KR20010064363A - Defect detection system of return roller in blast furnace charging belt - Google Patents

Abstract

PURPOSE: Detecting system of defect in a return roller is provided to stabilize a high furnace work by stabilizing a charging belt continuously operated for realizing remote control. CONSTITUTION: In a return roller, a bracket guide for holding the return roller is installed and to the middle portion thereof, a shaft is connected. A drum for protecting the shaft and bearings are provided at both sides. Upon checking damage of roller drum caused by separation of shaft and drum, damage of roller drum caused by frictional heat at a temperature detecting unit(12) and temperature rise caused by wear of bearing are detected. The data offered at a positional detecting unit(11) and a temperature detecting unit(12) are converted for a computer to recognize by a conversion unit(13) to be input to an input device(14). On signal supplied to a computer(17) controlling and monitoring furnace equipment, a state of return roller is trended transmitted to an alarm memory unit(20).

Description

DEFECT DETECTION SYSTEM OF RETURN ROLLER IN BLAST FURNACE CHARGING BELT}

The present invention relates to a system for detecting a defect of a return roller installed in a charging belt conveyor for transporting raw materials charged into a blast furnace, and more particularly, a plurality of return rollers installed in a belt conveyor are remotely monitored, so The present invention relates to a return roller defect detection system of a blast furnace charging belt that can effectively perform facility management by judging the cycle of replacement in case of breakage and damage to the drum wrapped outside the shaft.

In general, when the molten iron is produced in the blast furnace, as shown in Figs. 1 and 2, a belt conveyor (2) is used to transport iron ore, which is a main raw material, and coke, which is a fuel, to a charging hopper (1) of the final labor administration. The belt conveyor 2 maintains a constant inclination angle according to the size of the blast furnace 3.

On the other hand, one side of the belt conveyor (2) is equipped with a large drive motor (4) for driving it and the rotational force of the drive motor (4) is transmitted to the belt conveyor (2) by a plurality of drive pulleys (5) Carrier rollers (not shown) are mounted in the advancing direction of the belt conveyor 2, and a plurality of return rollers 6 are mounted on the lower part of the belt conveyor 2 returned via the head portion of the belt conveyor 2. It is supposed to be cloud movement.

However, the carrier rollers installed on the lower surface of the belt advancing direction are densely installed so that even if one or two of them are damaged, they do not significantly affect the traveling direction of the belt conveyor 2, so that the meandering of the belt conveyor 2 does not occur, but the return roller does not occur. In (6), since the installation interval is provided at a position four times more than the carrier roller, even if only one is broken, the return roller 6 at the front end or the rear end receives the load intensively, causing chain breakage.

Therefore, even if one of the multiple return rollers 6 is damaged, the blast furnace 3 temporarily stops the loading of raw materials and temporarily stops the belt conveyor 2 for repair time, thereby restarting the operation after replacement. In the blast furnace (3) it is not possible to charge the charge during the repair and replacement operation time, the instability of the blast furnace blast furnace due to the deterioration of the charge level of the blast furnace (3).

Alternatively, when the shaft of the return roller 6 is continuously operated in a state where the shaft of the return roller 6 is damaged or the drum part is damaged, the risk of fire and loss of the belt conveyor 2 remains. In the worst case, the blast furnace operation was stopped for a long time. .

In addition, the long-term belt conveyor (2) has a long length, it is practically difficult for the operator to check a large number of return rollers (6) due to dust generated during the transportation of raw materials, and before the repair to stop the operation of the blast furnace (3) In order to check the belt conveyor (2) during operation, a large number of high-quality personnel should be put in. In this case, the operator should check the abnormality of the return roller (6) by listening to the abnormal sound of the return roller (6) with his / her ear. Therefore, there was a problem that can not be detected quickly and accurately defects.

The present invention has been invented to solve the above problems, by detecting more than the number of shafts and drums of the return roller installed in the long-term belt conveyor more accurately by establishing a system for monitoring at a long distance to detect the abnormality of the return roller early Provides the return roller defect detection system of the blast furnace charging belt, which enables remote monitoring to stabilize the blast furnace operation by enabling the planned repair and repairing the suddenly damaged return rollers to stabilize the blast furnace charging belt. Its purpose is to.

The present invention for achieving the above object is to determine the axial damage of the plurality of return rollers installed in the belt conveyor which is a transport equipment for charging the raw material into the blast furnace and the damage of the drum wrapped around the shaft, the drum side of the return roller A position detecting unit installed at a position to check for damage to the drum, a temperature detecting unit installed at the same point as the shaft of the return roller to detect a temperature due to frictional heat, a data converting unit converting the data so that the computer can recognize the same, An input device to which the signal converted by the data conversion unit and the air temperature and belt operation signal are input, an operation unit for calculating and processing data according to the input signal, a communication unit connected between the operation unit and a computer and transmitting a signal; A status display unit connected to the computer to display the status of the return roller, and an alarm to the driver in case of a return roller error. A doengeot hayeoseo includes an alarm that ball.

1 is a schematic view showing a typical charging belt,

Figure 2 is a perspective view of a conventional charging belt,

3 is a cross-sectional view of a state in which a defect detection apparatus according to the present invention is installed;

4 is a block diagram of a defect detection system according to the present invention;

5 is a flowchart of a defect detection system according to the present invention.

<Explanation of symbols for the main parts of the drawings>

6: return roller 6a: shaft

11: position detector 12: temperature detector

13 conversion unit 14 input device

15: calculation unit 16: communication unit

17: Computer 18: Status Display

19: alarm generating unit 20: alarm memory unit

Hereinafter, the present invention will be described in detail with reference to FIGS. 3 to 5.

3 is a cross-sectional view of a state in which a defect detection apparatus according to the present invention is installed, FIG. 4 is a block diagram of a defect detection system according to the present invention, and FIG. 5 is a flowchart of a defect detection system according to the present invention. In the belt conveyor (2) facility, which is a facility for continuously transporting the gears, a position detecting unit (11) is installed on the side of the drum of the return roller (6) to check for damage to the drum. The temperature detection part 12 which detects the temperature by this is provided.

On the other hand, the conversion unit 13 for converting each of the above data to be recognized by the computer and the air temperature and belt operation signal is input to the input device 14 and the calculation unit 15 for processing the data by the input signal is The input device 14 is connected to the communication unit 16 that communicates with the blast furnace process computer 17.

The computer 17 has an alarm memory for storing an alarm together with a status display unit 18 for displaying a state of the return roller 6 and an alarm generator 19 for providing an alarm to the driver when the return roller 6 is abnormal. The part 20 is provided.

According to the present invention configured as described above, when power is supplied to the belt conveyor 2 for transporting raw materials, power is transmitted by the driving motor and the coupling to cause rotational movement, and the belt conveyor is driven.

In order to smoothly drive the belt conveyor 2, a snap pulley 8 is installed at a lower portion of the head pulley 7, and a plurality of drive pulleys 5 are installed at 400M points of the head pulley 7. The speed sensor which detects the rotation speed of the belt conveyor 2 is provided.

And the tension pulley (9) is installed at the 10M point of the belt conveyor (2) and the weight is installed to control this by adjusting the tension of the belt conveyor is installed in the upper 150M point to transfer the power of the drive motor (4) The drive pulley 10 is finally installed to smooth the belt conveyor 2.

In addition, the return roller (6) is provided with a bracket guide for holding the return roller (6), the middle of the return roller (6) is connected to the shaft, the drum to protect the shaft and the bearings are inserted on both sides and the outer The hard plate is installed in the end and the key groove is installed in the end structure is inserted into the bracket.

Accordingly, as a means for solving the problem of damage in multiple stages due to the frictional force of the return roller 6 installed in the above-described form, the position detecting unit installed on the drum side of the return roller 6 in the belt conveyor facility, which is a continuous transport facility on the raw material site ( 11) When the damage of the roller drum caused by the separation of the shaft and the drum due to the fatigue due to frictional force is checked, the roller drum is damaged by frictional heat and the wear of the bearing is caused by the heat detection unit 12 installed on the shaft 6a at the same point. Detect rise in temperature due to

On the other hand, the data provided by the position detection unit 11 and the temperature detection unit 12 is converted by the conversion unit 13 so as to be recognized by the computer is input to the input device 14, the input device 14 of the atmospheric temperature When the air temperature and the charging belt operation signal for obtaining the alarm detection data according to the change are input, the input signal is compared with the air temperature, and when the set value is reached, the data is transmitted to the calculation unit 15 for calculating and processing the data to output the alarm.

When the signal is transmitted to the blast furnace process computer 17 which controls and monitors the blast furnace equipment by the communication unit 16, the state of the return roller 6 is trended by the computer 17 and shared with the past data. Determining when to replace the return roller 6 while the status display unit 18 and the alarm generating unit 19 which provide an alarm to the driver in case of abnormality of the return roller 6 are operated together. All data is transmitted to the alarm memory unit 20 to remember the alarm to secure the evidence for.

That is, when the operation of the present invention is described with reference to FIG. 5, the start command is output to detect whether the return roller is damaged, and the operation of the charging belt conveyor is determined. If the system is abnormal, an alarm is triggered.

On the other hand, if the data starts to be detected in the normal state, it is checked whether the position detecting unit 11 installed in the plurality of return rollers is operated, and the data input from the plurality of temperature detecting units 12 is input to the input device 14 and this signal is received. Comparing with the atmospheric temperature in the calculation unit 15 when the rising temperature caused by the damage of the drum and the bearing of the return roller, that is, when the ambient temperature is determined to be +20 ℃ or more, it generates an alarm and remembers it.

In addition, when the drum and the shaft part or the whole due to fatigue is separated and the position detection unit 11 operates, an alarm is generated and stored as it is used as a basis for determining the future replacement time of the return roller.

The detected temperature is accumulated and managed as a trend, which is also used as a basis for judging when to return the return roller in the future.

By detecting whether the return roller is damaged or not, the damage of the charging belt conveyor can be prevented and large accidents caused by this can be prevented in advance, and a large number of return rollers in the field can be predicted by remote unmanning without visual inspection. Management is a very useful invention that can minimize the check of the harsh environment by dust (dust) and mist (mist), and prevent the continuous operation of the blast furnace.

Claims (1)

In judging the axial breakage of a plurality of return rollers installed in a belt conveyor, which is a transportation equipment for charging raw materials into the blast furnace, and the damage of the drum wrapped outside the shaft, A position detecting unit 11 installed on the side of the drum of the return roller 6 to check for damage to the drum, and a temperature detecting unit installed at the same point of the shaft 6a of the return roller 6 to detect temperature due to frictional heat. (12), a data conversion unit 13 for converting the data so that the computer 17 can recognize, and an input device into which the signal converted by the data conversion unit 13, the air temperature, and the belt operation signal are input. (14), an arithmetic unit 15 for arithmetic processing of data based on the input signal, a communication unit 16 connected between the arithmetic unit 15 and the computer 17 to transmit a signal, and the computer 17 Blast furnace charging characterized in that it comprises a state display unit 18 connected to the display roller 18 to display the state of the return roller 6, and an alarm generator 19 to provide an alert to the driver when the return roller 6 is abnormal. Return roller defect detection system of the belt.