CN102400900A - Automatic synchronizer control device based on distributed control system - Google Patents
Automatic synchronizer control device based on distributed control system Download PDFInfo
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- CN102400900A CN102400900A CN201110298838XA CN201110298838A CN102400900A CN 102400900 A CN102400900 A CN 102400900A CN 201110298838X A CN201110298838X A CN 201110298838XA CN 201110298838 A CN201110298838 A CN 201110298838A CN 102400900 A CN102400900 A CN 102400900A
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Abstract
The invention relates to an automatic synchronizer control device based on a distributed control system. When load of a speed regulating motor is increased and reduced, one end of a working coil is connected with a firing line of an alternating current power supply through a fourth or first relay, and the other end of the working coil is directly connected with a zero line of the power supply. One end of a control coil is connected with the firing line through a second relay and the first relay, and the other end of the control coil is connected with the zero line of the power supply through a third relay so as to reduce load; or one end of the control coil is connected with the zero line of the power supply through a sixth relay and the other end of the control coil is connected with the firing line of the power supply through a fifth relay and the fourth relay so as to increase load. Therefore, the working coil is only electrified in the processes of increasing and reducing load; moreover, when the load of the control coil is increased and reduced, the firing line and the zero line can be switched, the automatic control over a synchronizer speed regulating motor is realized, the device is effective and reliable, the safety of a steam feed pump is improved, and cost of operation workers is greatly reduced.
Description
Technical field
The present invention relates to a kind of synchronizer automatic controller, particularly a kind of synchronizer automatic controller based on Distributed Control System.
Background technique
At present, lack automatic mean of calculating for the steam feed pump synchronizer, steam feed pump can't realize far controlling system, and the rotating speed control of synchronizer must be carried out on the spot, and this not only can influence adjusting efficient greatly, and generation also possibly cause the accident.
For example, in accident, the person on duty finds that steam-operating drops to 2940 rev/mins by 3021 rev/mins for revolution speed in the pump dise; Feed pressure is followed decline (rotating speed minimum about 2700); When bearing oil pressure rocked 0.11～0.13MPa, notice is outer grasped site inspection, found that this steam-operating is big to the pump vibration; Automatically main inlet throttle-stop valve has turned down 1/3 of former aperture, with regard to earth pulse oil pressure 0.33MPa; Give pump starting other, stop this steam-operating and give in the process of pump, find that again the small turbine high pressure shaft seal is rubescent, promptly clap car immediately, this steam-operating is threaded off to pump, in 3 seconds of coasting operation, closes steam-operating simultaneously and gives pump and steam turbine.Maintenance is opened the clutch protective housing immediately and is carried out jiggering, and turbine rotor has coiled motionless.Find after disintegrating that damage in various degree all takes place for small turbine bearing, cylinder, vapour rotor.Through analyzing reason, find that the admission flow of steam feed pump described in the above-mentioned accident transfinites (the rules regulation is 30.5T/H to the maximum, and the table meter shows 35T/H during actual motion), it is too fast to cause load to gather way; And it is long again to find to reduce duration of load application when flow transfinites, and is to cause one of principal element that current accident takes place.
Not having automatic mean of calculating, mainly is that this motor has two groups of coils, actuating coil Q1 and control coil Q2 because the control motor that said steam feed pump synchronizer is joined is to exchange single-phase asynchronous motor; Actuating coil Q1 is charged during the plus-minus load; And control coil Q2 will add different power supplys when upward plus-minus is loaded, and the live wire of ac power supply and zero line will frequently switch, and motor did not change when actuating coil Q1 switched on separately; Long-time energising can burn out again, and control is got up and bothered very much.To this,, can't directly realize the control function of this AC motor to the old DCS control system (Distributed Control System) of Heat & Control Pty Ltd. of Hollysys that the pump deaerating type of cycles is adopted; Increase control system and fastener, in existing rack, can't carry out again; If make DC MOTOR CONTROL into, be difficult to find the motor of coupling, and motor retrofit can't be joined shaft joint because the site space problem, and main be on-the-spot no DC electrical source, therefore be difficult to the automatic control of realization synchronizer motor.
Summary of the invention
The purpose of this invention is to provide a kind of synchronizer automatic controller based on Distributed Control System; Utilize DCS (Distributed Control System) output flexible characteristic; DCS control system and conventional motors control principle are combined; Through flexible wiring, realize the automatic adjusting of ac adjustable speed motor in the synchronizer.
In order to achieve the above object; Technological scheme of the present invention provides a kind of synchronizer automatic controller based on Distributed Control System; It is provided with first relay to the, six relays, with the corresponding connection of speed-adjustable motor in the steam feed pump synchronizer, and the command signal of the increasing and decreasing load that provides according to Distributed Control System; To applying of ac power supply on the actuating coil of said speed-adjustable motor, and the switching of live wire and zero line is controlled on the control coil;
When the operation of lotus that speed-adjustable motor is lightened the burden, make the port of said actuating coil first end, through first relay of closure, be connected with the live wire of ac power supply; The port of said actuating coil second end is connected with the zero line of ac power supply;
At this moment, the port of said control coil first end, second relay through closure is connected with power firestreak with first relay; The port of said control coil second end, the 3rd relay through closure is connected with zero-power line, realizes the Reduction of Students' Study Load lotus;
When speed-adjustable motor is increased the operation of load, make the port of said actuating coil first end, through the 4th relay of closure, be connected with the live wire of ac power supply; The port of said actuating coil second end is connected with zero-power line;
At this moment, the port of said control coil first end, the 6th relay through closure is connected with zero-power line; The port of said control coil second end, the 5th relay through closure is connected with power firestreak with the 4th relay, realizes increasing load.
Said Distributed Control System provides three sub signals as the instruction of one group of Reduction of Students' Study Load lotus; Three sub signals that said Reduction of Students' Study Load lotus is instructed start simultaneously or close, and the closed simultaneously or disconnection of said first, second, third relay of corresponding control.
Said Distributed Control System also provides three sub signals to increase the load instruction as one group; Said three sub signals that increase load instruction start simultaneously or close, and said the 4th, the 5th, the 6th relay of corresponding control is closed simultaneously or break off.
The startup of three sub signals of said Reduction of Students' Study Load lotus instruction or close is controlled by the Reduction of Students' Study Load lotus button of said Distributed Control System setting.
The startup of said three sub signals that increase load instruction or close is controlled by the load button that increases of said Distributed Control System setting.
The instruction of said Reduction of Students' Study Load lotus is instructed locking each other with the said load that increases.
Instruction of said Reduction of Students' Study Load lotus and the said some signals that increase the load instruction are that subsequent use relay switching variable output module provides in the original Distributed Control System of pump deaerating type of cycles by giving.
Actuating coil and control coil described in the synchronizer speed-adjustable motor, it is in the on-the-spot junction box who is provided with of steam feed pump, to carry out separately through corresponding some relays and the wiring that the live wire and the zero line of ac power supply are connected.
Compared with prior art, the synchronizer automatic controller based on Distributed Control System according to the invention, its advantage is: the present invention has utilized to give in the pump deaerating type of cycles and has carried subsequent use relay switching variable output module in the existing DCS control system; After using the increasing and decreasing load button to send the corresponding instruction signal, can make the actuating coil of said synchronizer speed-adjustable motor, only charged in the operating process of increasing and decreasing load; And, make said control coil when increasing and decreasing load, live wire and zero line are realized switching, thereby have realized the automatic control of synchronizer speed-adjustable motor, and device is effectively reliable, has improved the Security of steam feed pump work, has also saved the artificial cost of operation greatly.
Description of drawings
Fig. 1 is the elementary diagram that the present invention is based on the synchronizer automatic controller of Distributed Control System.
Embodiment
Below in conjunction with description of drawings embodiment of the present invention.
Give in the steam feed pump synchronizer of pump deaerating type of cycles, the speed-adjustable motor of being joined is to exchange single-phase asynchronous motor; Synchronizer automatic controller based on Distributed Control System according to the invention is gone up ac power supply to the actuating coil Q1 of this synchronizer motor and is applied, and control coil Q2 goes up Live line Zero line switching etc. and controls automatically.
When realizing speed-regulating function, in the said synchronizer automatic controller, be provided with Reduction of Students' Study Load lotus button and increase load button correspondence and send control command; Wherein, said Reduction of Students' Study Load lotus pushbutton enable can send three sub signals: CHDOBY16, CHDOBY17, CHDOBY18, in the button attribute, sets this three sub signal as one group of Reduction of Students' Study Load lotus instruction conducting simultaneously; The said load pushbutton enable that increases can send three sub signals: CHDOBY19, CHDOBY20, CHDOBY21, sets this three sub signal and increases load instruction conducting simultaneously as one group.Locking each other between two groups of signals of said increasing and decreasing load instruction that is to say, said three sub signals and said three sub signals of lightening the burden the lotus instruction that increase the load instruction will can not start simultaneously.
Utilize the said duplicate relay output module that carries in the existing DCS control system (Distributed Control System) in the pump deaerating type of cycles of giving to realize.When for example using the DCS control system of Heat & Control Pty Ltd. of Hollysys, can directly use wherein ten six road relay switching variable output modules of FM171 model, export six sub signals of above-mentioned two groups of increasing and decreasing loads instruction.Above-mentioned signal after output by schematic diagram wiring that Fig. 1 designed.
As shown in Figure 1, installed first, second, third relay in the synchronizer automatic controller according to the invention, receive three sub signal CHDOBY16, the CHDOBY17 of said one group of Reduction of Students' Study Load lotus instruction, the control of CHDOBY18 respectively; Also be provided with the 4th, the 5th, the 6th relay, receive the control of said one group of three sub signal CHDOBY19 that increase load instruction, CHDOBY20, CHDOBY21 respectively.
In the process of Reduction of Students' Study Load lotus operation, control said three sub signal CHDOBY16, CHDOBY17, CHDOBY18 conducting simultaneously, make first, second, third relay closes.At this moment, the port A63 of actuating coil Q1 one end of synchronizer speed-adjustable motor is connected with the live wire 220V (A) of 220V ac power supply via first relay, the circuit breaker Q F of closure; The port N61 of the actuating coil Q1 the other end is connected with zero-power line 220V (N) through circuit breaker Q F.The port A65 of control coil Q2 one end of synchronizer speed-adjustable motor via second relay of closure and first relay, circuit breaker Q F, is connected with the live wire 220V (A) of 220V ac power supply; The port A67 of the control coil Q2 the other end via the 3rd relay, the circuit breaker Q F of closure, is connected with zero-power line 220V (N).
In increasing the process of load operation, control said three sub signal CHDOBY19, CHDOBY20, CHDOBY21 conducting simultaneously, make the 4th, the 5th, the 6th relay closes.At this moment, the port A63 of the actuating coil Q1 of synchronizer speed-adjustable motor is connected with the live wire 220V (A) of 220V ac power supply via the 4th relay of closure; The port N61 of actuating coil Q1 is connected with zero-power line 220V (N).The port A65 of control coil Q2 is connected with zero-power line 220V (N) via the 6th relay of closure; The port A67 of control coil Q2 via the 5th relay and the 4th relay of closure, is connected with the live wire 220V (A) of 220V ac power supply.
That is to say, in speed regulation process, do not need actuating coil Q1 to switch on for a long time; Only when increasing the operation of load or Reduction of Students' Study Load lotus; Just Control work coil Q1 is charged, makes its port A63 meet power firestreak 220V (A), and port N61 meets zero-power line 220V (N).When the port A65 of control coil Q2 meets power firestreak 220V (A), when port A67 meets zero-power line 220V (N), realize the Reduction of Students' Study Load lotus; When the port A67 of control coil Q2 meets power firestreak 220V (A), when port A65 meets zero-power line 220V (N), realize increasing load.And; Owing to set locking each other between two groups of command signals of increasing and decreasing load; First, second, third relay and the 4th, the 5th, the 6th relay be not adhesive simultaneously just, thereby can avoid ac power supply live wire, zero line to meet and discuss, and prevents quick-fried fuse and jumps the electrical phenomena generation.
Cooperation is referring to the elementary diagram of Fig. 1; For the ease of wiring with search fault later on; The wiring of above-mentioned some relays and ac power supply and synchronizer speed-adjustable motor specifically is in the on-the-spot junction box who is provided with of steam feed pump, to carry out, and the wiring situation is as shown in table 1.
Corresponding with Fig. 1, the port of label I1, I2 in the table 1, directly with power cabinet in power firestreak 220V (A) and corresponding connection of zero-power line 220V (N).
Table 1
The port of label I4 ~ I15; Be corresponding first port and second port that is provided with on first to the 6th relay; Its corresponding totally six sub signals control of accepting said increasing and decreasing load instruction: promptly; First relay has the first port I4 and the second port I5, and it is corresponding accepts said give signal CHDOBY16-1 in the DCS control cabinet of pump deaerating type of cycles ,-2 control; Second relay has the first port I6 and the second port I7, and it is corresponding accepts said give signal CHDOBY17-1 in the DCS control cabinet of pump deaerating type of cycles ,-2 control; The corresponding relation of other ports and control signal can be by that analogy.
In addition, the port of label I5, I7, I8, I9 directly is connected with the actuating coil Q1 of synchronizer speed-adjustable motor or the corresponding port of control coil Q2.The port of label I4, I6, I10 ~ I15, or separately through the port of the said I5 of butt joint, I7, I8 or I9, be connected with said actuating coil Q1 or control coil Q2; Or, be connected with zero-power line 220V (N) with power firestreak 220V (A) separately through said port I1 of butt joint or I2.The port N61 of said actuating coil Q1 also is connected with zero-power line 220V (N) through craft port I2.
In the same delegation of table 1; Plurality of ports shown in the secondary series, through butted line with the 3rd row in same port dock: for example, the second port I5 of first relay; Respectively with the port A63 of actuating coil Q1; The first port I6 of second relay, the second port I11 of the 4th relay, the first port I12 of the 5th relay is corresponding to be connected.The situation of the butt joint of port shown in the table 1, corresponding mutually in Fig. 1, repeat no more here.The port I3 of other settings, I16 ~ I20 are subsequent use.
In sum, synchronizer automatic controller according to the invention has utilized to give in the pump deaerating type of cycles to carry subsequent use relay switching variable output module in the existing DCS control system; After using the increasing and decreasing load button to send the corresponding instruction signal, can make the actuating coil Q1 of said synchronizer speed-adjustable motor, only charged in the operating process of increasing and decreasing load; And, make said control coil Q2 when increasing and decreasing load, live wire and zero line are realized switching, thereby have realized the automatic control of synchronizer speed-adjustable motor, and device is effectively reliable, has improved the Security of steam feed pump work, has also saved the artificial cost of operation greatly.
Although content of the present invention has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited appended claim.
Claims (8)
1. synchronizer automatic controller based on Distributed Control System; It is characterized in that; Be provided with first relay to the, six relays, with the corresponding connection of speed-adjustable motor in the steam feed pump synchronizer, the command signal of the increasing and decreasing load that provides according to Distributed Control System; To applying of ac power supply on the actuating coil (Q1) of said speed-adjustable motor, and the switching of last live wire of control coil (Q2) and zero line is controlled;
When the operation of lotus that speed-adjustable motor is lightened the burden, make the port (A63) of said actuating coil (Q1) first end, first relay through closure is connected with the live wire of ac power supply; The port (N61) of said actuating coil (Q1) second end is connected with zero-power line;
At this moment, the port (A65) of said control coil (Q2) first end, second relay and first relay through closure are connected with power firestreak; The port (A67) of said control coil (Q2) second end, the 3rd relay through closure is connected with zero-power line, realizes the Reduction of Students' Study Load lotus;
When speed-adjustable motor is increased the operation of load, make the port (A63) of said actuating coil (Q1) first end, the 4th relay through closure is connected with the live wire of ac power supply; The port (N61) of said actuating coil (Q1) second end is connected with the zero-power line of ac power supply;
At this moment, the port (A65) of said control coil (Q2) first end, the 6th relay through closure is connected with zero-power line; The port (A67) of said control coil (Q2) second end, the 5th relay and the 4th relay through closure are connected with power firestreak, realize increasing load.
2. according to claim 1 based on the synchronizer automatic controller of Distributed Control System, it is characterized in that said Distributed Control System provides three sub signals (CHDOBY16, CHDOBY17, CHDOBY18) as the instruction of one group of Reduction of Students' Study Load lotus; Three sub signals that said Reduction of Students' Study Load lotus is instructed start simultaneously or close, and the closed simultaneously or disconnection of said first, second, third relay of corresponding control.
3. like the said synchronizer automatic controller of claim 2, it is characterized in that said Distributed Control System provides three sub signals (CHDOBY19, CHDOBY20, CHDOBY21) to increase the load instruction as one group based on Distributed Control System; Said three sub signals that increase load instruction start simultaneously or close, and said the 4th, the 5th, the 6th relay of corresponding control is closed simultaneously or break off.
4. like the said synchronizer automatic controller of claim 3, it is characterized in that the startup of three sub signals of said Reduction of Students' Study Load lotus instruction or close is controlled by the Reduction of Students' Study Load lotus button of said Distributed Control System setting based on Distributed Control System.
5. like the said synchronizer automatic controller of claim 4, it is characterized in that the startup of said three sub signals that increase load instruction or close is controlled by the load button that increases of said Distributed Control System setting based on Distributed Control System.
6. like claim 3 or 5 said synchronizer automatic controllers, it is characterized in that the instruction of said Reduction of Students' Study Load lotus is instructed locking each other with the said load that increases based on Distributed Control System.
7. like the said synchronizer automatic controller of claim 6 based on Distributed Control System; It is characterized in that; Instruction of said Reduction of Students' Study Load lotus and the said some signals that increase the load instruction are that subsequent use relay switching variable output module provides in the original Distributed Control System of pump deaerating type of cycles by giving.
8. like the said synchronizer automatic controller of claim 7 based on Distributed Control System; It is characterized in that; Actuating coil described in the synchronizer speed-adjustable motor (Q1) and control coil (Q2); It is in the on-the-spot junction box who is provided with of steam feed pump, to carry out separately through corresponding some relays and the wiring that the live wire and the zero line of ac power supply are connected.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103147955A (en) * | 2013-03-04 | 2013-06-12 | 章礼道 | Water-feeding pump system driven by high-speed synchronous motor |
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| JPS55131594A (en) * | 1979-03-29 | 1980-10-13 | Nippon Air Brake Co Ltd | Air compressor control mechanism |
| CN2206512Y (en) * | 1994-11-05 | 1995-08-30 | 黄忠益 | Double-power-supply full-automatic switching device |
| CN200968278Y (en) * | 2006-11-17 | 2007-10-31 | 贵阳铝镁设计研究院 | No-shutdown change-over circuit for local and remote controlling |
| CN101572494A (en) * | 2009-06-17 | 2009-11-04 | 雷勋华 | Method for frequency and phase conversion for alternating straight-polarity power supply and reversed-polarity power supply by mechanical way |
| CN202417899U (en) * | 2011-09-28 | 2012-09-05 | 上海高桥捷派克石化工程建设有限公司 | Synchronizer automatic control device based on DCS (Distributed Control System) |
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2011
- 2011-09-28 CN CN201110298838.XA patent/CN102400900B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55131594A (en) * | 1979-03-29 | 1980-10-13 | Nippon Air Brake Co Ltd | Air compressor control mechanism |
| CN2206512Y (en) * | 1994-11-05 | 1995-08-30 | 黄忠益 | Double-power-supply full-automatic switching device |
| CN200968278Y (en) * | 2006-11-17 | 2007-10-31 | 贵阳铝镁设计研究院 | No-shutdown change-over circuit for local and remote controlling |
| CN101572494A (en) * | 2009-06-17 | 2009-11-04 | 雷勋华 | Method for frequency and phase conversion for alternating straight-polarity power supply and reversed-polarity power supply by mechanical way |
| CN202417899U (en) * | 2011-09-28 | 2012-09-05 | 上海高桥捷派克石化工程建设有限公司 | Synchronizer automatic control device based on DCS (Distributed Control System) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103147955A (en) * | 2013-03-04 | 2013-06-12 | 章礼道 | Water-feeding pump system driven by high-speed synchronous motor |
| CN103147955B (en) * | 2013-03-04 | 2015-09-09 | 章礼道 | The feed-water pump of high-speed synchronous motoring |
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| CN102400900B (en) | 2014-07-09 |
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