CN107065760A - Power station pressure regulation valve control system - Google Patents
Power station pressure regulation valve control system Download PDFInfo
- Publication number
- CN107065760A CN107065760A CN201710430224.XA CN201710430224A CN107065760A CN 107065760 A CN107065760 A CN 107065760A CN 201710430224 A CN201710430224 A CN 201710430224A CN 107065760 A CN107065760 A CN 107065760A
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- Prior art keywords
- pressure
- controller
- control button
- limit switch
- valve
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- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 239000003643 water by type Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/15—Plc structure of the system
- G05B2219/15005—Set switches defining control function
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention discloses a kind of power station pressure regulation valve control system, with controller, display screen, digital balance valve actuator, digital balance valve, servomotor, pressure regulator valve, mode control button, manual control button, limit switch, hydraulic pressure pressure gauge, it is simple in construction, power station can be replaced to replace surge shaft or surge tower to solve pressure and the problem of rotating speed rises；System integrates manually and automatically, meets the safe operation of medium waterpower generator station unit in all cases, it is adaptable to all power stations.
Description
Technical field is the present invention relates to a kind of control system, the control system especially used on the pressure regulator valve of power station.
During background technology hydroelectric station operation, when the unexpected removal of load of turbine-generator units, if governing system is acted
Slow, rotating speed can rise quickly, the overvoltage not allowed occur, may cause the insulation damages of generator.Therefore, when water wheels are sent out
During the unexpected removal of load of group of motors, speed regulator can automatically control hydraulic turbine quick closedown stator.And quick closedown stator can cause pressure
Hydraulic pressure rapid increase in power conduit pipe, easily occurs the security incidents such as booster.Therefore, generally using setting surge shaft or pressure regulation
The methods such as valve solve pressure and the problem of rotating speed rises.And some power stations are limited to landform, geological conditions, it is difficult to build pressure regulation
Well.Therefore, medium waterpower generator station is more suitable for solving pressure using pressure regulator valve and the problem of rotating speed rises.In addition, Hydropower Unit
Because of normal service or emergency shutdown, it is necessary to solve pressure by manipulating pressure regulator valve and the problem of rotating speed rises.
The content of the invention is present invention aim to provide a kind of power station pressure regulation valve control system, beneficial to middle-size and small-size water
Power station solves pressure and the problem of rotating speed rises by manipulating pressure regulator valve in all cases.
In order to achieve the above object, the power station pressure regulation valve control system that the present invention is provided has controller, display screen, number
Word balance valve actuator, digital balance valve, servomotor, pressure regulator valve, mode control button, manual control button, limit switch, water
Pressure pressure table, wherein,
Controller, digital balance valve actuator, digital balance valve, servomotor and pressure regulator valve are sequentially connected；Servomotor is connected
Controller；Display screen connects controller；Mode control button connects manual control button and limit switch respectively；Control is pressed manually
Button and limit switch connect digital balance valve actuator respectively；Hydraulic pressure pressure gauge connects limit switch；Hydraulic pressure pressure gauge and pressure regulation
Valve is all positioned in conduit pipe；
Mode control button controls being turned on and off for manual control button and limit switch by select button；Selection
After manual control button is opened, control controller to send instruction by manual control button, pass through digital balance valve actuator, number
Word balanced valve and servomotor and reach control pressure regulator valve be turned on and off, the status information of servomotor and pressure regulator valve passes through connecting line
Controller is returned to, the status displaying information of servomotor and pressure regulator valve is sent to display screen by controller；
Hydraulic pressure pressure gauge is electro connecting pressure gauge, and limit switch is the serial travel switches of the western LXK3 of moral power；Limit switch profit
Make its contact action with the collision of manufacturing machine moving component to realize three output orders：Closing, half-open and standard-sized sheet, three defeated
Go out instruction to be connected with controller corresponding interface by connecting line；The contact set on electro connecting pressure gauge is two：Middle pressure contact
And high-voltage contact, middle pressure contact position is 1.3 times of normal hydraulic pressure positions, and high-voltage contact position is 1.5 times of normal hydraulic pressure positions；Mould
After formula control button selection limit switch is opened, opened when electric contact pressure list index is rotated in below middle pressure contact by spacing
Output out code is closed, it is defeated by limit switch when electric contact pressure list index is rotated between middle pressure contact and high-voltage contact
Go out half-open instruction, exporting standard-sized sheet by limit switch when electric contact pressure list index is rotated in above high-voltage contact instructs；Electricity
Contact pressure table and travel switch are common apparatus, above-mentioned corresponding operation and setting, those skilled in the art
Complete, just repeat no more here.
Controller is programmable controller, and K120S series of PLC is produced electricity using LS；Programmable controller, i.e. PLC are a kind of
Exclusively for the electronic installation for the digital operation applied and designed in industrial settings；Programmable controller use can be worked out
The memory of program, for being operated in its computing of storage inside execution logic, sequential operation, timing, counting and arithmetical operation etc.
Instruction, and can by digital or analog input and output, control it is various types of machinery or production processes.K120S
Series of PLC is using flexibly, and the general character is strong, it is only necessary to corresponding input/output signal line is accessed on PLC terminals.Change control function
When, support online or remote line modification program.These operations and setting, those skilled in the art can complete, here just no longer
Repeat.
In addition, digital balance valve actuator, digital balance valve, servomotor and pressure regulator valve are equipment generally in the art, control
The mode that device processed, digital balance valve actuator, digital balance valve, servomotor and pressure regulator valve are sequentially connected is general knowledge, this area
Technical staff can complete, and just repeat no more here.
When the invention is employed, it is necessary to when actively shutting down, be selected by mode control button after manual control button unlatching,
Instruction is sent to controller by manual control button, pressure regulator valve is completed and is turned on and off operation, controller is by servomotor and tune
The status displaying information of pressure valve is sent to display screen；When needing to automatically control, limit switch is selected to open by mode control button
Qi Hou, electro connecting pressure gauge and travel switch send closing to controller jointly, the instruction of half-open and standard-sized sheet, complete pressure regulator valve and close
Close, half-open and standard-sized sheet is operated, while the status displaying information of servomotor and pressure regulator valve is sent to display screen by controller.
The power station pressure regulation valve control system that the present invention is provided has positive effect：With controller, display screen, numeral
Balance valve actuator, digital balance valve, servomotor, pressure regulator valve, mode control button, manual control button, limit switch, hydraulic pressure
Pressure gauge, it is simple in construction, power station can be replaced to replace surge shaft or surge tower to solve pressure and the problem of rotating speed rises；
System integrates manually and automatically, meets the safe operation of medium waterpower generator station unit in all cases, it is adaptable to all
Power station.
The brief description of the drawings present invention will be further described with reference to accompanying drawing, refer to accompanying drawing：
Fig. 1 represents the principle schematic diagram of the present invention.
Structure shown in accompanying drawing 1 includes：Hydraulic pressure pressure gauge 1, controller 2, limit switch 3, mode control button 4, manually
Control button 5, display screen 6, digital balance valve actuator 7, digital balance valve 8, servomotor 9, pressure regulator valve 10.
The power station pressure regulation valve control system that the embodiment present invention is provided has controller 2, display screen 6, numeral
Balance valve actuator 7, digital balance valve 8, servomotor 9, pressure regulator valve 10, mode control button 4, manual control button 5, spacing open
3, hydraulic pressure pressure gauge 1 is closed, wherein,
Controller 2, digital balance valve actuator 7, digital balance valve 8, servomotor 9 and pressure regulator valve 10 are sequentially connected；Relay
Device 9 connects controller 2；Display screen 6 connects controller 2；Mode control button 4 connects manual control button 5 and spacing opened respectively
Close 3；Manual control button 5 and limit switch 3 connect digital balance valve actuator 7 respectively；Hydraulic pressure pressure gauge 1 connects limit switch
3；Hydraulic pressure pressure gauge 1 and pressure regulator valve 10 are all positioned in conduit pipe；
Mode control button 4 controls being turned on and off for manual control button 5 and limit switch 3 by select button；
Select after the unlatching of manual control button 5, control controller 2 to send instruction by manual control button 5, driven by digital balance valve
Move device 7, digital balance valve 8 and servomotor 9 and reach that control pressure regulator valve 10 is turned on and off, the shape of servomotor 9 and pressure regulator valve 10
State information returns to controller 2 by connecting line, and the status displaying information of servomotor 9 and pressure regulator valve 10 is sent to aobvious by controller 2
Display screen 6；
Hydraulic pressure pressure gauge 1 is electro connecting pressure gauge, and limit switch 3 is the serial travel switches of the western LXK3 of moral power；Limit switch 3
Make its contact action using the collision of manufacturing machine moving component to realize three output orders：Closing, half-open and standard-sized sheet, three
Output order is connected by connecting line with the corresponding interface of controller 2；The contact set on electro connecting pressure gauge is two：Middle pressure is touched
Head and high-voltage contact, middle pressure contact position are 1.3 times of normal hydraulic pressure positions, and high-voltage contact position is 1.5 times of normal hydraulic pressure positions；
After the selection limit switch 3 of mode control button 4 is opened, when electric contact pressure list index is rotated in below middle pressure contact by limit
Bit switch 3 exports out code, when electric contact pressure list index is rotated between middle pressure contact and high-voltage contact by spacing
The half-open instruction of the output of switch 3, standard-sized sheet is exported when electric contact pressure list index is rotated in above high-voltage contact by limit switch 3
Instruction；Electro connecting pressure gauge and travel switch are common apparatus, above-mentioned corresponding operation and setting, those skilled in the art
Member can complete, and just repeat no more here.
Controller 2 is programmable controller 2, and K120S series of PLC is produced electricity using LS；Programmable controller 2, i.e. PLC are one
Plant the electronic installation exclusively for the digital operation applied and designed in industrial settings；Programmable controller 2 is used can be with
The memory programmed, in its computing of storage inside execution logic, sequential operation, timing, counting and arithmetical operation etc.
The instruction of operation, and various types of machineries or production process can be controlled by digital or analog input and output.
K120S series of PLC is using flexibly, and the general character is strong, it is only necessary to corresponding input/output signal line is accessed on PLC terminals.Change control
During function processed, online or remote line modification program is supported.These operations and setting, those skilled in the art can complete, here
Just repeat no more.
In addition, digital balance valve actuator 7, digital balance valve 8, servomotor 9 and pressure regulator valve 10 are generally in the art set
Standby, the mode that controller 2, digital balance valve actuator 7, digital balance valve 8, servomotor 9 and pressure regulator valve 10 are sequentially connected is normal
Know, those skilled in the art can complete, just repeat no more here.
When the invention is employed, it is necessary to when actively shutting down, select manual control button 5 to open by mode control button 4
Afterwards, instruction is sent to controller 2 by manual control button 5, completes pressure regulator valve 10 and be turned on and off operation, controller 2 will connect
The status displaying information of power device 9 and pressure regulator valve 10 is sent to display screen 6；When needing to automatically control, selected by mode control button 4
Select after limit switch 3 opens, electro connecting pressure gauge and travel switch send closing to controller 2 jointly, half-open and standard-sized sheet is instructed,
Complete pressure regulator valve 10 close, the operation of half-open and standard-sized sheet, while controller 2 is by servomotor 9 and the status displaying information of pressure regulator valve 10
It is sent to display screen 6.
The scope of the present invention is related to all the above version.
Claims (1)
1. a kind of power station pressure regulation valve control system, it is characterised in that：With controller (2), display screen (6), digital balance valve
Driver (7), digital balance valve (8), servomotor (9), pressure regulator valve (10), mode control button (4), manual control button (5),
Limit switch (3), hydraulic pressure pressure gauge (1)；
Controller (2), digital balance valve actuator (7), digital balance valve (8), servomotor (9) and pressure regulator valve (10) connect successively
Connect；Servomotor (9) connection controller (2)；Display screen (6) connection controller (2)；Mode control button (4) is connected manually respectively
Control button (5) and limit switch (3)；Manual control button (5) and limit switch (3) connect digital balance valve actuator respectively
(7)；Hydraulic pressure pressure gauge (1) connection limit switch (3)；Hydraulic pressure pressure gauge (1) and pressure regulator valve (10) are all positioned in conduit pipe；
Mode control button (4) controls unlatching or the pass of manual control button (5) and limit switch (3) by select button
Close；Select after manual control button (5) unlatching, control controller (2) to send instruction by manual control button (5), pass through number
Word balances valve actuator (7), digital balance valve (8) and servomotor (9) and reaches that control pressure regulator valve (10) is turned on and off, relay
The status information of device (9) and pressure regulator valve (10) returns to controller (2) by connecting line, and controller (2) is by servomotor (9) and pressure regulation
The status displaying information of valve (10) is sent to display screen (6)；
Hydraulic pressure pressure gauge (1) is electro connecting pressure gauge, and limit switch (3) is the serial travel switches of the western LXK3 of moral power；Limit switch
(3) make its contact action using the collision of manufacturing machine moving component to realize three output orders：Closing, half-open and standard-sized sheet,
Three output orders are connected by connecting line with controller (2) corresponding interface；The contact set on electro connecting pressure gauge is two：
Middle pressure contact and high-voltage contact, middle pressure contact position are 1.3 times of normal hydraulic pressure positions, and high-voltage contact position is 1.5 times of normal waters
Press position；After mode control button (4) selection limit switch (3) is opened, when electric contact pressure list index is rotated in middle pressure contact
Out code is exported by limit switch (3) during lower section, when electric contact pressure list index is rotated in middle pressure contact and high-voltage contact
Between when half-open instruction is exported by limit switch (3), pass through when electric contact pressure list index is rotated in high-voltage contact top
Limit switch (3) output standard-sized sheet instruction；
Controller (2) is programmable controller (2), and K120S series of PLC is produced electricity using LS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710430224.XA CN107065760A (en) | 2017-06-05 | 2017-06-05 | Power station pressure regulation valve control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710430224.XA CN107065760A (en) | 2017-06-05 | 2017-06-05 | Power station pressure regulation valve control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107065760A true CN107065760A (en) | 2017-08-18 |
Family
ID=59616628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710430224.XA Pending CN107065760A (en) | 2017-06-05 | 2017-06-05 | Power station pressure regulation valve control system |
Country Status (1)
| Country | Link |
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| CN (1) | CN107065760A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107905187A (en) * | 2017-11-27 | 2018-04-13 | 新疆北方建设集团有限公司 | Method for arranging of the heavy caliber pressure regulator valve in power station |
| CN108693826A (en) * | 2018-08-01 | 2018-10-23 | 峨眉山长庆新材料有限公司 | The continuity uniform feeding structure of silicon tetrachloride storage tank |
| CN109213218A (en) * | 2018-09-18 | 2019-01-15 | 四川勃朗蜀威科技有限公司 | One kind being based on hydroelectric valve control system |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11304362A (en) * | 1998-04-24 | 1999-11-05 | Nikkiso Co Ltd | Controller for burner combustion in copper melting furnace |
| JP2006201855A (en) * | 2005-01-18 | 2006-08-03 | Nohmi Bosai Ltd | Automatic pressure-regulating valve |
| CN101619778A (en) * | 2009-08-10 | 2010-01-06 | 山东省科学院能源研究所 | Electric auto-control pressure regulating valve for micro-reaction equipment |
| CN201424993Y (en) * | 2009-06-16 | 2010-03-17 | 武汉四创自动控制技术有限责任公司 | Mechanical hydraulic control device for water conduit pressure-regulating valve |
| CN201809806U (en) * | 2010-10-13 | 2011-04-27 | 济南水业集团有限责任公司 | Linked variable-frequency constant-pressure water supply system of pump valve |
| CN102536619A (en) * | 2012-01-06 | 2012-07-04 | 天津电气传动设计研究所 | Pressure regulating valve of water turbine volute casing |
| CN203070093U (en) * | 2012-12-25 | 2013-07-17 | 西安航天远征流体控制股份有限公司 | Heavy type automobile gearbox control system controlling element life test bench |
| CN203276076U (en) * | 2013-06-17 | 2013-11-06 | 黄昌华 | Automatic high-pressure oxygen control system of oxygen generating equipment |
| CN204283709U (en) * | 2014-12-05 | 2015-04-22 | 峨眉山市驰骋机械制造有限公司 | The manipulation of Horizontal displacement two-chamber is without spring formula water turbine nozzle |
| CN204328161U (en) * | 2014-12-18 | 2015-05-13 | 福建省图腾机械制造有限公司 | A kind of new type of airflow vacuum reversal valve |
| CN105651482A (en) * | 2015-12-29 | 2016-06-08 | 中国航天空气动力技术研究院 | Control system and method of stop valve and total pressure regulating valve in hypersonic wind tunnel |
| JP2016176598A (en) * | 2015-03-19 | 2016-10-06 | 本田技研工業株式会社 | Control device of vehicle |
| CN207020517U (en) * | 2017-06-05 | 2018-02-16 | 峨眉山市驰骋机械制造有限公司 | Power station pressure regulation valve control system |
-
2017
- 2017-06-05 CN CN201710430224.XA patent/CN107065760A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11304362A (en) * | 1998-04-24 | 1999-11-05 | Nikkiso Co Ltd | Controller for burner combustion in copper melting furnace |
| JP2006201855A (en) * | 2005-01-18 | 2006-08-03 | Nohmi Bosai Ltd | Automatic pressure-regulating valve |
| CN201424993Y (en) * | 2009-06-16 | 2010-03-17 | 武汉四创自动控制技术有限责任公司 | Mechanical hydraulic control device for water conduit pressure-regulating valve |
| CN101619778A (en) * | 2009-08-10 | 2010-01-06 | 山东省科学院能源研究所 | Electric auto-control pressure regulating valve for micro-reaction equipment |
| CN201809806U (en) * | 2010-10-13 | 2011-04-27 | 济南水业集团有限责任公司 | Linked variable-frequency constant-pressure water supply system of pump valve |
| CN102536619A (en) * | 2012-01-06 | 2012-07-04 | 天津电气传动设计研究所 | Pressure regulating valve of water turbine volute casing |
| CN203070093U (en) * | 2012-12-25 | 2013-07-17 | 西安航天远征流体控制股份有限公司 | Heavy type automobile gearbox control system controlling element life test bench |
| CN203276076U (en) * | 2013-06-17 | 2013-11-06 | 黄昌华 | Automatic high-pressure oxygen control system of oxygen generating equipment |
| CN204283709U (en) * | 2014-12-05 | 2015-04-22 | 峨眉山市驰骋机械制造有限公司 | The manipulation of Horizontal displacement two-chamber is without spring formula water turbine nozzle |
| CN204328161U (en) * | 2014-12-18 | 2015-05-13 | 福建省图腾机械制造有限公司 | A kind of new type of airflow vacuum reversal valve |
| JP2016176598A (en) * | 2015-03-19 | 2016-10-06 | 本田技研工業株式会社 | Control device of vehicle |
| CN105651482A (en) * | 2015-12-29 | 2016-06-08 | 中国航天空气动力技术研究院 | Control system and method of stop valve and total pressure regulating valve in hypersonic wind tunnel |
| CN207020517U (en) * | 2017-06-05 | 2018-02-16 | 峨眉山市驰骋机械制造有限公司 | Power station pressure regulation valve control system |
Non-Patent Citations (1)
| Title |
|---|
| 蒋永勉: "水电站调速器与调压阀的组合应用及常见故障" * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107905187A (en) * | 2017-11-27 | 2018-04-13 | 新疆北方建设集团有限公司 | Method for arranging of the heavy caliber pressure regulator valve in power station |
| CN108693826A (en) * | 2018-08-01 | 2018-10-23 | 峨眉山长庆新材料有限公司 | The continuity uniform feeding structure of silicon tetrachloride storage tank |
| CN109213218A (en) * | 2018-09-18 | 2019-01-15 | 四川勃朗蜀威科技有限公司 | One kind being based on hydroelectric valve control system |
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Application publication date: 20170818 |