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 PDF

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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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South Korea
Prior art keywords
raw material
belt conveyor
unit
supply amount
operation unit
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KR1020150113919A
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Korean (ko)
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KR20170019722A (en
Inventor
김선국
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주식회사 포스코
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    • 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

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feed device for feeding a raw material,

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 material quantity feeder 100 includes a hopper 10 storing raw materials and a belt conveyor 20 feeding and feeding a raw material, and a belt conveyor 20 ) Are installed. The belt conveyor 20 is connected to a drive motor 26 via a speed reducer 28 to a drive wheel 24 for rotating the belt so that the belt is moved by the rotation of the drive motor 26, To supply the discharged raw material.

A load cell 22 for measuring the weight of the raw material to be fed is provided in the lower portion of the belt conveyor 20. Further, the drive motor 26 is provided with a speed sensor 30 for detecting the speed. The moving speed of the belt varies in accordance with the rotating speed of the driving motor 26, so that the supplied amount of the raw material varies in accordance with the rotating speed of the driving motor 26. Accordingly, the raw material can be supplied in a predetermined amount by adjusting the rotational speed of the driving motor 26 according to the amount of raw material discharged to the belt conveyor 20. [

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 motor 26, that is, the belt moving speed of the belt conveyor 20, according to the detected value of the load cell 22 40).

In this embodiment, when the belt moving speed of the belt conveyor 20, that is, the rotating speed of the driving motor 26, is suddenly changed, the control means 40 accurately detects the belt moving speed and discriminates an abnormality of the belt conveyor.

The control means 40 includes a data storage unit 42 connected to the speed sensor 30 for sequentially storing output values of the speed sensor 30, An arithmetic unit 44 for calculating an output value and a deviation of an output value with respect to the current speed of the drive motor 26 inputted from the speed sensor 30; and an arithmetic unit 44 for receiving the deviation value from the arithmetic unit 44, And a comparison operation section (50) for determining the abnormality of the belt conveyor (20) when the deviation value is equal to or larger than the reference value.

The control unit 40 may further include a display unit 54 connected to the comparison operation unit 50 to receive an output signal when the belt conveyor 20 is abnormal and to warn the outside of the output signal. The control unit may further include a motor control unit 56 connected to the comparison operation unit 50 to adjust the speed of the drive motor 26 in response to a control signal of the comparison operation unit 50 when the belt conveyor 20 is abnormal .

Thus, when the belt moving speed of the belt conveyor 20 suddenly rises, the control means 40 can immediately see whether there is an abnormality in the belt conveyor 20 or not, and can directly check the presence or absence of the belt conveyor 20 through the display portion 54 from outside. In addition, when the belt conveyor 20 is abnormal, it is possible to prevent an excessive supply of raw materials for immediate action such as stopping the drive motor 26 through the motor control unit 56.

The speed sensor 30 continuously detects the rotational speed of the drive motor 26. [ The rotation speed of the drive motor 26 detected by the speed sensor 30 is sequentially stored in the data storage unit 42 for each time slot.

For example, the data storage unit 42 sequentially stores the output value of the speed sensor 30 in S1 to Sn-second data according to time. As the data is continuously stored, the data of more than Sn seconds is deleted. The data storage unit 42 stores past data on the rotational speed of the driving motor 26 for each set time period.

The arithmetic unit 44 is connected to the data storage unit 42 and the speed sensor 30 and stores the output value of the speed sensor 30 with respect to the speed of the driving motor 26 in the past time zone applied from the data storage unit 42, And calculates the deviation of the speed detection value of the drive motor 26 detected by the current speed sensor 30. [

The output value applied from the data storage unit 42 to the operation unit 44 is data of a predetermined time period among the sequential data stored in the data storage unit 42. [

The control unit 40 of the present embodiment is connected between the data storage unit 42 and the operation unit 44 and supplies the data stored in the data storage unit 42 to the data storage unit 42. [ And a first switching unit 46 for applying the data of the data memory 42 to the operation unit 44 in a predetermined time period. The first switching unit 46 switches data for each time period recorded in the data storage unit 42 and applies the switching data to the operation unit 44. A time selection unit 48 for setting a time zone is connected to the first switching unit 46 so that an operator can arbitrarily set a time zone to be selected by the first switching unit 46 through the time selection unit 48.

Thus, the data of the time zone set through the time selection unit 48 is applied from the data storage unit 42 to the operation unit 44.

The rotational speed value of the past drive motor 26 is received from the data storage unit 42 and the rotational speed value of the current drive motor 26 is supplied to the speed sensor 30 ) To obtain the deviation of the two values.

The deviation value between the rotational speed of the past driving motor 26 and the rotational speed of the current driving motor 26 obtained by the calculating unit 44 is applied to the comparison calculating unit 44. [

The comparison operation unit 50 stores a predetermined reference value therein, and compares the deviation value applied from the operation unit 44 with the reference value.

The reference value can be understood as a limit value for the allowable range of the rotational speed of the past drive motor 26 and the rotational speed deviation of the current drive motor 26. [ That is, the comparison operation unit 50 compares the deviation value with the reference value, and determines that the variation of the speed of the drive motor 26 is within a permissible range when the deviation value is within the reference value, It is determined that the rotational speed variation amount is out of the permissible range and the abnormality of the belt conveyor 20 is judged.

The operator can arbitrarily set the reference value. To this end, the control unit 40 further includes a reference value setting unit 52 connected to the comparison operation unit 50 to set a reference value. Thus, the operator sets the reference value in the comparison operation unit 50 via the reference value setting unit 52. [ The comparison operation unit 50 compares the deviation value with the reference value according to the reference value applied through the reference value setting unit.

In this manner, the control means 40 can immediately confirm that the belt moving speed of the belt conveyor 20 is abruptly changed through the rotational speed deviation of the driving motor 26 in the set time period. Accordingly, it is possible to prevent overfilling of the raw material by immediately checking the belt conveyor 20 or more and taking necessary measures.

The comparison operation unit 50 compares the deviation value with the reference value and applies an output signal to the display unit 54 and the motor control unit 56 when the deviation value is equal to or greater than the reference value to output the display unit 54 and the motor control unit 56 Control drive.

The display unit 54 is driven in accordance with the application signal of the comparison operation unit 50 to warn the outside of the belt conveying speed of the belt conveyor 20. [ The display unit 54 may have a variety of structures, for example, a warning lamp for visually indicating an abnormality to the outside or a siren for visually indicating an abnormality.

Accordingly, the operator can immediately check the outside of the belt conveyor 20 through the display unit when the raw material feeding speed of the belt conveyor 20 suddenly rises, and take necessary measures.

The motor control unit 56 is for controlling the drive motor 26. The motor control unit 56 receives the output signal of the comparison operation unit 50 and urgently stops the drive motor 26, Adjust the speed.

Thus, when the belt conveying speed of the belt conveyor 20 suddenly increases, the motor control unit 56 is driven in accordance with the output signal of the comparison calculating unit 50 to stop the drive motor 26, .

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 amount setting section 60 for resetting the target supply amount of the raw material, and a control section for outputting the control value of the drive motor 26 in accordance with the target supply amount that is reset in the supply amount setting section 60 And a change comparison operation unit 64 for comparing the output value of the proportional unit 62 with the current output value of the current drive motor 26 and applying a control signal to the motor control unit 56. [ 1, a second switching unit (not shown) for selectively applying an output value of the comparison operation unit 50 or an output value of the change comparison operation unit 64 is provided between the change comparison operation unit 64 and the motor control unit 56 66 are connected.

Therefore, if the feed amount is changed when necessary, the motor control unit 56 adjusts the rotation speed of the drive motor 26 to vary the moving speed of the belt, thereby supplying the raw material to the changed supply amount.

The ratio controller 62 calculates and outputs the rotation speed of the drive motor 26 in accordance with the newly set feed amount set in the feed amount setting unit 60. The change comparison calculation unit 64 compares the output value of the drive motor 26 from the output value of the drive motor 26 newly obtained from the ratio meter 62 and drives the motor control unit 56 in accordance with the output value of the load cell 22, The rotational speed of the motor 26 can be controlled in accordance with the changed supply amount of the raw material. The change comparison operation unit 64 can display the changed feed amount of the raw material, the load ratio of the drive motor 26, and the like through the connected monitor 68 or the like.

If the rotation speed of the drive motor 26 is controlled by the control of the supply amount changing unit, the operation is different from the speed change of the drive motor 26 according to the abnormality of the belt conveyor 20, ) Need to be ignored.

The supply amount changing unit of the present embodiment includes a third switching unit 70 provided between the comparison operation unit 50 and the motor control unit 56 and a second switching unit 70 provided between the driving motor 26 (72) for controlling the third switching unit (70) so that an output value of the comparison operation unit (50) is not applied to the motor control unit (56) when the output value of the motor control unit

The change operation unit 72 controls the third switching unit 70 to shut off the connection between the comparison operation unit 50 and the motor control unit 56 when the raw material supply amount is newly set and controls the third switching unit 70 And connects the change operation unit 72 to the second switching unit 66. [

The second switching unit 66 is switched according to the control signal of the change operation unit 72 and connects the change comparison operation unit 64 to the motor control unit 56. When the output signal of the comparison operation unit 50 is interrupted, the output signal of the change comparison operation unit 64 is applied to the motor control unit 56 to control the drive motor 26 in accordance with the signal of the change comparison operation unit 64 .

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 belt conveyor 20 even if the rotational speed of the drive motor 26 changes .

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 hopper 10 is transported on the belt of the belt conveyor 20 and supplied to the blender. The amount of raw material discharged to the belt is detected through the load cell 22. The moving speed of the belt is controlled according to the detection value of the load cell 22, so that the raw material can be supplied in a fixed amount according to the desired supply amount.

The rotational speed of the drive motor 26 is suddenly increased due to an abnormality of the load cell 22 or a belt engagement in the course of supplying the raw material, and the moving speed of the belt suddenly rises.

When the rotational speed of the drive motor 26 suddenly rises, it is determined that the belt conveyor 20 is abnormal according to the driving of the control means 40 of the present embodiment to stop the drive motor 26, 26 can be prevented from being overloaded.

That is, the present embodiment continuously detects the rotational speed of the belt of the belt conveyor 20, which feeds the raw material in order to supply the raw material quantitatively. (S100) The driving motor 26, detected through the speed sensor 30, The rotation speed of the drive motor 26 stored in the data storage unit 42 is applied to the operation unit 44. The rotation speed of the drive motor 26 is stored in the data storage unit 42 in step S110.

The operation unit 44 calculates the output value of the past drive motor 26 and the output value of the current drive motor 26 applied from the speed sensor 30 and obtains the deviation value from the data storage unit 42. In operation S120,

The deviation value obtained by the operation section 44 is applied to the comparison operation section 50. The comparison operation section 50 compares the previously set reference value with the deviation value to determine whether the deviation value is equal to or larger than the reference value.

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 drive motor 26 is out of the allowable range, and the belt conveyor 20 is determined to be abnormal.

When abnormality of the belt conveyor 20 is detected, the abnormality of the belt conveyor 20 is displayed visually or audibly to the outside, and a control signal is outputted to the motor control unit 56 to stop the drive motor 26, for example, Or the rotational speed of the drive motor 26 is lowered. (S160 to S170)

Thus, when the belt moving speed of the belt conveyor 20 suddenly rises suddenly, it is possible to immediately check whether there is an abnormality in the belt conveyor 20 and to stop the driving motor 26 to prevent the excessive supply of the raw material .

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 motor 26 is changed.

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 necessary drive motor 26 is calculated according to the set target supply amount (S140 to S150).

The rotation speed of the drive motor 26 is compared with the rotation speed of the current drive motor 26 to control the rotation speed of the drive motor 26. (S170) Is set according to the newly set target supply amount and the belt is moved at a necessary moving speed to supply the raw material.

Here, when the change in the rotation speed of the drive motor 26 is caused by the change in the target supply amount of the raw material, the drive motor 26 is controlled in accordance with the change in the target supply amount of the raw material while ignoring the subsequent process according to the comparison between the deviation value and the reference value.

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 controller 20 determines whether or not the target supply amount has been reset. If the target supply amount is not reset, the warning display process and the driving motor 26 speed adjustment process are performed. If the target supply amount is reset, even if the deviation value is equal to or greater than the reference value, the drive motor 26 is not judged to be abnormal and the warning display process is not performed thereafter.

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)

A belt conveyor for conveying the raw material discharged from the hopper storing the raw material, a load cell for detecting the weight of the raw material discharged to 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 and,
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. The method according to claim 1,
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. The method according to claim 1,
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. The method according to claim 1,
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. 5. The method of claim 4,
And a reference value setting unit connected to the comparison operation unit to set a reference value. delete delete The method according to claim 1,
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 method for feeding a raw material quantitatively by controlling the rotational speed of a driving motor for moving 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 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. 10. The method of claim 9,
And a warning step of displaying the information on the outside when the belt conveyor abnormality is determined. 10. The method of claim 9,
And controlling the rotational speed of the driving motor when the belt conveyor abnormality is determined. delete delete 11. The method of claim 10,
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.
KR1020150113919A 2015-08-12 2015-08-12 Constant feed weigher for raw material and constant feeding method for the same KR101796747B1 (en)

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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

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