CN202717787U - Blast furnace gage rod control device - Google Patents
Blast furnace gage rod control device Download PDFInfo
- Publication number
- CN202717787U CN202717787U CN 201220237482 CN201220237482U CN202717787U CN 202717787 U CN202717787 U CN 202717787U CN 201220237482 CN201220237482 CN 201220237482 CN 201220237482 U CN201220237482 U CN 201220237482U CN 202717787 U CN202717787 U CN 202717787U
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- Prior art keywords
- stock rod
- controller
- gage rod
- motor
- blast furnace
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Abstract
The utility model provides a blast furnace gage rod control device, which comprises a gage rod heavy punch, a gage rod chain, a gage rod rolling tube, a speed reducer, a shaft coupler, a brake, a variable frequency motor, an absolute value encoder, an incremental encoder, a controller and a vector frequency converter, wherein a bearing of the variable frequency motor is mechanically connected with the speed reducer through the shaft coupler and the brake, the speed reducer is coaxially connected with the gage rod rolling tube, the gage rod rolling tube is connected with the gage rod heavy punch through the gage rod chain, the variable frequency motor is connected with the frequency converter through a motive power variable frequency cable, the incremental encoder and the variable frequency motor are coaxially connected to be used for measuring the rotating speed of the motor, the incremental encoder is connected with the vector frequency converter through a hardwire, the absolute value encoder is coaxially connected with the speed reducer and is connected with the controller through a bus or a hardwire, and the controller is connected with the vector frequency converter through a hardwire or a bus. The blast furnace gage rod control device has the advantages that high speed and stability in the rod release process can be realized, the charge level catching is accurate, and the high speed, the stability and the safety of the gage rod control are ensured.
Description
Technical field
The utility model belongs to blast furnace roof system control field, particularly controller of blast furnace detector.
Background technology
Stock rod is the charge level that detects high furnace interior ore and coke, understands charge level situation and the key equipment of judging the working of a furnace in the stove for the smelting operation personnel, and the reliability service of stock rod is the prerequisite guarantee of blast furnace trouble-free operation.When the stock rod stockline drops to the setting stockline, the stock rod automatic lifting is to standby position, ore or coke are distributed in the stove according to the distributing mode of technique initialization, treat that cloth is complete, stock rod begins to transfer the detection charge level from standby position, and the stock rod weight begins to follow charge level after visiting charge level, after receiving that cloth instruction and stockline drop to the setting stockline, stock rod is carried to standby position, so circulation.Above-mentioned course of action based on stock rod, control to stock rod proposes very strict requirement: the chi process of putting of stock rod must be steady, stock rod is being surveyed and is being followed in the charge level process, chi can not occur down and bury the chi phenomenon, otherwise, gently then affect the stockline data, heavy then weight is burnt or chain blows, cause stock rod can't normally visit material.
At present, the control mode of stock rod is divided into following three classes according to electric control system:
(1) the stock rod control mode of simple mechanical hatching gate formula: traditional blast furnace probing rod is depended merely on lifting and the decline that motor and band-type brake are controlled weight, and band-type brake is opened when carrying chi, simultaneously the motor forward; Band-type brake is opened when putting chi, and weight relies on gravity to do free decline, relies on speed relay or encoder to judge the weight lowering speed, closes band-type brake when speed is excessive, and then opens band-type brake and make weight continue to descend.This kind control mode is simple in structure, but too frequent fragile, weight hypervelocity, the weight problems such as charge level, weight easily come off of easily nuzzling that descend easily of its band-type brake action become the persistent ailment that affect blast furnace production.
(2) the stock rod control mode of direct-current machine driving: the DC motor speed-regulating stability of characteristics, torque characteristics is good, and debugging is convenient, can well finish the control to stock rod, but direct-current machine is expensive, and maintenance is large, has affected applying of this control mode.
(3) the stock rod control mode of AC frequency conversion vector: along with the maturation of AC frequency conversion vector control technology is used, large blast furnace both domestic and external adopts the AC asynchronous motor transmission mostly, the control mode take vector frequency converter as key control unit.Carry the method for control speed that the chi process has all adopted to be had the speed feedback or feed back without speed, the control method of putting the chi process has two kinds: Velocity control and torque control method, Velocity control take current of electric as zone bit easily produces erroneous judgement at stock rod seizure charge level and breaks, had influence on the control effect of stock rod, and torque control method is put at stock rod and is had inborn deficiency aspect the stationarity of chi, easily causes stock rod driving fault.
The utility model content
Technical problem to be solved in the utility model is: a kind of controller of blast furnace detector is provided, the quick and stable of chi process is put in realization, catches charge level accurate, follows charge level real-time, can tackle the material lubricating substance that collapses and sit the unusual working of a furnaces such as material, guarantee rapidity, stability and security that stock rod is controlled.
The utility model is to solve the problems of the technologies described above the technical scheme of taking to be: a kind of controller of blast furnace detector is characterized in that: it comprises stock rod weight, stock rod chain, stock rod cylinder, step-down gear, shaft coupling and stopper, variable-frequency motor, absolute value encoder, incremental encoder, controller and vector frequency converter;
Wherein the bearing of variable-frequency motor is through shaft coupling and stopper and step-down gear mechanical connection, and step-down gear is connected with the stock rod cylinder is coaxial, and the stock rod cylinder connects the stock rod weight by the stock rod chain;
Variable-frequency motor is connected by the power frequency-changing cable with frequency transformer;
Incremental encoder is used for measuring motor speed with coaxial connection of variable-frequency motor, and incremental encoder is connected the closed-loop control that is used for realizing motor speed with vector frequency converter by hard wired mode;
Absolute value encoder is connected with step-down gear is coaxial, and absolute value encoder also is connected with controller by bus or hardwire, and controller is connected with vector frequency converter by hardwire or bus.
Press such scheme, described controller is the PLC controller.
The beneficial effects of the utility model are:
1, adopts the mode of speed closed loop control to realize at the uniform velocity putting chi, guarantee the steady of stock rod;
2, controller obtains the parameter such as torque current, output frequency of vector frequency converter in real time, can issue forward, counter-rotating instruction, the instruction of switch speed torque mode to vector frequency converter in real time, the set-point of writing speed and moment, finish controller and vector frequency converter to the control of stock rod weight, adopt motor torque current break method accurately to catch charge level;
3, in conjunction with the weight of charge level depth and chain, adopt the mode of the torque-variable control of the anti-down vertical moment of real time modifying and float meter torque setting value to finish the anti-down vertical control of stock rod and follow charge level control, guarantee that stock rod does not fall to hang down, follows in real time charge level;
4, follow in the charge level process at stock rod, judge that by the lowering speed of real-time judge charge level the blast furnace material lubricating substance that whether collapses sits unusual condition such as material grade, when instantly falling excessive velocities, the chi pattern of at the uniform velocity putting of in time stock rod being controlled from the Torque Control pattern switching meeting speed closed loop of following charge level, so that stock rod continues steadily to put chi, catch and follow charge level, allow stock rod can tackle Blast Furnace Abnormal Conditions Judgement, prevent that probe from being buried.
Description of drawings
Fig. 1 is the structure iron of the utility model one embodiment.
Fig. 2 is the control flow chart of the utility model one embodiment.
Among the figure, 1: the stock rod weight; 2: the stock rod chain; 3: the stock rod cylinder; 4: step-down gear; 5: shaft coupling and stopper; 6: variable-frequency motor; 7: absolute value encoder; 8: incremental encoder; The 9:PLC controller; 10: vector frequency converter.
Embodiment
Below in conjunction with accompanying drawing 1, accompanying drawing 2, specifically describe by the specific embodiment formula, but do not do the foundation of any restriction as the utility model.
Fig. 1 is the structure iron of the utility model one embodiment, comprises stock rod weight 1, stock rod chain 2, stock rod cylinder 3, step-down gear 4, shaft coupling and stopper 5, variable-frequency motor 6, absolute value encoder 7, incremental encoder 8, PLC controller 9 and vector frequency converter 10.The bearing of variable-frequency motor 6 links to each other with step-down gear 4 machineries with stopper 5 through shaft coupling, step-down gear 4 and 3 coaxial connections of stock rod cylinder, and stock rod cylinder 3 connects stock rod weight 1 by stock rod chain 2, and variable-frequency motor 6 is connected by the power frequency-changing cable with frequency transformer; Incremental encoder 8 and 6 coaxial connections of variable-frequency motor, in order to measure motor speed, incremental encoder 8 is connected to vector frequency converter 10 by hard wired mode, to realize the closed-loop control of motor speed; Absolute value encoder 7 and 4 coaxial connections of step-down gear, absolute value encoder 7 is connected to PLC controller 9 by bus or hardwire, and PLC controller 9 reads the data of absolute value encoder 7, calculates the actual grade of stock rod weight 1; The PLC controller is connected to vector frequency converter 8 by hardwire or bus, can obtain in real time the parameter such as torque current, output frequency of vector frequency converter 10, can issue forward, counter-rotating instruction, the instruction of switch speed torque mode to vector frequency converter in real time, the set-point of writing speed and moment is finished the control of PLC controller 9 and 10 pairs of stock rod weights 1 of vector frequency converter.
A kind of blast furnace probing rod control method, as shown in Figure 2, it may further comprise the steps:
S1) speed control mode: stock rod is put the chi condition when satisfying, and frequency transformer switches to speed control mode, adopts the mode of speed closed loop to control and at the uniform velocity puts chi, and putting the chi Speed Setting is V
Set1(getting about 0.3m/s); When putting chi, open brake sends and puts the chi order, and motor drives stock rod with speed V through step-down gear and cylinder
Set1At the uniform velocity transfer;
S2) whether the torque current of real-time judge motor undergos mutation, if the motor torque electric current is undergone mutation reduces, and frequency transformer switches to the torque master mode; Otherwise adopt speed control mode always;
S3) torque master mode:
3.1 compensate according to the weight of charge level depth to the stock rod chain, calculate in real time torque setting value T
Set1And T
Set2, T wherein
Set1Be anti-down vertical moment, T
Set2Be float meter moment; T
Set1The weight chain of weight weight+transfer, the weight chain＜T that transfers
Set2The weight chain of＜weight weight+transfer;
3.2 after entering the torque master mode, at first the moment set-point is set as T
Set1, be t action time
1(getting 1 second) is used for stretching weight and chain, subsequently the moment set-point is set as T
Set2, stock rod begins to follow charge level;
3.3 at float meter moment T
Set2Effect under, stock rod descends with charge level, the record charge level depth calculates the lowering speed of charge level;
3.4 whether the lowering speed of real-time judge charge level exceeds the speed limit (speed surpasses 0.5m/s), if hypervelocity is then got back to S1);
S4) read in real time the value of absolute value encoder and be converted into the stock rod depth information by PLC, whether the real-time judge stock rod arrives is set stockline and receives the cloth instruction, if then stop to put chi, prepares to carry chi;
S5) whether the real-time judge stock rod degree of depth reaches smallest limit (4m), if then stop to put chi, prepares to carry chi.
A kind of blast furnace probing rod Controlling System comprises:
Rate control module is used for putting the chi condition when satisfying at stock rod, and frequency transformer switches to speed control mode, adopts the mode of speed closed loop to control and at the uniform velocity puts chi;
Master mode is selected module, and whether the torque current that is used for the real-time judge motor undergos mutation, if the motor torque electric current is undergone mutation reduces, and chooses the torque control module; Otherwise adopt rate control module always;
The torque control module comprises Calculating Torque during Rotary module, torque setting module, charge level lowering speed computing module and hypervelocity judge module; Wherein the Calculating Torque during Rotary module is used for compensating according to the weight of charge level depth to the stock rod chain, calculates in real time torque setting value T
Set1And T
Set2, T wherein
Set1Be anti-down vertical moment, T
Set2Be float meter moment; The torque setting module is used at first the moment set-point being set as T after entering the torque master mode
Set1, be t action time
1Be used for stretching weight and chain, subsequently the moment set-point be set as T
Set2, stock rod begins to follow charge level; Charge level lowering speed computing module is used at float meter moment T
Set2Effect under, stock rod descends with charge level, the record charge level depth calculates the lowering speed of charge level; Whether the lowering speed that the hypervelocity judge module is used for the real-time judge charge level exceeds the speed limit, if hypervelocity is then selected rate control module;
Set the stockline judge module, be used for the real-time judge stock rod and whether arrive the setting stockline and receive the cloth instruction, if then stop to put chi, prepare to carry chi;
The smallest limit judge module is used for the real-time judge stock rod degree of depth and whether reaches smallest limit, if then stop to put chi, prepares to carry chi.
To sum up, stock rod control method and the system that the utility model proposes realize that stock rod puts the stationarity of chi process, catch the accuracy of charge level, follow the charge level real-time, tackles the material lubricating substance that collapses and sitting and the unusually working of a furnace such as expect, can finely satisfy blast furnace and normally produce.
Claims (2)
1. controller of blast furnace detector, it is characterized in that: it comprises stock rod weight, stock rod chain, stock rod cylinder, step-down gear, shaft coupling and stopper, variable-frequency motor, absolute value encoder, incremental encoder, controller and vector frequency converter;
Wherein the bearing of variable-frequency motor is through shaft coupling and stopper and step-down gear mechanical connection, and step-down gear is connected with the stock rod cylinder is coaxial, and the stock rod cylinder connects the stock rod weight by the stock rod chain;
Variable-frequency motor is connected by the power frequency-changing cable with frequency transformer;
Incremental encoder is used for measuring motor speed with coaxial connection of variable-frequency motor, and incremental encoder is connected the closed-loop control that is used for realizing motor speed with vector frequency converter by hard wired mode;
Absolute value encoder is connected with step-down gear is coaxial, and absolute value encoder also is connected with controller by bus or hardwire, and controller is connected with vector frequency converter by hardwire or bus.
2. controller of blast furnace detector according to claim 1, it is characterized in that: described controller is the PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220237482 CN202717787U (en) | 2012-05-25 | 2012-05-25 | Blast furnace gage rod control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220237482 CN202717787U (en) | 2012-05-25 | 2012-05-25 | Blast furnace gage rod control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202717787U true CN202717787U (en) | 2013-02-06 |
Family
ID=47619615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220237482 Expired - Fee Related CN202717787U (en) | 2012-05-25 | 2012-05-25 | Blast furnace gage rod control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202717787U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391509A (en) * | 2014-10-31 | 2015-03-04 | 莱芜钢铁集团有限公司 | Control method and apparatus of blast furnace sounding rod |
| CN105525053A (en) * | 2015-12-19 | 2016-04-27 | 安徽马钢自动化信息技术有限公司 | Control device and method of stock rod |
-
2012
- 2012-05-25 CN CN 201220237482 patent/CN202717787U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391509A (en) * | 2014-10-31 | 2015-03-04 | 莱芜钢铁集团有限公司 | Control method and apparatus of blast furnace sounding rod |
| CN104391509B (en) * | 2014-10-31 | 2017-06-06 | 莱芜钢铁集团有限公司 | The control method and device of blast furnace probing rod |
| CN105525053A (en) * | 2015-12-19 | 2016-04-27 | 安徽马钢自动化信息技术有限公司 | Control device and method of stock rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130206 Termination date: 20140525 |