CN103203276B - A control method and a system for a scraper coal feeder - Google Patents
A control method and a system for a scraper coal feeder Download PDFInfo
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- CN103203276B CN103203276B CN201210010720.7A CN201210010720A CN103203276B CN 103203276 B CN103203276 B CN 103203276B CN 201210010720 A CN201210010720 A CN 201210010720A CN 103203276 B CN103203276 B CN 103203276B
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Abstract
The present invention discloses a control method and a control system for a scraper coal feeder. The method comprises the steps of: a current transformer mounted on a power supply of the motor of the scraper coal feeder switches a power supply current and outputs a secondary current to a current transmitter; the current transmitter outputs a 4-20 mA current signal to a DCS system after receiving the secondary current; and if the current signal received by the DCS system is less than 12 mA, an instruction of automatically starting a vibrator is issued. The method and the system may make a pre-judgment before the coal in the scraper coal feeder is about to be cut off, and issues an order of starting the rapper.
Description
Technical field
The present invention relates to technical field, more particularly to a kind of control method of Scraper and system.
Background technology
Power plant's run coal bin coal dropping port is frequently occluded seriously, and frequently, pulverized coal preparation system efficiency declines the disconnected coal of Scraper, boiler
Temperature control difficulty is big, affects unit output, and steel ball consumption is also very big.When coal dropping port not coal breakage is observed, it is necessary to existing
Field employee beats hopper immediately makes which unobstructed.
And the coal that whether breaks will be prejudged, because feeder does not design external observation hole, then need the lid at feeder two ends
Plate is opened, and the coal dust inside feeder is trickled down on whole more than ten meters of floor, and effect on environment is extremely severe.
Therefore, it is badly in need of a kind of method that can prejudge automatically the coal that whether will break in Scraper, to improve work
Efficiency.
The content of the invention
The present invention provides a kind of control method of Scraper and system, be able to will break in Scraper coal it
Before, judge in advance, send the order for starting vibrator.
The technical scheme is that：
A kind of control method of Scraper, including step：
A, the current transformer on to scraper plate coal electromechanics electromechanical source receive source current, and export secondary electricity
It flow to current transducer；
After B, current transducer receive the secondary current, 4-20mA current signals are exported to DCS system,；
C, DCS system receive current signal less than 12mA when, send the order of automatic vibrator.
Preferably, in step C, when the current signal that DCS system is received for the first time is less than 12mA, time delay
Time period T1 sends the order of automatic vibrator；
Repeat step A, B again in the time period T1, the current signal that DCS system is received in time period T1 are little
When 12mA, the order of automatic vibrator is sent.
Preferably, in step C, when the current signal that DCS system is received for the first time is less than 12mA, delay time
Section T1 sends the order of automatic vibrator；
If the secondary current that DCS system is received in the time period T1 is more than 12mA, startup rapping is not sent
The order of device.
Preferably, time period T1 is 10S.
Preferably, also include, when the current signal that DCS system is received is more than 12mA, delay time section T2 sends stops
The only order of vibrator；
Repeat step A, B again in the time period T2, the current signal that DCS system is received in time period T2 are more than
During 12mA, the order for stopping vibrator being sent.
Preferably, the primary current is 12-14A at nominal conditions, is 8-9A in disconnected coal.
A kind of control system of Scraper, including current transformer, current transducer, DCS system and vibrator；
The current transformer, for receiving the source current of the scraper plate coal electromechanics electromechanical source, and exports secondary current
To current transducer；
The current transducer, for receiving the secondary current that the current transformer sends, and exports 4-20mA
Current signal is to DCS system；
The DCS system, for when the current signal for receiving is less than 12mA, sending the life of automatic vibrator
Order；
The vibrator, for beaing hopper.
Preferably, the DCS system, is additionally operable to, when the current signal for receiving is more than 12mA, send stopping vibrator
Order.
Preferably, also including set of time unit, for arranging the T1 time periods, the T1 time periods are the DCS system
When the current signal for receiving is less than 12mA, time delay sends the time period of automatic vibrator order；
DCS system, for when the current signal for receiving is less than 12mA, delay time section T1 sends automatic rapping
The order of device；When the current signal less than 12mA is received again in the time period T1, send the order of automatic vibrator.
Preferably, the set of time unit, is additionally operable to arrange the T2 time periods, and the T2 time periods are in the DCS systems
When the current signal that system is received is more than 12mA, time delay sends the time period for stopping vibrator order；
DCS system, is additionally operable to when the current signal for receiving is more than 12mA, and delay time section T2 sends stopping vibrator
Order；When the current signal more than 12mA is received again in the time period T2, send the order for stopping vibrator.
The control method and system of the Scraper that the present invention is provided, has the advantage that：
1st, automatic degree is high：The control method and system by DCS (Distributed Control System, it is distributed
Control system) system automatic reception, the 4-20mA current signals that convert from source current of detection, without the need for manual intervention, subtract
Few human users and monitoring；
2nd, judge accurate：Because during normal lower coal, primary current is 12-14A, break coal when primary current be 8-9A, curent change
Unstable and to cause DCS system to judge inaccurate, whether the present invention judges current signal less than 12mA judging to be by DCS system
The no judgement for resolving coal, 12mA standard on data are obtained for inventor's multiple authentication, and criterion is clear and definite, therefore judged result
Error is little；
3rd, delayed startup avoids maloperation：DCS system can be when the current signal less than 12mA be received first time, time delay
Start vibrator, wait secondary reception result；If still receiving the current signal less than 12mA for the second time, startup is shaken
Beat device, reduce error starting, it is to avoid false judgment and bring unnecessary beaing.
Specific embodiment
Do further detailed description with reference to embodiments to technical solution of the present invention, but embodiments of the present invention are not
It is limited to this.
Embodiment 1
A kind of control method of Scraper, including step：
A, the current transformer on to scraper plate coal electromechanics electromechanical source receive source current, and export secondary electricity
It flow to current transducer；
Current transformer be electric current no-load voltage ratio be 20/1, will current intensity reduce retransmit away；Primary current is normal
12-14A be should be under situation, be 8-9A in disconnected coal.
After B, current transducer receive the secondary current, the current signal of 4-20mA is exported to DCS system；
Current transducer receives 0～1A electric currents, output for 4～20mA；
C, the current signal that DCS system is received be less than 12mA when, send the order of automatic vibrator.
Because of the primary current ＜ 10A of equipment operation during disconnected coal, the electric current is exported with current transducer by current transformer
Current signal is then ＜ 12mA.
The Scraper control system corresponding with 1 step of embodiment includes current transformer, current transducer, DCS
System and vibrator；
Current transformer, for receiving the source current of the scraper plate coal electromechanics electromechanical source, and exports secondary current to electricity
Flow transmitter；
Current transducer, for receiving the secondary current that the current transformer sends, and exports 4-20mA electric currents
To DCS system；
DCS system, for when the current signal for receiving is less than 12mA, sending the order of automatic vibrator；
Vibrator, for beaing hopper after receiving DCS system order.
Embodiment 2
A kind of control method of Scraper, including step：
A, the current transformer on to scraper plate coal electromechanics electromechanical source receive source current, and export secondary electricity
It flow to current transducer；
After B, current transducer receive the secondary current, output 4-20mA current signals are to DCS system；
When C, the current signal received in DCS system first time are less than 12mA, delay time section T1 sends automatic
The order of vibrator；
D, repeat step A, B, when the current signal that DCS system is received in the time period T1 is less than 12mA, send automatically
Start the order of vibrator；
E, vibrator start.
Repeat step A, B again in the time period T1, when the current signal that DCS system is received for the second time is less than 12mA,
Send the order of automatic vibrator；If the current signal that DCS system is received for the second time is more than 12mA, does not send and open
The order of dynamic vibrator.
For example, when T1 is 10S, the current signal less than 12mA that DCS system is received for the first time, then time delay 10S
Go out the order of automatic vibrator；Current transformer receives source current, and second output secondary current for the second time simultaneously
To current transducer, second output current signal of current transducer to DCS system, the electric current that DCS system is received for the second time
When signal is less than 12mA, the order of automatic vibrator is sent；The current signal that DCS system is received for the second time is more than 12mA
When, then do not send the order for starting vibrator；That is, the time for having 10S is detected that two times result is both less than again
12mA, just starts vibrator, it is to avoid maloperation.
The Scraper control system corresponding with 2 step of embodiment includes current transformer, current transducer, DCS
System and vibrator；Current transformer, current transducer, the effect of vibrator are with described in embodiment 1.
DCS system, for when the current signal for receiving is less than 12mA, delay time section T1 sends automatic
The order of vibrator, when the current signal that time period T1 is received is less than 12mA, sends the order of automatic vibrator；
Set of time unit, then for arranging T1 time periods, the current signal that the T1 time periods are received for DCS system
During less than 12mA, time delay sends the time period of the order of automatic vibrator.
Repeat step A, B again in the time period T1, DCS system are less than 12mA in the current signal that time period T1 is received
When, send the order of automatic vibrator；If the current signal that DCS system is received for the second time is more than 12mA, do not send out
Go out to start the order of vibrator.
Embodiment 3
A kind of control method of Scraper, including step：
A, the current transformer on to scraper plate coal electromechanics electromechanical source receive source current, and export secondary electricity
It flow to current transducer；
After B, current transducer receive the secondary current, output 4-20mA current signals are to DCS system；
When C, the current signal received in DCS system first time are less than 12mA, delay time section T1 sends automatic
The order of vibrator；
When the current signal that D, DCS system are received in the time period T1 is less than 12mA, automatic vibrator is sent
Order；
E, vibrator start；
F, repeat step A, B, when the current signal that DCS system is received is more than 12mA, delay time section T2 sends stops
The only order of vibrator；
G, repeat step A, B, when the current signal that DCS system is received in the time period T2 is more than 12mA, send stopping
The order of vibrator.
H, vibrator stop.
Similar with 2 step C of embodiment startup vibrator process, the process for stopping vibrator can also be in certain time period
Inside detected twice, when two times result is both greater than 12mA, DCS system just sends the order for stopping vibrator.
The Scraper control system corresponding with 3 step of embodiment includes current transformer, current transducer, DCS
System and vibrator；Current transformer, current transducer, the effect of vibrator are with described in embodiment 1.
DCS system, when the current signal for, after vibrator starts, receiving is more than 12mA, delay time section
T2 sends the order for stopping vibrator, when the current signal that time period T2 is received is more than 12mA, sends and stops vibrator
Order；
Set of time unit, then for arranging T2 time periods, the current signal that the T2 time periods are received for DCS system
During more than 12mA, time delay sends the time period of the order for stopping vibrator.
Above a kind of control method of Scraper provided in an embodiment of the present invention and system are described in detail,
Specific case used herein is set forth to the principle of the present invention and embodiment, is only used for help and is understood core of the present invention
Thought is thought；Should not be construed as limiting the invention.
Claims (10)
1. a kind of control method of Scraper, it is characterised in that including step：
A, the current transformer on the Scraper motor power receive source current, and export secondary current extremely
Current transducer；
After B, current transducer receive the secondary current, output 4-20mA current signals are to DCS system；
C, DCS system receive current signal less than 12mA when, send the order of automatic vibrator.
2. the control method of a kind of Scraper according to claim 1, it is characterised in that in step C,
When the current signal that DCS system is received for the first time is less than 12mA, delay time section T1 sends automatic vibrator
Order；
Repeat step A, B again in the time period T1, the current signal that DCS system is received in time period T1 are less than
During 12mA, the order of automatic vibrator is sent.
3. the control method of a kind of Scraper according to claim 1, it is characterised in that in step C,
When the current signal that DCS system is received for the first time is less than 12mA, delay time section T1 sends the order of automatic vibrator；
If the current signal that DCS system is received in the time period T1 is more than 12mA, the order for starting vibrator is not sent.
4. the control method of a kind of Scraper according to Claims 2 or 3, it is characterised in that the time period, T1 was
10S。
5. the control method of a kind of Scraper according to claim 1, it is characterised in that also include, in DCS system
When the current signal for receiving is more than 12mA, delay time section T2 sends the order for stopping vibrator；
Repeat step A, B again in the time period T2, the current signal that DCS system is received in time period T2 are more than 12mA
When, send the order for stopping vibrator.
6. a kind of control method of the Scraper according to any one of claims 1 to 3, it is characterised in that the electricity
Ource electric current is 12-14A at nominal conditions, is 8-9A in disconnected coal.
7. a kind of control system of Scraper, it is characterised in that including current transformer, current transducer, DCS system and
Vibrator；
The current transformer, for receiving the source current of the Scraper motor power, and exports secondary current extremely
Current transducer；
The current transducer, for receiving the secondary current that the current transformer sends, and exports 4-20mA electric currents
Signal is to DCS system；
The DCS system, for when the current signal for receiving is less than 12mA, sending the order of automatic vibrator；
The vibrator, for beaing hopper.
8. a kind of control system of Scraper according to claim 7, it is characterised in that the DCS system, also uses
In when the current signal for receiving is more than 12mA, the order for stopping vibrator being sent.
9. the control system of a kind of Scraper according to claim 7, it is characterised in that also including set of time list
Unit, for arranging the T1 time periods, when the T1 time periods are that the current signal that the DCS system is received is less than 12mA, time delay
Send the time period of automatic vibrator order；
DCS system, for when the current signal for receiving is less than 12mA, delay time section T1 sends automatic vibrator
Order；When the current signal less than 12mA is received again in the time period T1, send the order of automatic vibrator.
10. a kind of control system of Scraper according to claim 9, it is characterised in that the set of time list
Unit, be additionally operable to arrange the T2 time periods, the T2 time periods be the current signal that the DCS system is received be more than 12mA when,
Time delay sends the time period for stopping vibrator order；
DCS system, is additionally operable to when the current signal for receiving is more than 12mA, and delay time section T2 sends the life for stopping vibrator
Order；When the current signal more than 12mA is received again in the time period T2, send the order for stopping vibrator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210010720.7A CN103203276B (en) | 2012-01-15 | 2012-01-15 | A control method and a system for a scraper coal feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210010720.7A CN103203276B (en) | 2012-01-15 | 2012-01-15 | A control method and a system for a scraper coal feeder |
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| Publication Number | Publication Date |
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| CN103203276A CN103203276A (en) | 2013-07-17 |
| CN103203276B true CN103203276B (en) | 2017-03-22 |
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| CN201210010720.7A Active CN103203276B (en) | 2012-01-15 | 2012-01-15 | A control method and a system for a scraper coal feeder |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624355B (en) * | 2015-01-09 | 2017-02-22 | 山西太钢不锈钢股份有限公司 | Raw ore storage yard blanking control method |
| CN104971820B (en) * | 2015-07-17 | 2017-12-12 | 江苏大唐国际吕四港发电有限责任公司 | A kind of pulverized coal preparation system and its control method using vibrator |
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|---|---|---|---|---|
| EP0636417A2 (en) * | 1993-07-26 | 1995-02-01 | Mitsubishi Jukogyo Kabushiki Kaisha | Coal pulverizer associated with a rotary classifier and method for operating the same |
| CN201008803Y (en) * | 2006-12-15 | 2008-01-23 | 吴爱营 | Automatic feeding controller of rock material crusher |
| CN101912807A (en) * | 2010-08-20 | 2010-12-15 | 纪文刚 | Method and controller for automatically controlling feed of crusher |
| CN102008995A (en) * | 2009-09-04 | 2011-04-13 | 鞍钢集团矿业公司 | Load automatic controller of coal mill of boiler |
| CN201827901U (en) * | 2010-10-20 | 2011-05-11 | 广东理文造纸有限公司 | Coal feeding system capable of judging coal blockage and coal interruption |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09239287A (en) * | 1996-03-08 | 1997-09-16 | Mitsubishi Heavy Ind Ltd | Method for control of number of revolution of rotary separator attached to coal crushing mill and device therefor |
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2012
- 2012-01-15 CN CN201210010720.7A patent/CN103203276B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0636417A2 (en) * | 1993-07-26 | 1995-02-01 | Mitsubishi Jukogyo Kabushiki Kaisha | Coal pulverizer associated with a rotary classifier and method for operating the same |
| CN201008803Y (en) * | 2006-12-15 | 2008-01-23 | 吴爱营 | Automatic feeding controller of rock material crusher |
| CN102008995A (en) * | 2009-09-04 | 2011-04-13 | 鞍钢集团矿业公司 | Load automatic controller of coal mill of boiler |
| CN101912807A (en) * | 2010-08-20 | 2010-12-15 | 纪文刚 | Method and controller for automatically controlling feed of crusher |
| CN201827901U (en) * | 2010-10-20 | 2011-05-11 | 广东理文造纸有限公司 | Coal feeding system capable of judging coal blockage and coal interruption |
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| CN103203276A (en) | 2013-07-17 |
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Address after: Sheng Tong Industrial Park No. 109 Venus Road 410200 in Hunan province Changsha District of Wangcheng City Applicant after: Suntown Technology Group Corporation Address before: Sheng Tong Industrial Park No. 109 Venus Road 410200 in Hunan province Changsha District of Wangcheng City Applicant before: Hunan Shengtong Technology Group Co., Ltd. |
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