CN102703633A - Furnace top stock-level detection system for blast furnace - Google Patents
Furnace top stock-level detection system for blast furnace Download PDFInfo
- Publication number
- CN102703633A CN102703633A CN2012101834463A CN201210183446A CN102703633A CN 102703633 A CN102703633 A CN 102703633A CN 2012101834463 A CN2012101834463 A CN 2012101834463A CN 201210183446 A CN201210183446 A CN 201210183446A CN 102703633 A CN102703633 A CN 102703633A
- Authority
- CN
- China
- Prior art keywords
- stock
- rod
- height
- absolute value
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims description 20
- 239000000523 sample Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Images
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention discloses a furnace top stock-level detection system for a blast furnace, which includes an absolute value coder data acquisition module, a chain wheel complete rotation round record module, a scale factor K computation module, a stock rod height calculation module and a stock height output module. When a stock rod designed range stockline and a 0 meter stockline of the master controller are determined, the absolute value coder data acquisition module respectively records readings on absolute value coders at that time, and the chain wheel complete rotation round record module records the complete rotation round number of a chain wheel during the descending process of a counter weight; then the scale factor is calculated; and finally, the actual height values of the stock rod can be calculated and output in real time in every period. The system disclosed by the invention solves the problems that the present blast furnace stock rod system is complicated and time-consuming in the zero calibration process and further affects the production.
Description
Technical Field
The invention relates to a blast furnace top system, in particular to a blast furnace top material level detection system.
Background
The stock rod is an important facility of the blast furnace top and the feeding system, is responsible for detecting the height and the distribution condition of the charge level in the blast furnace in production, is a basis for judging the combustion progress of raw materials in the blast furnace, and provides a basis for automatic charging control, so that the stock rod plays an important role in the efficient and safe operation of the whole blast furnace system. However, the current blast furnace stock rod system has the following problems. (1) Because the reading and the actual height of the absolute value encoder of the stock rod are in a proportional corresponding relation, zero calibration is difficult during debugging, and the calibration process is troublesome, (2) the detection value of the stock rod after a period of operation often produces deviation, and the zero-meter stock line position and the actual zero-meter stock line position of the stock rod are increasingly different. At this time, if the zero point of the measuring rod is not calibrated, the normal production of the blast furnace can be seriously influenced. (3) In the production process of the blast furnace, the chain of the heavy hammer can often fall off and be replaced by a new heavy hammer, the absolute value encoder must be reset after the heavy hammer is replaced, zero calibration is carried out, the process is troublesome, time consumption is high, and normal production is influenced. In view of these problems with the prior art methods, there is a need for targeted improvements to improve the efficiency and quality of blast furnace production.
Disclosure of Invention
The invention aims to provide a blast furnace top material level detection system which can be used for simply and conveniently measuring the blast furnace top material level and solving the problems of complex zero calibration process and time consumption in the debugging process of the conventional blast furnace stock rod.
The technical scheme adopted by the invention is as follows: a blast furnace top level detection system comprising:
(1) the data acquisition module of the absolute value encoder is used for recording the reading a of the absolute value encoder when the heavy hammer is at the demarcation point of the 0m material line position and the material line of the stock rod design range H1And a 2;
(2) a full revolution number recording module of rotation of the sprocket: the number n of the whole rotation circles of the chain wheel in the process that the weight dropper descends from the position of the material line of 0m to the material line of the trial rod design range H is recorded;
(3) a proportionality coefficient K calculating module: reading a for designing range, absolute value encoder according to stock rod1，a2N, the number of complete revolutions of the sprocket, m, the number of bits of the absolute encoder resolution, calculating the proportionality coefficient K
(ⅱ)；
(4) Stock rod height calculation module: used for calculating the actual value of the height of the trial rod, and updating the actual value of the height of the trial rod once every time period
Wherein, the height value of the stock rod in the last time period,
is the reading of the absolute value encoder at the end of the current time period,
the absolute value encoder is used for reading at the beginning of the current time period, the time length of the time period needs to be selected within the time period, and the rotation of the absolute value encoder does not exceed a half cycle;
(5) trial rod height output module: for outputting the measured probe height.
Further, the system further comprises: a zero calibration module: the method is used for lowering the trial rod to be below a 0m stock line and then lifting the trial rod to be above the 0m stock line, and automatically setting the actual height value L of the current trial rod at the moment when the master controller corresponds to the limiting signal from the absence to the presence1Set to 0 m.
The invention has the beneficial effects that: (1) by using the method provided by the invention, the step of zero calibration required in the trial rod debugging process can be eliminated, the debugging step is simplified, and the cost of manpower and material resources is saved. Particularly, after the heavy hammer or the absolute value encoder is replaced, the encoder can be quickly and accurately debugged and calibrated. (2) The detection value of the stock rod is prone to generating deviation after the stock rod runs for a period of time, and the difference between the zero-meter stock line position of the stock rod and the actual zero-meter stock line position is larger and larger. In the past, the work for adjusting the deviation is large, and even the production is influenced. The zero calibration step provided by the invention can be used for automatic calibration, and can be used for calibrating at any time in the production process, so that the accuracy and consistency of all the measuring data of the stock rod are ensured.
Drawings
Fig. 1 is a block diagram of a hardware system composition according to an embodiment of the present invention.
FIG. 2 is a block diagram of a blast furnace top level detection system according to one embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a block diagram of a hardware system according to an embodiment of the present invention, the system includes a PLC controller, a master controller, a frequency converter, a motor, a sprocket, a weight, an incremental encoder, and an absolute encoder, the PLC controller receives signals from the master controller and the absolute encoder; the frequency converter is connected with the PLC controller and the motor, and the incremental encoder is connected with the frequency converter and the motor; the motor is connected with the chain wheel to drive the chain wheel to rotate positively and negatively, and the absolute value encoder is connected with the chain wheel.
In the embodiment, the trial rod is selected as the trial rod with the maximum measuring range of 6m, and the absolute value encoder is a 16-bit single-circle encoder.
The PLC controller receives digital quantity signals of 0m and 6m material line positions transmitted from the on-site master controller and 16-bit analog quantity signals transmitted by the absolute value encoder. Data and on-line calculations are then performed according to the method of the invention, continuously giving the detected level height.
The master controller is a field mechanical contact signal and can transmit digital quantity signals of 0m and 6m stockline positions to the PLC.
The frequency converter is a device for controlling the positive and negative rotation and speed of the motor.
The motor drives the chain wheel to rotate positively and negatively.
The chain wheel controls the lifting and the descending of the heavy hammer through the forward and reverse rotation of the chain wheel.
The incremental encoder feeds back the rotation speed of the motor to the frequency converter, and speed feedback in a closed-loop control system is formed.
The absolute value encoder is used for recording the change information of the rotation angle of the chain wheel, and because the change amount of the angle of the chain wheel is in a direct proportion relation with the change amount of the height of the stock rod, the angle of the chain wheel is converted into a 16-bit analog quantity signal (0-65535) and the 16-bit analog quantity signal is transmitted to the PLC.
Fig. 2 shows a flow chart of a blast furnace top level detection method according to an embodiment of the present invention.
A blast furnace top level detection system comprising:
(1) the data acquisition module of the absolute value encoder is used for recording the reading a of the absolute value encoder when the heavy hammer is at the demarcation point of the 0m material line position and the material line of the stock rod design range H1And a 2;
(2) a full revolution number recording module of rotation of the sprocket: the number n of the whole rotation circles of the chain wheel in the process that the weight dropper descends from the position of the material line of 0m to the material line of the trial rod design range H is recorded; the number of the whole rotation circle of the chain wheel can be manually recorded and recorded;
(3) a proportionality coefficient K calculating module: reading a for designing range, absolute value encoder according to stock rod1，a2N, the number of complete revolutions of the sprocket, m, the number of bits of the absolute encoder resolution, calculating the proportionality coefficient K
(ⅱ)；
(4) Stock rod height calculation module: used for calculating the actual value of the height of the trial rod, and updating the actual value of the height of the trial rod once every time period
In the formula: l is1Is the actual height value of the stock rod, L0The value of the height of the stock rod in the previous scanning period is the difference value of the height of the stock rod in the scanning period.
Andthe encoder readings after and before one scan cycle, respectively, and K is the scaling factor. It should be noted that when we choose the scanning period, we must ensure that the encoder does not rotate more than half a revolution (if more than half a revolution we default to a reverse rotation to this position, since aDifference (D)Can only range between-32768 and 32767). At the same time andmust be the same as the signal data type of the absolute value encoder, is INT type, and is calculated according to the 16-bit binary data rule, so that the a calculated at each initial position can be guaranteed no matter what initial positionDifference (D)Are the actual rotational position difference of the encoder. In the program of the PLC, 100ms can be selected as a scanning period, and the actual value of the height of the stock rod is updated every 100ms, so that the requirement of practical application is met;
(5) trial rod height output module: for outputting the measured probe height;
(6) a zero calibration module: the method is used for lowering the trial rod to be below a 0m stock line and then lifting the trial rod to be above the 0m stock line, and automatically setting the actual height value L of the current trial rod at the moment when the master controller corresponds to the limiting signal from the absence to the presence1Set to 0 m.
When the trial rod is used for the first time and the heavy hammer is replaced or needs to be calibrated, the trial rod is firstly lowered to be below the 0m stockline and then lifted to be above the 0m stockline, and when the master controller corresponds to a moment of the limiting signal, the program can automatically calculate the height L1Set to 0 m. At the moment, the calculation height is consistent with the actual height of the stock rod no matter how the reading of the encoder is, and then the system continues to use the stock rod height calculation module to calculate, so that the subsequent calculation can be ensuredThe calculated height and the actual height are completely consistent.
Through the system, the material level of the furnace top system is detected. If need recalibrate after normal production, change weight or change absolute value encoder, only need use zero calibration module to carry out the calibration can. The time and labor consumption of encoder calibration in the conventional method are completely avoided, and the efficiency and the quality of blast furnace production are improved.
Claims (2)
1. The utility model provides a blast furnace top material level detecting system which characterized in that: the method comprises the following steps:
(1) the data acquisition module of the absolute value encoder is used for recording the reading a of the absolute value encoder when the heavy hammer is at the demarcation point of the 0m material line position and the material line of the stock rod design range H1And a2；
(2) The whole-circle number recording module for the rotation of the chain wheel comprises: the number n of the whole rotation circles of the chain wheel in the process that the weight dropper descends from the position of the material line of 0m to the material line of the trial rod design range H is recorded;
(3) a proportionality coefficient K calculating module: forDesigning the reading a of a range, absolute value encoder according to the stock rod1，a2N, the number of complete revolutions of the sprocket, m, the number of bits of the absolute encoder resolution, calculating the proportionality coefficient K
(ⅱ)；
(4) Stock rod height calculation module: used for calculating the actual value of the height of the trial rod, and updating the actual value of the height of the trial rod once every time period
Wherein,
the trial height value of the last time period,
is the reading of the absolute value encoder at the end of the current time period,
the absolute value encoder is used for reading at the beginning of the current time period, the time length of the time period needs to be selected within the time period, and the rotation of the absolute value encoder does not exceed a half cycle;
(5) trial rod height output module: for outputting the measured probe height.
2. Blast furnace roof according to claim 1Level detection system, its characterized in that: the system further comprises: a zero calibration module: the method is used for lowering the trial rod to be below a 0m stock line and then lifting the trial rod to be above the 0m stock line, and automatically setting the actual height value L of the current trial rod at the moment when the master controller corresponds to the limiting signal from the absence to the presence1Set to 0 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101834463A CN102703633A (en) | 2012-06-06 | 2012-06-06 | Furnace top stock-level detection system for blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101834463A CN102703633A (en) | 2012-06-06 | 2012-06-06 | Furnace top stock-level detection system for blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102703633A true CN102703633A (en) | 2012-10-03 |
Family
ID=46896679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101834463A Pending CN102703633A (en) | 2012-06-06 | 2012-06-06 | Furnace top stock-level detection system for blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102703633A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175414A (en) * | 2013-04-07 | 2013-06-26 | 中冶东方工程技术有限公司 | Stroke control device for skip car or gauge rod and operating method thereof |
| CN104451011A (en) * | 2014-10-24 | 2015-03-25 | 江苏恒创软件有限公司 | Method and device for computing real-time stockline of blast furnace |
| CN105177208A (en) * | 2015-10-10 | 2015-12-23 | 首钢水城钢铁（集团）有限责任公司 | Quick online positioning method for blast furnace stock rod |
| CN107058661A (en) * | 2017-03-07 | 2017-08-18 | 宁波钢铁有限公司 | A kind of blast furnace stock rod control method |
| CN112015131A (en) * | 2020-07-14 | 2020-12-01 | 唐山不锈钢有限责任公司 | Automatic positioning control system and control method for steel-making scrap steel platform car |
| CN114136355A (en) * | 2021-11-13 | 2022-03-04 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for quickly correcting stroke control encoder of blast furnace main coil car |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201068459Y (en) * | 2007-02-15 | 2008-06-04 | 天津市普辰电子工程有限公司 | Blast furnace material level height detection device |
-
2012
- 2012-06-06 CN CN2012101834463A patent/CN102703633A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201068459Y (en) * | 2007-02-15 | 2008-06-04 | 天津市普辰电子工程有限公司 | Blast furnace material level height detection device |
Non-Patent Citations (1)
| Title |
|---|
| 罗刚等: "绝对值编码器在高炉炉顶设备中的应用", 《一重技术》, no. 1, 29 February 2012 (2012-02-29), pages 50 - 53 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175414A (en) * | 2013-04-07 | 2013-06-26 | 中冶东方工程技术有限公司 | Stroke control device for skip car or gauge rod and operating method thereof |
| CN104451011A (en) * | 2014-10-24 | 2015-03-25 | 江苏恒创软件有限公司 | Method and device for computing real-time stockline of blast furnace |
| CN105177208A (en) * | 2015-10-10 | 2015-12-23 | 首钢水城钢铁（集团）有限责任公司 | Quick online positioning method for blast furnace stock rod |
| CN107058661A (en) * | 2017-03-07 | 2017-08-18 | 宁波钢铁有限公司 | A kind of blast furnace stock rod control method |
| CN112015131A (en) * | 2020-07-14 | 2020-12-01 | 唐山不锈钢有限责任公司 | Automatic positioning control system and control method for steel-making scrap steel platform car |
| CN112015131B (en) * | 2020-07-14 | 2021-12-03 | 唐山不锈钢有限责任公司 | Automatic positioning control system and control method for steel-making scrap steel platform car |
| CN114136355A (en) * | 2021-11-13 | 2022-03-04 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for quickly correcting stroke control encoder of blast furnace main coil car |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102703633A (en) | Furnace top stock-level detection system for blast furnace | |
| CN102703632A (en) | Detection method for blast furnace top material level | |
| CN110296664B (en) | Automatic detection device for outer diameter and taper of root canal file | |
| CN104569647A (en) | System and method for testing performance of frequency changer | |
| CN104295288A (en) | Petroleum drilling well depth measuring system and method | |
| CN103604447B (en) | A kind of implementation method of high resolving power incremental bus type photoelectric encoder | |
| CN105329788A (en) | Uniform velocity amplitude-varying control method for jib crane | |
| CN203993544U (en) | A kind of for the circular shaft diameter of part measurement mechanism on general-purpose grinder | |
| CN107324638B (en) | Automatic liquid level control device and method for glass fiber kiln | |
| CN202717788U (en) | Detector for blast furnace top stock level | |
| CN101000361A (en) | Wind analog device | |
| CN205068178U (en) | Instrument keeps automatic regulating system that level used | |
| CN208179119U (en) | One kind is in machine laser detection gear compound graduation circle autocompensation installation | |
| CN100535589C (en) | Automatic detecting method for lining section thickness and tunnel forming machine for realizing the same method | |
| CN204963967U (en) | Intelligent belt formula material monitoring devices that weighs | |
| CN203965530U (en) | A kind of potentiometer device for detecting performance | |
| CN204175287U (en) | Oil drilling well depth survey system | |
| CN103955010B (en) | Portable Automatic check instrument | |
| CN204990035U (en) | Cement multiviscosisty appearance control system | |
| CN205175503U (en) | Industrial furnace's heavy level meter of drill rod formula of inserting to one side | |
| CN2569144Y (en) | Gamma-ray intelligent measuring instrument for river sediment content and flow velocity | |
| CN201852930U (en) | Full-automatic measuring device for load box | |
| CN207335609U (en) | A kind of soil property slope surface coombe section survey device | |
| CN206448842U (en) | Nitrogen protection path pushed bat kiln atmosphere automatic regulating system | |
| CN201981321U (en) | Leveling servo system for drawing frame |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121003 |