KR101796747B1 - Constant feed weigher for raw material and constant feeding method for the same - Google Patents
Constant feed weigher for raw material and constant feeding method for the same Download PDFInfo
- Publication number
- KR101796747B1 KR101796747B1 KR1020150113919A KR20150113919A KR101796747B1 KR 101796747 B1 KR101796747 B1 KR 101796747B1 KR 1020150113919 A KR1020150113919 A KR 1020150113919A KR 20150113919 A KR20150113919 A KR 20150113919A KR 101796747 B1 KR101796747 B1 KR 101796747B1
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- KR
- South Korea
- Prior art keywords
- raw material
- belt conveyor
- unit
- supply amount
- operation unit
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/0033—Charging; Discharging; Manipulation of charge charging of particulate material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
- F27B21/06—Endless-strand sintering machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/02—Skids or tracks for heavy objects
- F27D3/026—Skids or tracks for heavy objects transport or conveyor rolls for furnaces; roller rails
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
- F27D2003/0063—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising endless belts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Conveyors (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
A belt conveyor for conveying a raw material discharged from a hopper in which raw materials are stored so as to prevent overfilling of raw materials in the process of supplying raw materials for sintering and accurately detect and cope with an abnormal belt speed change of the belt conveyor, And a control means for controlling the belt rotation speed of the belt conveyor in accordance with the detected value of the load cell, wherein the control means is connected to a speed sensor for detecting the rotation speed of the driving motor of the belt conveyor A data storage unit for sequentially storing output values of the speed sensors, an operation unit for calculating a deviation between an output value of a past time zone set in the data storage unit and an output value of a current drive motor input from the speed sensor, By comparing this deviation value with a predetermined reference value, Or more reference, provides a quantitative raw material supply device that includes a comparison operation for determining the belt conveyor and above.
Description
The present invention relates to a feeding device and a feeding method for feeding a sintering raw material at a predetermined ratio and supplying the same in a fixed amount.
For example, in the sintering process, various raw materials such as ore and anthracite supplied from a raw hopper are supplied in a constant amount feeder (CFW), mixed in a drum mixer, and stored in a raw material bin. Thereafter, the compounding raw material is supplied to the sintering machine from the compounding raw material bin, and finally, it is produced as an sintered ores.
The quantitative feeder is a device for continuously supplying the raw materials of various conditions according to the set value of the prescribed mixing ratio and is a core device of the sintering process which requires thorough management since the quality of the sintered ores is affected as well as the overall operation.
The quantitative feeder includes a load cell for detecting the weight of the raw material discharged from the hopper and a belt conveyor for conveying the raw material. Accordingly, if the target supply amount is set according to the operating ratio of the raw materials stored in the hopper for the sintering operation, the supply amount is calculated according to the detected value of the load cell and the belt speed of the belt conveyor, and the raw material can be supplied in an accurate amount.
However, in the process of supplying the raw material, the weight of the raw material is not accurately detected due to the abnormal occurrence of the load cell or the catching of strangeness or foreign matter, so that the raw material supply is not normally performed. If the raw material supply is not properly performed, the belt speed of the belt conveyor suddenly rises while the operation of the apparatus is controlled to adjust the target supply amount.
Therefore, there is a problem that the raw material is over-fed due to an increase in the rotational speed of the belt, which adversely affects the raw material blended components and shortens the service life of the belt conveyor due to overload. In spite of this problem, the quantitative feeder is automatically controlled and operated. In the past, it is very difficult for an operator to recognize the feeder.
The present invention provides a raw material quantitative supply device and a supply method that can prevent overproduction of raw materials during the supply of raw materials for sintering.
The present invention provides a raw material quantitative supply device and a supply method for precisely detecting and coping with a change in an abnormal belt speed of a belt conveyor generated in a process of supplying raw materials for sintering.
The quantitative feed device of this embodiment includes a belt conveyor for conveying a raw material discharged from a hopper in which a raw material is stored, a load cell for detecting the weight of the raw material discharged to the belt conveyor, a belt rotation speed sensor And control means for controlling the control means,
The control means includes a data storage unit connected to a speed sensor for detecting the rotational speed of the driving motor of the belt conveyor and sequentially storing output values of the speed sensor, And a comparison operation unit for comparing the deviation value with a preset reference value to determine a belt conveyor abnormality when the deviation value is equal to or greater than the reference value.
And a display unit connected to the comparison operation unit to receive an output signal when the belt conveyor is abnormal and warn the outside of the belt conveyor.
And a motor control unit connected to the comparison operation unit to receive the control signal of the comparison operation unit and adjust the speed of the drive motor when the belt conveyor is abnormal.
And a first switching unit connected between the data storage unit and the operation unit to apply data of the data storage unit to the operation unit for a predetermined time period.
And a reference value setting unit connected to the comparison operation unit to set a reference value.
The control means may further include a supply amount changing portion for changing the raw material supply amount.
A supply amount setting unit for resetting the target supply amount of the raw material; a ratio generator for outputting a control value of the drive motor according to the target supply amount re-set in the supply amount setting unit; And a change comparison operation unit for comparing the output value and applying a control signal to the motor control unit.
The supply amount changing unit may include a second switching unit installed between the comparison operation unit and the motor control unit and a second switching unit provided between the comparison operation unit and the motor control unit so that the output value of the comparison operation unit is not applied to the motor control unit when the output value of the drive motor is changed according to the set value of the supply amount setting unit And a change operation unit for controlling the second switching unit.
The quantitative supply method of the present embodiment is a method of supplying a fixed amount of raw material by controlling the rotational speed of a driving motor that moves a belt according to the weight of a raw material discharged from a hopper and supplied through a belt conveyor,
A data storing step of sequentially storing the detected driving motor rotational speed values, a step of storing the driving motor rotational speed values of the past past time periods and the current driving motor rotational speed values A deviation calculation step of calculating a deviation, and an abnormality determination step of comparing the calculated deviation value with a predetermined reference value and discriminating an abnormality of the belt conveyor when the deviation value is equal to or greater than the reference value.
The quantitative feeding method may further include a warning step of displaying the measured value when the belt conveyor is abnormal.
The quantitative feeding method may further include a control step of controlling the rotational speed of the driving motor when the belt conveyor is abnormal.
The quantitative feeding method may further include a target feeding amount changing step for changing the feeding amount of the raw material.
Wherein the target supply amount changing step includes a reset determination step of determining whether to reset the target supply amount of the raw material, a proportional output step of calculating and outputting the rotation speed of the drive motor in accordance with the target supply amount of the raw material, And a control step of controlling the driving motor rotational speed by comparing the driving motor rotational speed with the current driving motor rotational speed.
Wherein, in the target supply amount changing step, the reset determination step is performed before the warning step, and when the deviation value is equal to or greater than the reference value in the abnormality determination step and the raw material target supply amount is reset in the reset determination step, The output signal can be ignored.
As described above, according to this embodiment, by accurately detecting the belt conveying speed change of the belt conveyor, the driver can quickly take necessary measures. Thus, by preventing the raw material and the supply due to the rapid increase of the belt conveying speed, it is possible to stabilize the operation, to increase the productivity, and to maintain the quality of the sintered ores constant.
In addition, it is possible to prevent an overload from being applied to the motor of the belt conveyor, thereby preventing equipment accidents and prolonging the service life of the device.
Fig. 1 is a schematic view showing a configuration of a raw material quantity feeder according to the present embodiment.
FIG. 2 is a schematic flowchart sequentially showing a raw material quantity supplying process according to the present embodiment.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto. Means that a particular feature, region, integer, step, operation, element and / or component is specified, and that other specific features, regions, integers, steps, operations, elements, components, and / And the like.
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the following description, the present embodiment describes an apparatus for supplying a sintering raw material in a fixed amount in the sintering apparatus as an example. The present invention is not limited to this, and can be applied to all the equipment including the sintering equipment and supplying and discharging the raw materials stored in the hopper.
Fig. 1 is a schematic view showing a configuration of a raw material quantity feeder according to the present embodiment.
1, the raw
A load cell 22 for measuring the weight of the raw material to be fed is provided in the lower portion of the
The feeding device of the present embodiment includes control means for controlling the feed rate of the raw material by adjusting the rotational speed of the driving
In this embodiment, when the belt moving speed of the
The control means 40 includes a
The
Thus, when the belt moving speed of the
The
For example, the
The
The output value applied from the
The
Thus, the data of the time zone set through the
The rotational speed value of the
The deviation value between the rotational speed of the
The comparison operation unit 50 stores a predetermined reference value therein, and compares the deviation value applied from the
The reference value can be understood as a limit value for the allowable range of the rotational speed of the
The operator can arbitrarily set the reference value. To this end, the
In this manner, the control means 40 can immediately confirm that the belt moving speed of the
The comparison operation unit 50 compares the deviation value with the reference value and applies an output signal to the
The
Accordingly, the operator can immediately check the outside of the
The
Thus, when the belt conveying speed of the
Further, the control means (40) may further include a supply amount changing portion for changing the supply amount of the raw material when necessary.
In the present embodiment, the supply amount changing section includes a supply
Therefore, if the feed amount is changed when necessary, the
The
If the rotation speed of the
The supply amount changing unit of the present embodiment includes a
The
The
As described above, when the belt conveying speed is varied in the resetting of the feed amount, normal operation can be maintained without judging the abnormality of the
Hereinafter, the process of supplying the raw material according to the present embodiment will be described with reference to FIG.
The raw material discharged from the
The rotational speed of the
When the rotational speed of the
That is, the present embodiment continuously detects the rotational speed of the belt of the
The
The deviation value obtained by the
Accordingly, when the deviation value is equal to or greater than the reference value, it is determined that the rotational speed variation amount of the
When abnormality of the
Thus, when the belt moving speed of the
Further, the feeding method of the present embodiment can change the target supply amount of the raw material, if necessary. The belt moving speed is changed in accordance with the change of the raw material target supply amount, and the rotational speed of the driving
That is, it is determined whether or not the raw material target supply amount has been reset, and when the target supply amount is reset, the rotation speed of the
The rotation speed of the
Here, when the change in the rotation speed of the
For this, in the present embodiment, the process of determining whether the target supply amount is reset may be performed after the process of determining whether the deviation value is equal to or greater than the reference value.
If the deviation value is equal to or greater than the reference value, the
While the illustrative embodiments of the present invention have been shown and described, various modifications and alternative embodiments may be made by those skilled in the art. Such variations and other embodiments will be considered and included in the appended claims, all without departing from the true spirit and scope of the invention.
10: hopper 20: belt conveyor
22: load cell 26: drive motor
30: speed sensor 40: control means
42: Data storage unit 44: Operation unit
46: first switching unit 48: time selector
50: comparison operation section 54:
56: motor control unit 60: supply amount setting unit
62: Rate comparator 64: Change comparator
66: second switching unit 70: third switching unit
72:
Claims (14)
The control means includes a data storage unit connected to a speed sensor for detecting the rotational speed of the driving motor of the belt conveyor and sequentially storing output values of the speed sensor, A comparison operation unit which receives a deviation value from the operation unit and compares the deviation value with a preset reference value and determines a belt conveyor abnormality when the deviation value is equal to or greater than a reference value; A motor control section for adjusting the speed of the motor, and a supply amount changing section for changing the feed amount of the raw material,
A supply amount setting unit for resetting a target supply amount of the raw material; a ratio generator for outputting a control value of the drive motor according to the target supply amount re-set in the supply amount setting unit; And a change comparison operation unit that compares the output value and applies a control signal to the motor control unit.
And a display unit connected to the comparison operation unit to receive an output signal when the belt conveyor is abnormal and to warn the outside of the output signal.
And a motor control unit connected to the comparison operation unit to receive the control signal of the comparison operation unit and adjust the speed of the drive motor when the belt conveyor is abnormal.
And a first switching unit connected between the data storage unit and the operation unit to apply data of the data storage unit to the operation unit for a predetermined time period.
And a reference value setting unit connected to the comparison operation unit to set a reference value.
The supply amount changing unit may include a second switching unit provided between the comparison operation unit and the motor control unit and a second switching unit provided between the comparison operation unit and the motor control unit to prevent the output value of the comparison operation unit from being applied to the motor control unit when the output value of the drive motor varies according to the set value of the supply amount setting unit And a change operation unit for controlling the second switching unit.
A data storing step of sequentially storing the detected driving motor rotational speed values, a step of storing the driving motor rotational speed values of the past past time periods and the current driving motor rotational speed values An abnormality determination step of comparing the calculated deviation value with a preset reference value to determine an abnormality of the belt conveyor when the deviation value is equal to or greater than a reference value, and a target supply amount changing step for changing the supply amount of raw material,
Wherein the target supply amount changing step includes a reset determination step of determining whether to reset the target supply amount of the raw material, a proportional output step of calculating and outputting the rotation speed of the drive motor in accordance with the target supply amount of the raw material, And a control step of controlling the rotation speed of the driving motor by comparing the rotation speed of the driving motor with the rotation speed of the current driving motor.
And a warning step of displaying the information on the outside when the belt conveyor abnormality is determined.
And controlling the rotational speed of the driving motor when the belt conveyor abnormality is determined.
Wherein the reset determination step is performed before the warning step and when the deviation value is equal to or greater than a reference value in the abnormality determination step and the raw material target supply amount is reset in the reset determination step, Supply method.
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Cited By (1)
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KR102232991B1 (en) * | 2020-08-10 | 2021-03-29 | 아세아시멘트(주) | Silo apparatus control system to prevent over-supply, and silo device comprising the same |
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KR20200065885A (en) * | 2018-11-30 | 2020-06-09 | 주식회사 포스코 | Apparatus for tracking raw materials in real time |
KR102316071B1 (en) * | 2021-06-29 | 2021-10-25 | (주)하나하드닝 | Continuous Furnace Heat Treatment Feeder Automation System |
Citations (1)
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KR101232894B1 (en) * | 2012-09-18 | 2013-02-13 | 에너시스(주) | Fault tolerant control method of the belt-conveyor type constant feeder |
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KR101232894B1 (en) * | 2012-09-18 | 2013-02-13 | 에너시스(주) | Fault tolerant control method of the belt-conveyor type constant feeder |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR102232991B1 (en) * | 2020-08-10 | 2021-03-29 | 아세아시멘트(주) | Silo apparatus control system to prevent over-supply, and silo device comprising the same |
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