KR101353136B1 - Method and apparatus for on-line checking continuous casting facilities - Google Patents

Abstract

The present invention relates to a method and apparatus for checking the roll state of a strand, which is a machine equipment, and provides a roll state information to an operator by automatically measuring the player strand roll state at every casting start without taking a separate time inline. It provides an online inspection system for performance equipment that automates the process.

Description

On-line checking continuous casting facilities {Method and apparatus for on-line checking continuous casting facilities}

The present invention relates to a method and apparatus for checking a roll state of a strand, which is a machine equipment, and more particularly, to automatically measure a roll state at each casting start time and to transmit it to an operation room so that an operator can determine a roll equipment state. The present invention relates to a method and apparatus for enabling management.

Since the state of the machine strands has a great influence on the performance of the casting and the quality of the cast steel, it is essential to check and manage the roll state of the strand to ensure the quality of the cast and to improve the productivity.

However, the current strand checker (roll checker) is difficult to check and monitor the roll condition of the strand.

This is because, first, a separate inspection time is required. In other words, during the non-casting (regular repairs, planned stops, etc.), the inspection takes about 45 minutes. Accordingly, repair time is required as a separate strand condition check, re-check time for checking the condition after strand repair is reduced, and casting productivity is reduced due to the casting stop.

Second, there is insufficient strand equipment inspection data due to lack of inspection frequency (1-2 times / month). As a result, it is difficult to know the condition of the equipment periodically, so it is difficult to maintain the optimal condition, and it is difficult to quantify the effect of the condition on the cast steel, making it impossible to quantify the correlation. There is difficulty in maintenance and facility management, such as segment maintenance and replacement cycle setting, and it is not possible to reflect strand facility status in the quality inquiry system currently under development.

Japanese Patent Laid-Open No. 2001-47205 discloses a measuring device for stably measuring a guide roll gap in a continuous casting device to improve measurement accuracy, and Japanese Patent Laid-Open No. 2001-269756 provides power supply and transfer of measurement results. Disclosed is a roll gap measuring device of a continuous casting machine which is carried out by a non-contact method and prevents a decrease in device operation rate due to connector deterioration. Japanese Patent Laid-Open Publication No. 2004-37089 discloses a roll gap measuring method of a continuous casting machine capable of measuring roll gap more accurately. It is implicated.

The present invention has been made to solve the above-mentioned problems of the prior art, the object of the present invention by grasping the state of the player strands from time to time, to ensure the stable quality of the cast steel online inspection method and inspection apparatus To provide.

The present invention comprises the steps of preparing a movement after loading the dummy bar mounted on the dummy bar, the dummy bar equipped with a roll check device main body, including a roll status check sensor, a battery, a data logger; Releasing the auto joint coupled to the roll checking device main body, and then operating the data logger in response to a moving start signal of the dummy bar car; Inserting the dummy bar into the mold of the player, and measuring the roll state to some segment of the strand; Inserting the dummy bar completely into the strand and initiating casting; Continuously measuring the roll state of the strand until the dummy bar passes completely through the player; Recovering the dummy bar with the dummy bar car, and then coupling and filling the auto joint with the roll checking device main body; Transmitting the roll state measurement data wirelessly to the host computer by means of an auto joint coupling signal, and then storing and analyzing the measurement data; And transmitting the analysis data to a server and inquiring on a web.

The continuous casting facility inspection method according to the present invention is characterized in that the roll state is checked online at least twice / day at the time of casting, and further, except that the operation of inserting and collecting the dummy bar is automatically performed. .

According to the continuous casting equipment inspection method of the present invention, through the control panel connected to the roll inspection apparatus main body and the software installed in the host computer, the operation of the roll inspection apparatus main body, whether the auto joint is engaged, the battery charging status, It automatically controls the operation of the inspection unit and the joint of the auto joint, and the measurement data can be inquired, compared, analyzed and converted.

According to the continuous casting facility inspection method of the present invention, the control panel connected to the roll inspection device and the software installed in the host computer is a sensor calibration function, sensor failure notification function, sensor protection function, battery power saving function, battery remaining alarm function, data analysis Function and the like.

In addition, the present invention is a sensor unit including a sensor for measuring the gap and alignment of the roll; A data logging unit including a data logger for recording data measured by the sensor unit, a radio frequency box and a wireless LAN box for wirelessly transmitting and receiving measurement data and control signals, and a battery for supplying power; An auto joint unit coupled to the data logging unit to charge a battery and to transmit and receive data and control signals by wire; A control unit including a radio frequency box for wirelessly transmitting and receiving to and from the radio frequency box and the wireless LAN box of the data logging unit, an auto joint unit and a network hub connected by wire to the access point, and a control panel connected to the network hub; A computer unit connected to the control unit and having a program to store and analyze measurement data and to control the control unit; And a workstation unit including a server connected to the computer unit.

In the continuous casting facility inspection apparatus of the present invention, the inspection apparatus body including a sensor unit and a data logging unit is configured, the body may be mounted on the dummy bar.

In the continuous casting equipment inspection apparatus of the present invention, the sensor unit includes a roll interval sensor and a roll alignment sensor detachably coupled to the inspection apparatus main body, the roll interval sensor is a caliper type or lever type with a potentiometer built-in, the roll alignment sensor is It may be an inclinometer type.

According to the present invention, the player strand roll state can be automatically measured at every casting start without incurring a separate time in-line to provide the roll state information to the operator, and the operator can automate most processes. There is no need to handle the measuring device.

Figure 1 schematically shows the configuration of the playing equipment.
Figure 2 schematically shows the overall configuration of the online performance equipment inspection system according to an embodiment of the present invention.
3 illustrates a configuration of a dummy bar to which a roll checking apparatus main body is mounted according to an embodiment of the present invention.
Fig. 4 schematically shows the configuration of a caliper type roll gap sensor used in accordance with one embodiment of the present invention.
5 illustrates a calibration screen of the roll gap sensor.
6 illustrates a control panel of an auto joint on an HMI screen.
7 illustrates a roll check system status check function.
8 illustrates the roll interval (top) and roll alignment measurements (bottom) through data analysis software.
9 illustrates a comparison function (upper) with a previous measurement value and an error level checking function (lower) compared to a reference.
10 illustrates a web inquiry function.
11 illustrates the operation performance of the on-line inspection system according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic configuration diagram of a performance equipment, in which continuous casting equipment is generally supplied with a molten steel contained in a ladle 1 to a tundish 2, and the molten steel of the tundish 2 is It is supplied to the mold 3 through the immersion nozzle installed in the lower portion, the molten steel supplied to the mold 3 is cast into a cast (for example slab) 6 having a predetermined width and thickness while being cooled through the strand (4). . The strand 4 may be composed of a plurality of segments, and a plurality of rolls 5 for guiding the cast pieces are provided at upper and lower portions of the strand 4 at regular intervals, respectively.

In order to move the cast piece 6 thus formed, a commonly known dummy bar 7 is used. That is, as shown in Fig. 1, the dummy bar 7 is drawn out by pulling the dummy bar 7 in the state where the dummy bar 7 is inserted into the mold 3 at the beginning of the performance. For example, continuous casting of the cast steel 6 is performed by injecting molten steel into the mold 3 such that the cast steel 6 smoothly reaches the curved portion of the lower portion of the mold 3 and the ends of the strand equipment 4 only by its own weight. Since it cannot be conveyed, the dummy bar 7 is connected to the tip of the cast 6 to draw the cast 6 from the mold 3 and the strand 4. The dummy bar car 8 is used to transport the dummy bar 7 to the mold 3.

FIG. 2 is a schematic configuration diagram of a performance equipment on-line inspection system according to the present invention, which includes a sensing part 10 and 11, a data logging part 20, and an auto joint part. auto joint part 30, local control part 40, operating computer part 50, workstation part 60, and the like, which are one module Alternatively, they may be combined in a panel form or configured independently, and may be connected to each other by wire and / or wireless, respectively.

The sensor units 10 and 11 are constituted by a pair of left and right sides, that is, a left sensor unit 10 and a right sensor unit 11, and each of the sensor units 10 and 11 includes a gap sensor 12 and 13. , Roll alignment sensors 14, 15, signal conditioners 16, 17, junction boxes 18, 19, and the like.

The roll gap sensors 12 and 13 are sensors for measuring the gap between the upper and lower rolls of the performance equipment strand, and use a caliper type, a lever type, and the like with a potentiometer. Can be. Conventionally, a linear type contact sensor with a linear variable differential transformer (LVDT) is used as a linear type, and a measuring range of about 230 mm is proposed, in particular, using an anvil serving as a measuring posture support. It has a high impact on measurement accuracy, battery consumption and failure, and requires a hydraulic pump and a hydraulic motor. On the contrary, the caliper sensor used in the present invention has a measurable range of 220 to 260 mm, a hydraulic anvil is unnecessary by using a spring of a mechanical method, and has an advantage of good operation and maintainability. As the caliper type sensor, a sensor having a rotation angle of 0 to 345 degrees and a precision of ± 0.1 mm can be used.

The roll alignment sensor is a sensor for measuring the alignment of the roll, and in the present invention, an inclinometer sensor or the like may be used. The sensor may compare the relative angle inclination between two adjacent rolls with an absolute value, and the measurement range may be ± 80 degrees and the precision may be within 0.01 degrees.

The signal conditioners 16 and 17 serve to amplify the detection signal of the sensor, and the junction boxes 18 and 19 serve as junction boxes.

The data logging unit 20 includes a radio frequency box (R / F box) 21, a wireless LAN box 22, a data logger 23, and a battery pack 24. ) And the like.

The radio frequency box 21 and the wireless LAN box 22 serve to transmit and receive measurement data and control signals wirelessly with the control unit 40. The transmission frequency may be 2.4 GHz, for example.

The data logger 23 serves to record data measured from the sensor units 10 and 11 and the like.

The battery pack 24 may be composed of one or more batteries for supplying power.

The auto joint unit 30 is coupled to the data logging unit 20 to charge a battery and transmit and receive data and control signals by wire, and may be composed of one or more auto joints 31 and 32. Auto joints (31, 32), when the dummy bar equipped with the roll check device main body is returned to its original position, it is automatically coupled and charged to the roll check device main body, it is possible to transmit data by wire when an error occurs in wireless communication.

The control unit 40 includes a wireless antenna 41, an access point 42, a network hub 43, a lamp / switch panel 44, a control panel The control board 45 may include a digital I / O module 46, a battery charger 47, a power supply 48, and the like.

Each component of the control unit 40 may be installed alone or in combination in the form of one or a plurality of panels. For example, the control unit 40 includes a wireless communication AP panel, an auto joint panel, a control panel, and the like. It acts as a joint control, data transmission and PLC signal relay.

The wireless antenna 41 and the access point 42 transmit and receive measurement data and control signals wirelessly with the radio frequency box 21 and the wireless LAN box 22 of the data logging unit 20.

The network hub 43 is wired to the auto joint unit 30, the access point 42, and the like, and serves to connect various devices.

The lamp / switch panel 44 is connected to the control panel 45 and includes various lamps and switches.

The control panel 45 is connected to the network hub 43, the lamp / switch panel 44, the digital I / O module 46, the battery charger 47, the power supply 48 and the like to control each device. .

The digital I / O module 46 uses each module such as an input system and an output system as one module, the battery charger 47 is used to charge the battery, and the power supply 48 is used to supply power. .

The computer unit 50 may be configured of a host computer 51, a printer 52, and the like.

The host computer 51 is connected to the network hub 43 through a protocol such as TCP / IP to control and monitor the measurement system, and to receive, store and analyze the measurement data, and transmit the measurement data to the server. Various software, such as a hazard monitoring program, a control program, and a data analysis program, can be provided.

The workstation unit 60 may be configured of a server 61, a power line communication (PLC) 62, a main power 63, and the like.

The server 61 is connected to the host computer 51 by a protocol such as TCP / IP and can inquire various data. As the server 61, a central control and monitoring system (CCMS) server may be used.

The PLC 62 is connected to the power line communication, and can receive and use various data.

3 illustrates a configuration of a dummy bar on which a roll checking device main body is mounted according to an embodiment of the present invention. It may be configured in the form of a panel including, the panel-like body (7a) may be mounted on the middle portion or the end of the dummy bar (7). However, it is also possible to separately mount the sensor units 10 and 11, the data logging unit 20, and the like on the dummy bar 7 without configuring the main body in the form of a panel. The sensor units 10 and 11 are provided on the roll checking device main body 7a in pairs on both the left and right sides, and are detachably installed for convenience of exchange.

3 shows a state in which the auto joint 30 is coupled to the roll check device main body 7a. The auto joint 30 is movable and can be automatically engaged with and released from the roll check device main body 7a. The remaining control unit 40, the computer unit 50, and the workstation unit 60, including the auto joint 30, are usually provided separately from the inspection apparatus main body 7a.

Fig. 4 schematically shows the configuration of a caliper type roll gap sensor used in accordance with an embodiment of the present invention, wherein the roll gap sensor 12 is in contact with the roll 5a of the strand and is variable in arc-shaped movable arm ( arm 12a, a fixed arm 12b in contact with the roll 5b in a fixed state, a displacement sensor 12c for detecting a roll gap measurement signal, and an electronic card 12d for calibration purposes, and the like. .

An example of an on-line inspection method using the above-described play equipment online inspection system is as follows.

First, prepare to move the dummy bar car (worker).

Next, disengage the auto joint (automatically).

Next, the data logger built in the roll check device is turned on by the dummy bar moving start signal (automatically).

Next, insert the dummy bar into the mold (worker).

Next, when the dummy bar passes through the strand, the roll gap is measured up to the third segment (automatically).

Next, after the insertion of the dummy bar is waited until the start of casting.

Next, when casting starts, roll intervals and the like are measured again, and are continuously measured from the fourth segment (automatically).

Next, measure the roll spacing, etc. until the dummy bar passes completely through the player (automatically).

Next, the dummy bar is collected by the dummy bar car (worker).

Next, when the dummy bar returns to its original position, the auto joint is engaged and charging starts (automatically).

Next, the roll state measurement data is transmitted to the host computer by the auto joint coupling signal (automatically).

Next, the received data is analyzed, archived and displayed on the screen (automatically).

Next, the analysis data is sent to the CCMS server (automatically).

As such, the inspection system according to the present invention is a fully automatic system that only inquires the measurement result without any operator intervention from the start of the roll state measurement to the completion, except for the operation of inserting and collecting the dummy bar into the mold during casting. .

The on-line inspection system according to the present invention has a roll state measurement function, a device holding / protection function, an automatic start / stop function, a battery holding function, a data sending / receiving function, a data analyzing function, a web inquiry function, and the like.

One of the roll state measurement functions of the strands is a function to determine how far the roll spacing state of the player strands is. The other of the strand state measurement functions is a function of determining the roll alignment state of the player strands. The roll gap sensor and the roll alignment sensor can be used to obtain roll condition check data.

The device maintenance / maintenance function is a sensor calibration function for the accuracy of strand measurement value and a sensor replacement function for durability maintenance and repair for continuous use. The required performance is the durability of the sensor, the convenience of sensor replacement (removal), the calibration (calibration), the sensor abnormality notification function, such as can extend the service life of the device and minimize the failure rate.

Figure 5 shows a calibration screen of the roll interval sensor, for this purpose it may be installed a drive means for varying the position of the roll sensor. In addition, an additional sensor for detecting an abnormality of the sensor may be installed.

The auto start / stop function functions from on-line roll checker operation to dummy data insertion, data transfer and battery charging after strand status measurement. Specifically, the roll check device is automatically operated when the dummy bar passes the mold, and the strand state diagnosis can be automated by automatically performing measurement data transfer and battery charging when the dummy bar is mounted on the dummy bar car.

The battery maintenance function is a power saving function for remaining battery consumption due to the operation of the roll check device and standby, and the remaining capacity display and charging function. In the related art, the battery was manually charged, the battery was consumed even during standby, and the battery remaining amount was not displayed during the measurement. In the present invention, it is possible to improve the service life of the inspection apparatus and reduce the failure rate by automatically charging the battery using the auto joint, providing a power saving function when the dummy bar is waiting, displaying the battery remaining amount, and providing an alarm function. .

6 illustrates an example of a control panel of an auto joint on a human machine interface (HMI) screen. The presence or absence of the auto joint may be checked and a charging state may be checked on the HMI screen, and the coupling and release of the auto joint may be controlled.

Figure 7 illustrates the roll check system status check function, it is possible to monitor the roll check device main body operation, auto joint coupling presence, battery charging status and the like.

Device protection function protects the roll check device in case of break-out and prevents foreign substances from entering the sensor. By protecting the sensors and equipment when breakouts occur and preventing the insertion of sealing chips into the sensors, the service life of the inspection apparatus can be improved and the failure rate can be reduced.

The data processing function collects and stores measurement data, and transmits and receives data to a host computer. The data processing function can increase speed by automating data processing.

The data analysis function is a function to search, analyze, and suggest solutions of measured data. In the past, only inquiry of measurement data was possible, and the facility manager set the improvement plan directly from the measured value and applied the same management standard. In the present invention, it is possible to add not only data inquiry, but also to add an analysis function, to automatically suggest an improvement plan based on the diagnosis result, and to set management criteria for each steel type, thereby improving the cast steel quality analysis ability due to equipment factors.

Figure 8 illustrates the roll interval (top) and the roll alignment state (bottom) through the data analysis software, Figure 9 is a comparison function with the previous measurement value (top), and the reference error level (bottom) ) Is an example.

10 illustrates an example of a web inquiry function, in which various data can be inquired from a CCMS server. In particular, the server may have a function of checking a measurement value graph and downloading the measurement value to an Excel file.

11 is a graph illustrating the operation performance of the on-line inspection system according to the present invention.

Table 1 compares the present invention and a conventional inspection system.

Invention Conventional When to measure In-line Off-line Measurement time required Unnecessary Separately required (45 minutes) Number of measurements 2 times / day or more 2 times / month Gap Measuring Range 220-260mm (wide range) 230 mm (limited) Start / Complete Measurement Auto start / stop Manual (operator intervention) Send and receive data Wireless and wired cable Battery charging Auto joint system Manual (Cable Connection) Gap sensor type Caliper (Potentiometer) Straight (VDT) Data lookup Web lookup (CCMS lookup) Dedicated program installation

The measured data according to the present invention can be used for daily strand equipment management, for example, it can be used to set the type of facility management criteria, determine whether the steel species input according to the strand equipment status every morning, thereby identifying the equipment status every day You can automatically publish and send reports.

In addition, measurement data can be used to investigate correlations with product (semi-finished) quality defects, for example cast quality (internal crack, center segregation, corner crack), hot rolled coil quality (edge scab, edge crack), cold rolled coil. It can be used in the product quality determination system that reflects the equipment condition regarding quality (edge scab defect), API material coil (HIC defect) and thick plate quality (UT defect).

In addition, the measurement data can be utilized for strand maintenance and replacement cycle setting, for example, maintenance and replacement position confirmation, segment maintenance, replacement criteria setting, and the like.

According to the present invention, the steel grade input decision according to the equipment condition can reduce out of order and media, minimize the quality evaluation of cast steel (S-print, E2 method, EPMA), quality inquiry considering the equipment condition The system can be implemented, the ability to produce high-grade steel production equipment, which is difficult to cast, can be increased, and the equipment status can be checked at any time by rapid diagnosis, and the separate equipment measurement time can be used as the maintenance time, and the equipment replacement and maintenance cycle Easy to set up

1: ladle 2: tundish
3: mold 4: strand
5: roll 6: cast
7: dummy bar 7a: roll inspection device main body
8: dummy bar car 10, 11: sensor unit
12, 13: roll gap sensor 12a: movable arm
12b: fixed arm 12c: displacement sensor
12d: electronic card 14, 15: roll alignment sensor
16, 17: signal conditioner 18, 19: junction box
20: data logging section 21: radio frequency box
22: WLAN Box 23: Data Logger
24: battery pack 30: auto joint portion
31, 32: auto joint 40: control unit
41: wireless antenna 42: access point
43: network hub 44: lamp / switch panel
45: control panel 46: digital I / O module
47: battery charger 48: power supply
50: computer unit 51: host computer
52: printer 60: workstation unit
61: server 62: PLC
63: main power

Claims (7)

Preparing a movement after loading a dummy bar equipped with a roll inspection device main body including a roll state check sensor, a battery, and a data logger on a dummy bar car;
Releasing the auto joint coupled to the roll checking device main body, and then operating the data logger in response to a moving start signal of the dummy bar car;
Inserting the dummy bar into the mold of the player, and measuring the roll state to some segment of the strand;
Inserting the dummy bar completely into the strand and initiating casting;
Continuously measuring the roll state of the strand until the dummy bar passes completely through the player;
Recovering the dummy bar with the dummy bar car, and then coupling and filling the auto joint with the roll checking device main body;
Transmitting the roll state measurement data wirelessly to the host computer by means of an auto joint coupling signal, and then storing and analyzing the measurement data; And
Transmitting the analyzed data to a server for viewing on the web;
Through the control panel connected to the roll check device main body and the software installed in the host computer, the roll check device main body is activated, the auto joint is engaged, the battery charge status is monitored, and the roll check device main unit is connected to the auto joint. Control automatically, search, compare, and transform measurement data,
The control panel connected to the roll check device and the software installed in the host computer have the functions of sensor calibration, sensor error notification, sensor protection, battery power saving, battery remaining alarm and data analysis. Way.
The method of claim 1,
A method for checking a continuous casting machine, characterized in that the roll state is checked online at every casting.
delete delete A sensor unit including a sensor measuring a gap and an alignment state of the rolls;
A data logging unit including a data logger for recording data measured by the sensor unit, a radio frequency box and a wireless LAN box for wirelessly transmitting and receiving measurement data and control signals, and a battery for supplying power;
An auto joint unit coupled to the data logging unit to charge a battery and to transmit and receive data and control signals by wire;
A control unit including a radio frequency box for wirelessly transmitting and receiving to and from the radio frequency box and the wireless LAN box of the data logging unit, an auto joint unit and a network hub connected by wire to the access point, and a control panel connected to the network hub;
A computer unit connected to the control unit and having a program to store and analyze measurement data and to control the control unit; And
It includes a workstation unit including a server connected to the computer unit,
Through the control panel connected to the roll check device main body and the software installed in the host computer, the roll check device main body is activated, the auto joint is engaged, the battery charge status is monitored, and the roll check device main unit is connected to the auto joint. Control automatically, search, compare, and transform measurement data,
The control panel connected to the roll check device and the software installed in the host computer have the functions of sensor calibration, sensor error notification, sensor protection, battery power saving, battery remaining alarm and data analysis. Device.
6. The method of claim 5,
An inspection apparatus main body including a sensor unit and a data logging unit, and the main body is mounted on a dummy bar.
The method according to claim 6,
The sensor unit includes a roll gap sensor and a roll alignment sensor detachably coupled to the inspection apparatus main body, wherein the roll gap sensor is a caliper type or a lever type with a potentiometer built in, and the roll alignment sensor is an inclinometer type. Foundry Equipment Inspection System.

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