CN2890543Y - Special environment valve controller - Google Patents
Special environment valve controller Download PDFInfo
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- CN2890543Y CN2890543Y CN 200620033984 CN200620033984U CN2890543Y CN 2890543 Y CN2890543 Y CN 2890543Y CN 200620033984 CN200620033984 CN 200620033984 CN 200620033984 U CN200620033984 U CN 200620033984U CN 2890543 Y CN2890543 Y CN 2890543Y
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Abstract
The utility model provides a special environment valve controller utilized for the accurate positioning of inlet system and rev-participating control of a steam turbine. The utility model comprises a main board arranged in a control box, an operation display panel, a wiring board and a software part with an industrial-level single chip as the core and with a plurality of auxiliaries like programmable logic chip, real-time control, interrupt control and communication technologies, etc. the single-chip communication port is converted by RS485 communication drive into a standard RS485 port, thereby realizing the connection with other modules. A bar graphic display adopts SPI communication mode and gets directly connected with SPI port of single-chip set. A digital display and a digital keyboard are connected with the single-chip set by right of a digital display drive and a key-collection chip. Indicator light of state and functional keys and a rotary switch is directed connected with the universal I/O port of the single-chip set. External double-circuits power supply gets switched by a switch circuit and then acts as internal power supply. The voltage needs to be at varied levels according to the demand of sundry chips. The utility model can replace the products originally made in UK.
Description
Technical field
The utility model relates to the control of a kind of energy, chemical industry steam turbine air inlet quick closing valve valve.Be mainly used in the accurate location and the quick closedown of high temperature, high pressure, particular surroundings lower valve such as perishable.
Background technique
At present, the particular surroundings valve positioner of the domestic use of China mostly is Britain W.H.ALLEN company product, and China existing W.H.ALLEN company adjusting fast valve door controller is the analog circut product.The product that these products design during for early stage no monolithic technology, all regulating loops (comprising PID) all adopt the analog circut realization, and are backward in technique, rate of fault is high, influence production run.And domesticly can not find corresponding spare part, original equipment is repaired.The said firm's original equipment adopts two valves of a set of equipment control, and two valves all can not be controlled when equipment broke down.Simultaneously the valve control product on China existing market is the meters product, only can realize simple valve switch control, can't realize the valve quick closing valve, accurately location and rotating speed participate in the control function.The valve positioner function singleness of former simulation circuit only has close-loop control mode.Use potentiometer to adjust parameter, can't quantize for adjusting parameter (pid parameter).The fault-free identification function does not have indication and respective handling behind the signal fault.Adopt single power supply, if this road power failure, equipment will be by forced-stopping machine.Man-machine interface is unreasonable, can't read current actual valve position, valve position instruction.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art part, develops a kind of novel particular surroundings valve positioner.
The technology path that the utility model adopts is: using high performance single-chip microcomputer is hardware core, realizes the various functions of valve positioner by software.Adopt the single-chip microcomputer hardware core to change original analog circut regulating loop into digital regulating loop.The analog amount input signal is carried out capacitance-resistance filter at artificial circuit part, the A/D that carries through single-chip microcomputer (mould/number) transducer progressive die number conversion again, the conversion back adopts the modern digital filtering technique that it is carried out digital filtering.The analog amount output loop adopts the integrated operational amplifier of technical grade, and the voltage signal that single-chip microcomputer D/A (D/A) transducer is exported is converted to electric current output.The switching value input/output signal adopts photoelectric isolation technology, and all outside connected switch amount signals are isolated.Adopt the two-way power supply as the power devices power supply, behind any one road power failure in the outside duplex feeding power supply, equipment still can proper functioning.On single-chip microcomputer, adopt software mode to realize that PID regulates and various logic functions.Adopt software mode to finish the parameter set-up function, parameter is set and is adopted the numeral input, can onlinely adjust.The analog amount input signal is carried out malfunction monitoring, when breaking down, carry out malfunction alarm.Actual valve position, valve position instruction and Inter parameter all carry out numeral by nixie tube and show.
The purpose of this utility model is such realization: be included in the mainboard of installing on the control casing, the operation display board, wire board, with industrial control level singlechip chip is core, be aided with multiple programmable logic chip and control in real time, interruption control, software sections such as mechanics of communication, it is valve position feedback, rotating speed is directly sent into single-chip simulation amount input pin with reference to analog signals after mould is gone into buffer, be converted to digital quantity signal by the inner A/D converter of single-chip microcomputer, the valve control data is again by delivering to voltage/current conversion loop with voltage system behind the inner D/A converter of single-chip microcomputer, direct control valve electro-hydraulic device after the voltage/current conversion, low fuel pressure, switching value signals such as main stop valve standard-sized sheet are directly delivered to controller general digital quantity I/O mouth behind optoelectronic isolator, the microcontroller communication interface is converted to standard RS485 interface after by the RS485 communication driver, realize and other module networking, the light beam display modular adopts the SPI communication modes directly to be connected with single-chip microcomputer SPI interface, the realization light beam shows, digital demonstration and numeric keyboard are connected with single-chip microcomputer by digital display driver and button acquisition chip, status indicator lamp, function button, rotary switch directly is connected with controller general I/O mouth, outside double loop power supply as internal electric source, and is different electric pressures according to the needs voltage stabilizing of each chip after switching circuit switches.
Described single-chip microcomputer adopts integrated mixed-signal system level single-chip microcomputer C8051F020, and digital display driver and button acquisition chip adopt the CH451S chip, and light beam shows employing MZ012.008Z light beam display modular.
Described mould is gone into buffer and is formed mould and gone into buffer by selectable 120 Ω sample resistances, 0.1 μ filter capacitor, LM224 voltage follower, prevents that external high pressure from damaging unit.Selecting when being input as current signal has sample resistance, is voltage signal with current conversion, selects no sample resistance when being input as voltage signal, and voltage signal is directly delivered to single-chip simulation amount input interface behind voltage follower.
Described mould goes out converter and forms mould by integrated operational amplifier LM258, triode 9013, triode TI P42, triode 9012, diode 1N4148, resistance etc. and go out converter.AO00 is a single-chip simulation amount output signal (0～2.48VDC), AO00 delivers to U1A-3 behind voltage follower U3A, again through U1A, R25, R28, R33, Q1 on R25, form one with the proportional current signal of AO00 (0～4.96mA), this current signal forms the voltage drop of 0～1.24VDC on R25.Start back K switch 2 closures at valve positioner, U1B get this voltage signal through U1B, R29, R37, R38, Q3, K2 be converted to the final output current of EAO00 (0～564mA), be used for the drive controlling coil.
Described open to form by optoelectronic isolator TLP521-4, resistance into the optoelectronic isolator loop open into the optoelectronic isolator loop, when external switch amount junction closure, EDI is to the 0V short circuit, form the 6mA electric current in optoelectronic isolator TLP521-4 excitation side, make the optoelectronic isolator conducting, the output terminal DI of optoelectronic isolator is a low level, and it is " 0 " that single-chip microcomputer is gathered the DI signal.When external switch amount contact disconnects, optoelectronic isolator excitation side no current, optoelectronic isolator output disconnects, and the output terminal DI of optoelectronic isolator is a high level, and it is " 1 " that single-chip microcomputer is gathered the DI signal.
The described isolated loop of leaving is made up of optoelectronic isolator TIL113, yellow light-emitting diode, output relay DS-2Y-S-24V, discharge diode 1N4148, resistance and is left isolated loop.DO is single-chip microcomputer output, when single-chip microcomputer is output as " 0 ", makes and leaves tutorial light LED-Y and light, form the 8.4mA electric current in optoelectronic isolator TIL113 excitation side simultaneously, make the optoelectronic isolator conducting, relay DS-2Y-S-24V coil is charged, relay output contact closure.
Described power supply adopts the duplex feeding power supply, and this power supply adopts diode to switch, the 1# power supply through a diode as internal electric source, the 2# power supply through two diodes as internal electric source.
Described control box casing is to have compatible profile, case lid adopts the 1mm steel plate to make, panel adopts the 6mm aluminium sheet to make, panel, case lid all adopt M3 * 8 sunk screws to be tightened on the control box casing, mainboard printed board, terminal board are installed on the control box casing by M3 * 8 screws, and light beam shows that printed board, numeral show and keypad is installed on the panel by M3 * 8 screws.
Control function of the present utility model has two kinds of open loop control, closed loop controls.At quick closing valve or default conditions is open loop control mode, in open loop control mode, and the valve position control command output that controller directly will manually be set, the control valve action need not valve position feedback, rotary speed reference signal (auxiliary signal) in this mode.Behind device start, under the normal situation of valve position feedback, can drop into close-loop control mode, after dropping into close-loop control mode, valve positioner receives the valve position control command of artificial setting the (setting by ON/OFF knob or numeral), and compares between the valve position feedback of analog amount input, when deviation occurring between the two, both differences are delivered to the PID regulator, behind position model PID regulator, the control valve action.When valve position feedback was identical with control command, the valve control signal of PID regulator output remained unchanged, and makes valve be stabilized in current location.Also can set rotating speed with reference to participation amount (percentage) at close-loop control mode, when rotary speed reference signal normal, be set with rotating speed when measuring with reference to participation, valve position feedback signal=rotary speed reference signal * the rotating speed that is used for PID calculating is with reference to participation amount+valve position feedback signal * (the 1-rotating speed is with reference to the participation amount), by the compensation of rotary speed reference signal to the valve position feedback signal, realize that rotating speed participates in control, if turbine speed raises fast in the Open valve process, then the amount that rotating speed is raise is superimposed upon in the valve position feedback, force valve to turn down by the PID adjusting, prevent that turbine speed from raising fast.Behind the valve position feedback signal fault, will automatically switch to open loop control mode at close-loop control mode.
The beneficial effects of the utility model are, this controller has closed loop, two kinds of functions of open loop control, adopt the digitizing parameter to set, can carry out malfunction alarm, adopt the redundant power supply design, the numeral that possesses the instruction of valve position and valve position shows, regulating loop adopts the digital pid computing, can reach the accurate location of valve, can receive the quick closing valve instruction and realize the valve quick closedown, can introduce tach signal and participate in control, guarantee the Security of controlled device.Adopt valve of a set of equipment control, when two valves, need to adopt two cover autonomous devices to control respectively, if a set of equipment fault only has a valve not control, minimizing accident scope.Can the update of original equipment be improved stable equipment operation, improve control accuracy, shorten customer equipment debugging cycle after changing.All circuit of the present utility model all are that prior art, described components and parts all can be bought in market, thereby implement easily.
Description of drawings
Fig. 1 is a controller box outline drawing of the present utility model.
Fig. 2 is the casing front panel schematic representation among Fig. 1.
Fig. 3 is the cabinet rear panel schematic representation among Fig. 1.
Fig. 4 is a valve position Principles of Regulation schematic representation of the present utility model.
Fig. 5 is a system architecture schematic representation of the present utility model.
Fig. 6 is the simulated measurement input circuit schematic diagram among Fig. 5.
Fig. 7 is the analogue quantity output circuit schematic diagram among Fig. 5.
Fig. 8 is the switching value input circlult schematic diagram among Fig. 5.
Fig. 9 is the switching value output circuit schematic diagram among Fig. 5.
Figure 10 is the dual power supply switching circuit schematic diagram among Fig. 5.
Figure 11 is a control flow schematic representation of the present utility model.
Figure 12 is the power supply architecture schematic representation among Fig. 5.
Embodiment
Regulate the fast valve door controller and comprise hardware, software two-part.
Hardware components comprises casing structure and circuit part.
With reference to Fig. 1-Fig. 3, the compatible former Britain of cabinet box shape energy of the present utility model W.H.ALLEN company product can be replaced former Britain W.H.ALLEN company product.Its case lid adopts the 1mm steel plate to make, and panel adopts the 6mm aluminium sheet to make.Panel, case lid all adopt M3 * 8 sunk screws to be tightened on the control box casing, mainboard printed board, terminal board are installed on the control box casing by M3 * 8 screws, and light beam shows that printed board, numeral show and keypad is installed on the panel by M3 * 8 screws.
With reference to Fig. 5, the utility model is gone into buffer, opens into optoelectronic isolator, is left power loops such as isolation, converter, power supply switching and form by single-chip microcomputer, light beam demonstration, numeric keyboard, function button, rotary switch, digital demonstration, status indicator lamp, digital display driver and button acquisition chip, RS485 communication driver, mould.Valve position feedback, rotating speed are directly sent into single-chip simulation amount input pin with reference to analog signals after mould is gone into buffer, be converted to digital quantity signal by the inner A/D converter of single-chip microcomputer and be used for internal calculation.Valve control data after single-chip microcomputer will calculate is delivered to voltage/current conversion loop with voltage system after by inner D/A converter, through the direct control valve electro-hydraulic device in voltage/current conversion back.Switching value signals such as low fuel pressure, main stop valve standard-sized sheet are directly delivered to controller general digital quantity I/O mouth behind optoelectronic isolator.The microcontroller communication interface is converted to standard RS485 interface after by the RS485 communication driver, realizes and other module networking.The light beam display modular adopts the SPI communication modes directly to be connected with single-chip microcomputer SPI interface, realizes that light beam shows.Digital demonstration and numeric keyboard are connected with single-chip microcomputer by digital display driver and button acquisition chip.Status indicator lamp, function button, rotary switch directly are connected with controller general I/O mouth.Outside double loop power supply as internal electric source, and is different electric pressures according to the needs voltage stabilizing of each chip after switching circuit switches.
Single-chip microcomputer adopts the integrated mixed-signal system level single-chip microcomputer C8051F020 of silicon company, and it is integrated, and 12 moulds of 8 passages go into, 12 moulds of 2 passages go out, UART serial communication function, hardware SPI serial communication, hardware SMBus/I
2C, 5 16 bit timing devices, built-in 64k byte FLASH program storage, built-in 4k byte inner RAM, 64 universaling I/O ports nearly.Digital display driver and button acquisition chip adopt the ooze CH451S chip of permanent Electronics Co., Ltd. of Nanjing, its integrated 8 nixie tube display driver, 64 key scans, SPI interface.Light beam shows the MZ012.008Z light beam display modular that adopts Deyang Winelec Technology Co., Ltd., and this light beam display modular has analog amount input interface and SPI interface, and display precision can reach 1/104.
Referring to Fig. 6, mould is gone into buffer and is made up of selectable 120 Ω sample resistances, 0.1 μ filter capacitor, LM224 voltage follower, prevents that external high pressure from damaging unit.Selecting when being input as current signal has sample resistance, is voltage signal with current conversion, selects no sample resistance when being input as voltage signal, and voltage signal is directly delivered to single-chip simulation amount input interface behind voltage follower.
Referring to Fig. 7, mould goes out converter and is made up of integrated operational amplifier LM258, triode 9013, triode TIP42, triode 9012, diode 1N4148, resistance etc.AO00 is a single-chip simulation amount output signal (0～2.48VDC), AO00 delivers to U1A-3 behind voltage follower U3A, again through U1A, R25, R28, R33, Q1 on R25, form one with the proportional current signal of AO00 (0～4.96mA), this current signal forms the voltage drop of 0～1.24VDC on R25.Start back K switch 2 closures at valve positioner, U1B get this voltage signal through U1B, R29, R37, R38, Q3, K2 be converted to the final output current of EAO00 (0～564mA), be used for the drive controlling coil.When if valve positioner does not start, K switch 2 disconnects, and U1B gets this voltage signal and is converted to the final output current of EAO00 through U1B, R29, R37, Q3 (0～0.62mA), this electric current can't the drive controlling coil, makes controlled valve remain on the complete shut-down state.K2 disconnects when quick closing valve, K2 closure when starting.The output current of U2A, R32, R27, the Q5 voltage detecting AO00 by detecting R 38 two ends, and be converted into current signal (0～4.96mA), deliver to analog amount input sampling loop.
Referring to Fig. 8, open into the optoelectronic isolator loop and form by optoelectronic isolator TLP521-4, resistance, when external switch amount junction closure, EDI is to the 0V short circuit, form the 6mA electric current in optoelectronic isolator TLP521-4 excitation side, make the optoelectronic isolator conducting, the output terminal DI of optoelectronic isolator is a low level, and it is " 0 " that single-chip microcomputer is gathered the DI signal.When external switch amount contact disconnects, optoelectronic isolator excitation side no current, optoelectronic isolator output disconnects, and the output terminal DI of optoelectronic isolator is a high level, and it is " 1 " that single-chip microcomputer is gathered the DI signal.
Referring to Fig. 9, leave isolation and form by optoelectronic isolator TIL113, yellow light-emitting diode, output relay DS-2Y-S-24V, discharge diode 1N4148, resistance.DO is single-chip microcomputer output, when single-chip microcomputer is output as " 0 ", makes and leaves tutorial light LED-Y and light, form the 8.4mA electric current in optoelectronic isolator TIL113 excitation side simultaneously, make the optoelectronic isolator conducting, relay DS-2Y-S-24V coil is charged, relay output contact closure.
Referring to Figure 10, Figure 12,1#24VA, 2#24VA are respectively two-way 24VDC power supply, 1#24VA through a diode as internal electric source, 2#24VA through two diodes as internal electric source, when identical or 2#24VA power supply disappears when outside two-way supply voltage, by 1#24VA as internal power supply, when 1#24VA disappear and the 2#24VA power supply just often, 2#24VA adopts diode to switch and can reach and switch unperturbed, nothing delay as internal power supply.
The software section function comprises: filtering of analog amount input digit and fault judgement, valve position adjusting, logic control and switching value I/O, button input and numeral demonstration, light beam show.
The valve positioner running is seen Figure 11 control flow, the device power initialization, and initiation parameter is read in system, installs the original state (complete shut-down state) that is equipped with.
Enter the loop control program behind the device initialize, gather the analog amount input signal,,, adopt digital filtering technique that mould is gone into signal simultaneously and handle except that on circuit, input signal being advanced the filtering for improving the precision of analog amount input signal.(analog amount is input as 4～20mA), and the fault judgement loop is judged as this analog input channel fault, the tutorial light flicker of light beam below when carrying out analog signals after digital filtering is handled less than 2.5mA.
Controller detects whether low fuel pressure or quick closing valve instruction are arranged, under any circumstance as low fuel pressure or when pressing the quick closing valve button, switching value output channel DOll makes relay K 2 dead electricity, the K2 contact that is connected in the analog amount output loop is disconnected, controller output will be reduced to 0mA rapidly, realize the quick closedown of valve.
Under the situation of normal, the no quick closing valve instruction of oil pressure, if the current standard-sized sheet lock state that is in has then judged whether the release button, if the release button is arranged then remove the standard-sized sheet lock state and only keep full-gear.If the current standard-sized sheet lock state that is not in has then judged whether the standard-sized sheet key command,, then install fully in the standard-sized sheet lock state, otherwise keep current state if standard-sized sheet key command, current valve position feedback are arranged greater than the standard-sized sheet condition.
After discharging and standard-sized sheet locking judges, if equipment is in the standard-sized sheet lock state, then controller output is fixed as standard-sized sheet output, and remains on 100%, can't change the output valve position by switch order.If equipment is not in the standard-sized sheet lock state, judge then whether valve position feedback is normal, if it is undesired then controller is placed open loop control mode, if normally then judge whether to switch to close-loop control mode, if switched to close-loop control mode then controller is placed close-loop control mode, otherwise controller is placed open loop control mode.
With reference to Fig. 4, when the valve position close-loop control mode, valve positioner receives the valve position control command of artificial setting the (setting by ON/OFF knob or numeral), and compare between the valve position feedback of analog amount input, when deviation occurring between the two, both differences are delivered to the PID regulator, behind position model PID regulator, by analog amount output AO00 output valve control signal, control valve action.When valve position feedback was identical with control command, the valve control signal of PID regulator output remained unchanged, and makes valve be stabilized in current location.
When the valve position open loop control mode, the valve position control command output that directly will manually set, control valve action.
Claims (8)
1. one kind is used for the particular surroundings valve positioner that the steam turbine air inlet is accurately located and the rotating speed participation is controlled, be included in the mainboard of installing on the control casing, the operation display board, wire board, with industrial control level singlechip chip is core, be aided with multiple programmable logic chip and control in real time, interruption control, software sections such as mechanics of communication, it is characterized in that: valve position feedback, rotating speed is directly sent into single-chip simulation amount input pin with reference to analog signals after mould is gone into buffer, be converted to digital quantity signal by the inner A/D converter of single-chip microcomputer, the valve control data is again by delivering to voltage/current conversion loop with voltage system behind the inner D/A converter of single-chip microcomputer, direct control valve electro-hydraulic device after the voltage/current conversion, low fuel pressure, switching value signals such as main stop valve standard-sized sheet are directly delivered to controller general digital quantity I/O mouth behind optoelectronic isolator, the microcontroller communication interface is converted to standard RS485 interface after by the RS485 communication driver, realize and other module networking, the light beam display modular adopts the SPI communication modes directly to be connected with single-chip microcomputer SPI interface, the realization light beam shows, digital demonstration and numeric keyboard are connected with single-chip microcomputer by digital display driver and button acquisition chip, status indicator lamp, function button, rotary switch directly is connected with controller general I/O mouth, outside double loop power supply as internal electric source, and is different electric pressures according to the needs voltage stabilizing of each chip after switching circuit switches.
2. particular surroundings valve positioner according to claim 1, it is characterized in that: single-chip microcomputer adopts integrated mixed-signal system level single-chip microcomputer C8051F020, digital display driver and button acquisition chip adopt the CH451S chip, and light beam shows employing MZ012.008Z light beam display modular.
3. particular surroundings valve positioner according to claim 1 is characterized in that: formed mould and gone into buffer by selectable 120 Ω sample resistances, 0.1 μ filter capacitor, LM224 voltage follower.
4. particular surroundings valve positioner according to claim 1 is characterized in that: form mould by integrated operational amplifier LM258, triode 9013, triode TIP42, triode 9012, diode 1N4148, resistance etc. and go out converter.
5. particular surroundings valve positioner according to claim 1 is characterized in that: be made up of optoelectronic isolator TLP521-4, resistance and open into the optoelectronic isolator loop.
6. particular surroundings valve positioner according to claim 1 is characterized in that: be made up of optoelectronic isolator TIL113, yellow light-emitting diode, output relay DS-2Y-S-24V, discharge diode 1N4148, resistance and leave isolated loop.
7. particular surroundings valve positioner according to claim 1, it is characterized in that: power supply adopts the duplex feeding power supply, this power supply adopts diode to switch, the 1# power supply through a diode as internal electric source, the 2# power supply through two diodes as internal electric source.
8. particular surroundings valve positioner according to claim 1, it is characterized in that: the control box casing is to have compatible profile, case lid adopts the 1mm steel plate to make, panel adopts the 6mm aluminium sheet to make, panel, case lid all adopt M3 * 8 sunk screws to be tightened on the control box casing, mainboard printed board, terminal board are installed on the control box casing by M3 * 8 screws, and light beam shows that printed board, numeral show and keypad is installed on the panel by M3 * 8 screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620033984 CN2890543Y (en) | 2006-04-25 | 2006-04-25 | Special environment valve controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620033984 CN2890543Y (en) | 2006-04-25 | 2006-04-25 | Special environment valve controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2890543Y true CN2890543Y (en) | 2007-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620033984 Expired - Fee Related CN2890543Y (en) | 2006-04-25 | 2006-04-25 | Special environment valve controller |
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| CN (1) | CN2890543Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101799671A (en) * | 2010-03-17 | 2010-08-11 | 德阳瑞能电力科技有限公司 | Regulation and control device of industrial turbine |
| CN103836212A (en) * | 2014-03-18 | 2014-06-04 | 欧文凯利自控阀（上海）有限公司 | High-performance regulating valve with field bus control and intelligence integration function |
| CN110673575A (en) * | 2019-09-10 | 2020-01-10 | 神华四川能源有限公司江油发电厂 | Power failure protection method for electric actuating mechanism and terminal equipment |
-
2006
- 2006-04-25 CN CN 200620033984 patent/CN2890543Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101799671A (en) * | 2010-03-17 | 2010-08-11 | 德阳瑞能电力科技有限公司 | Regulation and control device of industrial turbine |
| CN103836212A (en) * | 2014-03-18 | 2014-06-04 | 欧文凯利自控阀（上海）有限公司 | High-performance regulating valve with field bus control and intelligence integration function |
| CN110673575A (en) * | 2019-09-10 | 2020-01-10 | 神华四川能源有限公司江油发电厂 | Power failure protection method for electric actuating mechanism and terminal equipment |
| CN110673575B (en) * | 2019-09-10 | 2020-08-11 | 神华四川能源有限公司江油发电厂 | Power failure protection method for electric actuating mechanism and terminal equipment |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: YISITE SCIENCE CO., LTD., DEYANG CITY Free format text: FORMER NAME OR ADDRESS: DEYANG EASTBOURNE TECHNOLOGY CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: The northern section of the Changbai Tianyuan Development Zone, Sichuan Province Road Deyang City Jingyang district (East Technology Co., Ltd), zip code: 618000 Patentee after: Deyang East Technology Co., Ltd. Address before: The northern section of the Changbai Tianyuan Development Zone, Sichuan Province Road Deyang City Jingyang district (East Technology Co., Ltd), zip code: 618000 Patentee before: Deyang Eastern Technology Co., Ltd. |
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| CU03 | Correction of utility model patent gazette |
Correction item: Patentee Correct: Deyang Yishite Technology Co., Ltd. False: Deyang East Technology Co., Ltd. Number: 23 Page: 753 Volume: 24 |
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| ERR | Gazette correction |
Free format text: CORRECT: PATENTEE; FROM: YISITE SCIENCE CO., LTD., DEYANG CITY TO: DEYANG CITY EAST TECHNOLOGY CO.,LTD. |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070418 Termination date: 20130425 |