection throwing and moves back device, and described protection throwing is moved back device inside and is provided with logic control panel, and protection throwing is moved back device outside and is provided with EH oil pressure switch, vacuum switch, oil cock, axial displacement switch, over speed switch and taboo throw tutorial light, described EH oil controll block, vacuum control block, lubricant oil controll block, axial displacement monitor unit and over speed protection connect respectively by the input end of wire andlogic control plate, the output terminal of logic control panel by wire respectively with EH oil pressure switch, vacuum switch, oil cock, axial displacement switch, over speed switch and taboo are thrown tutorial light correspondence and are connected, make system have protection and throw the function of moving back, protection throwing is moved back function and is emulated on-site signal, can when overhauling to system line or program test, can carry out throwing to all protections moves back operation simultaneously, carries out logical operation, by each switch of outside by the logic control panel of inside, control throwing to move back, make system have higher Security and promptness.
The utility model compared with prior art has following effect: whole system is from detecting that control all adopts channel structure, two cover PLC control system process a part of data separately, the alarm signal corresponding with parameter by both sides PLC to DCS(Distributed Control System, distributed control system) send, and two cover PLC control system have tripping operation processing capacity, when any one parameter meets trip condition, corresponding solenoid valve can be made to trip, if when a set of like this PLC system goes wrong, can not have an impact to system, the tripping rate of reduction system and malfunction rate, adopt the logical construction of " or-and ", system is made to have higher sensitivity, manipulation is convenient.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
In figure 1, first PLC, 1-1, first or door, 1-2, second or door, 1-3, 3rd or door, 1-4, 4th or door, 1-5, first and door, 2, second PLC, 2-1, 5th or door, 2-2, 6th or door, 2-3, 7th or door, 2-4, 8th or door, 2-5, second and door, 3, EH oil controll block, 3-1, one EH pressure switch, 3-2, 2nd EH pressure switch, 3-3, 3rd EH pressure switch, 3-4, 4th EH pressure switch, 4, vacuum control block, 4-1, first vacuum pressure switch, 4-2, second vacuum pressure switch, 4-3, 3rd vacuum pressure switch, 4-4, 4th vacuum pressure switch, 5, lubricant oil controll block, 5-1, first lubricating oil pressure switch, 5-2, second lubricating oil pressure switch, 5-3, 3rd lubricating oil pressure switch, 5-4, 4th lubricating oil pressure switch, 6, axial displacement monitor unit, 6-1, first displacement monitoring module, 6-2, second displacement monitoring module, 7, over speed protection, 7-1, first tests the speed block, 7-2, second tests the speed block, 7-3, 3rd tests the speed block, 7-4, 4th tests the speed block, and 8, tripping controller, 9, AST solenoid valve group, 10, external or door, 11, alarm.
Embodiment
Accompanying drawings embodiment of the present utility model, the turbine emergency trip system of present embodiment, comprises the first PLC 1, second PLC 2, EH oil controll block 3, vacuum control block 4, lubricant oil controll block 5, axial displacement monitor unit 6, over speed protection 7, tripping controller 8, external or door 10, alarm 11 and AST solenoid valve group 9, described EH oil controll block 3 is provided with an EH pressure switch 3-1, 2nd EH pressure switch 3-2, 3rd EH pressure switch 3-3 and the 4th EH pressure switch 3-4, vacuum control block 4 is provided with the first vacuum pressure switch 4-1, second vacuum pressure switch 4-2, 3rd vacuum pressure switch 4-3 and the 4th vacuum pressure switch 4-4, lubricant oil controll block 5 is provided with the first lubricating oil pressure switch 5-1, second lubricating oil pressure switch 5-2, 3rd lubricating oil pressure switch 5-3 and the 4th lubricating oil pressure switch 5-4, described axial displacement monitor unit 6 comprises the first displacement monitoring module 6-1 and the second displacement monitoring module 6-2, and described over speed protection 7 comprises first and to test the speed block 7-1, second tests the speed block 7-2, the 3rd block 7-3 and the 4th that tests the speed tests the speed block 7-4,
Be provided with first or door 1-1, second or door 1-2, the 3rd or door 1-3, the 4th or door 1-4 and first and door 1-5 in described first PLC, in the second PLC, be provided with the 5th or door 2-1, the 6th or door 2-2, the 7th or door 2-3, the 8th or door 2-4 and second and door 2-5;
One EH pressure switch 3-1 of described EH oil controll block 3 and the 3rd EH pressure switch 3-3 are connected the input end of first or door 1-1 respectively by wire, first vacuum pressure switch 4-1 of vacuum control block 4 and the 3rd vacuum pressure switch 4-3 are connected the input end of second or door 1-2 respectively by wire, first lubricating oil pressure switch 5-1 of lubricant oil controll block 5 and the 3rd lubricating oil pressure switch 5-3 are connected the input end of the 3rd or door 1-3 respectively by wire, first of over speed protection 7 block 7-1 and the 3rd block 7-3 that tests the speed that tests the speed is connected the input end of the 4th or door 1-4 by wire, first or door 1-1 output terminal, second or 1-2 gate output terminal, 3rd or door 1-3 output terminal, 4th or door 1-4 output terminal and the first displacement monitoring module 6-1 output terminal respectively by wire and first and the input end of door 1-5 connect, first is connected by wire and input end that is external or door 10 with the output terminal of door 1-5, 2nd EH pressure switch 3-2 of described EH oil controll block 3 and the 4th EH pressure switch 3-4 are connected the input end of the 5th or door 2-1 respectively by wire, second vacuum pressure switch 4-2 of vacuum control block 4 and the 4th vacuum pressure switch 4-4 are connected the input end of the 6th or door 2-2 respectively by wire, second lubricating oil pressure switch 5-2 of lubricant oil controll block 5 and the 4th lubricating oil pressure switch 5-4 are connected the input end of the 7th or door 2-3 respectively by wire, second of over speed protection 7 block 7-2 and the 4th block 7-4 that tests the speed that tests the speed is connected the input end of the 8th or door 2-4 by wire, 5th or door 2-1 output terminal, 6th or door 2-2 output terminal, 7th or door 2-3 output terminal, 8th or door 2-4 output terminal and the second displacement monitoring module 6-2 output terminal respectively by wire and second and the input end of door 2-5 connect, second is connected by wire and input end that is external or door 10 with the output terminal of door 2-5, input end that is external or door 10 connects the input end of tripping controller 8 by wire, the output terminal of tripping controller 8 is connected by wire with AST solenoid valve group 9 and alarm 11 respectively.
Described first PLC 1 is connected independent PLC power supply respectively with the second PLC 2.
Described turbine emergency trip system comprises protection throwing and moves back device, described protection throwing is moved back device inside and is provided with logic control panel, protection throwing is moved back device outside and is provided with EH oil pressure switch, vacuum switch, oil cock, axial displacement switch, over speed switch and taboo throw tutorial light, described EH oil controll block 3, vacuum control block 4, lubricant oil controll block 5, axial displacement monitor unit 6 and over speed protection 7 connect respectively by the input end of wire andlogic control plate, the output terminal of logic control panel by wire respectively with EH oil pressure switch, vacuum switch, oil cock, axial displacement switch, over speed switch and taboo are thrown tutorial light correspondence and are connected.
Working procedure of the present utility model is: steam turbine operates, described EH oil controll block 3, vacuum control block 4, lubricant oil controll block 5, axial displacement monitor unit 6 and over speed protection 7 detect respective data, when data occur abnormal, and an EH pressure switch 3-1, 2nd EH pressure switch 3-2, 3rd EH pressure switch 3-3, 4th EH pressure switch 3-4, first vacuum pressure switch 4-1, second vacuum pressure switch 4-2, 3rd vacuum pressure switch 4-3, 4th vacuum pressure switch 4-4, first lubricating oil pressure switch 5-1, second lubricating oil pressure switch 5-2, 3rd lubricating oil pressure switch 5-3 and the 4th lubricating oil pressure switch 5-4 correspondence is closed, EH oil controll block 3, vacuum control block 4 and lubricant oil controll block 5 send abnormal signal to the first PLC 1 or the second PLC 2, when axial displacement monitor unit 6 and over speed protection 7 detect abnormal data, abnormal signal is sent to the first PLC 1 or the second PLC 2, after " or-and " process being carried out to signal by the logical construction in the first PLC 1 or the second PLC 2, signal is sent in tripping controller 8, solenoid valve in tripping controller Controlling solenoid valve group 9, steam turbine is tripped, simultaneously, tripping controller 8 sends alarm signal to alarm, and operator can be processed in time, data are delivered to protection and are thrown the logic control panel of moving back device by described EH oil controll block 3, vacuum control block 4, lubricant oil controll block 5, axial displacement monitor unit 6 and over speed protection 7 simultaneously, the tutorial light moved back on device is thrown by protection, control operating switch, throwing is carried out to whole system and moves back management, thus play the function protected and throw and move back.
Claims (3)
1. turbine emergency trip system, comprises the first PLC (1), second PLC (2), EH oil controll block (3), vacuum control block (4), lubricant oil controll block (5), axial displacement monitor unit (6), over speed protection (7), tripping controller (8), external or door (10), alarm (11) and AST solenoid valve group (9), described EH oil controll block (3) is provided with an EH pressure switch (3-1), 2nd EH pressure switch (3-2), 3rd EH pressure switch (3-3) and the 4th EH pressure switch (3-4), vacuum control block (4) is provided with the first vacuum pressure switch (4-1), second vacuum pressure switch (4-2), 3rd vacuum pressure switch (4-3) and the 4th vacuum pressure switch (4-4), lubricant oil controll block (5) is provided with the first lubricating oil pressure switch (5-1), second lubricating oil pressure switch (5-2), 3rd lubricating oil pressure switch (5-3) and the 4th lubricating oil pressure switch (5-4), described axial displacement monitor unit (6) comprises the first displacement monitoring module (6-1) and the second displacement monitoring module (6-2), and described over speed protection (7) comprises first and to test the speed block (7-1), second tests the speed block (7-2), 3rd block (7-3) and the 4th that tests the speed tests the speed block (7-4),
It is characterized in that: in described first PLC, be provided with first or door (1-1), second or door (1-2), the 3rd or door (1-3), the 4th or door (1-4) and first and door (1-5), in the second PLC, be provided with the 5th or door (2-1), the 6th or door (2-2), the 7th or door (2-3), the 8th or door (2-4) and second and door (2-5);
The one EH pressure switch (3-1) of described EH oil controll block (3) and the 3rd EH pressure switch (3-3) are connected the input end of first or door (1-1) respectively by wire, first vacuum pressure switch (4-1) of vacuum control block (4) and the 3rd vacuum pressure switch (4-3) are connected the input end of second or door (1-2) respectively by wire, first lubricating oil pressure switch (5-1) of lubricant oil controll block (5) and the 3rd lubricating oil pressure switch (5-3) are connected the input end of the 3rd or door (1-3) respectively by wire, first of over speed protection (7) block (7-1) and the 3rd block (7-3) that tests the speed that tests the speed is connected the input end of the 4th or door (1-4) by wire, first or door (1-1) output terminal, second or (1-2) gate output terminal, 3rd or door (1-3) output terminal, 4th or door (1-4) output terminal and the first displacement monitoring module (6-1) output terminal respectively by wire and first and the input end of door (1-5) connect, first is connected by wire and input end that is external or door (10) with the output terminal of door (1-5), the 2nd EH pressure switch (3-2) of described EH oil controll block (3) and the 4th EH pressure switch (3-4) are connected the input end of the 5th or door (2-1) respectively by wire, second vacuum pressure switch (4-2) of vacuum control block (4) and the 4th vacuum pressure switch (4-4) are connected the input end of the 6th or door (2-2) respectively by wire, second lubricating oil pressure switch (5-2) of lubricant oil controll block (5) and the 4th lubricating oil pressure switch (5-4) are connected the input end of the 7th or door (2-3) respectively by wire, second of over speed protection (7) block (7-2) and the 4th block (7-4) that tests the speed that tests the speed is connected the input end of the 8th or door (2-4) by wire, 5th or door (2-1) output terminal, 6th or door (2-2) output terminal, 7th or door (2-3) output terminal, 8th or door (2-4) output terminal and the second displacement monitoring module (6-2) output terminal respectively by wire and second and the input end of door (2-5) connect, second is connected by wire and input end that is external or door (10) with the output terminal of door (2-5), input end that is external or door (10) connects the input end of tripping controller (8) by wire, the output terminal of tripping controller (8) is connected by wire with AST solenoid valve group (9) and alarm (11) respectively.
2. turbine emergency trip system according to claim 1, is characterized in that: described first PLC (1) is connected independent PLC power supply respectively with the second PLC (2).
3. turbine emergency trip system according to claim 2, it is characterized in that: described turbine emergency trip system comprises protection throwing and moves back device, described protection throwing is moved back device inside and is provided with logic control panel, protection throwing is moved back device outside and is provided with EH oil pressure switch, vacuum switch, oil cock, axial displacement switch, over speed switch and taboo throw tutorial light, described EH oil controll block (3), vacuum control block (4), lubricant oil controll block (5), axial displacement monitor unit (6) and over speed protection (7) connect respectively by the input end of wire andlogic control plate, the output terminal of logic control panel by wire respectively with EH oil pressure switch, vacuum switch, oil cock, axial displacement switch, over speed switch and taboo are thrown tutorial light correspondence and are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420643555.3U CN204163775U (en) | 2014-10-31 | 2014-10-31 | Turbine emergency trip system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420643555.3U CN204163775U (en) | 2014-10-31 | 2014-10-31 | Turbine emergency trip system |
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| CN204163775U true CN204163775U (en) | 2015-02-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863646A (en) * | 2015-05-29 | 2015-08-26 | 马鞍山当涂发电有限公司 | Supercritical unit water-feeding pump turbine protection system and use method thereof |
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2014
- 2014-10-31 CN CN201420643555.3U patent/CN204163775U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863646A (en) * | 2015-05-29 | 2015-08-26 | 马鞍山当涂发电有限公司 | Supercritical unit water-feeding pump turbine protection system and use method thereof |
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