KR20210093534A - Snout chute automatic control system for Zinc-plating processing facility - Google Patents

Abstract

The present invention relates to an automatic snout chute control system for galvanizing equipment and, more particularly, to an automatic snout chute control system for galvanizing equipment, which measures a plating liquid level in a plating port and automatically raises and lowers a snout chute in accordance with the plating liquid level. The automatic snout chute control system for galvanizing equipment comprises: a plating liquid level detector installed on one side of the plating port of the galvanizing equipment to measure a plating liquid level in the plating port, and generating a signal so that a snout chute is automatically raised and lowered in accordance with the plating liquid level; and a distributed control system formed on one side of the galvanizing equipment, and further including a program for receiving the level data measured from the plating liquid level detector and rotating a motor forward or reverse so that the snout chute is automatically raised and lowered.

Description

Snout chute automatic control system for Zinc-plating processing facility

The present invention relates to a device for automatically controlling a snout chute for a galvanizing facility, and in particular, an automatic snout chute for a galvanizing facility that measures the level of a plating solution in a plating port and automatically raises the snout chute according to the level of the plating solution. It is about the control device.

In general, steel mills use hot-dip galvanizing equipment (CGL) that produces high value-added galvanized steel sheets by plating the surface of the strip with hot-dip galvanizing or electrolytic cleaning of the surface of the strip to continuously electro-galvanize the strip. It is equipped with an Electrolytic Galvanizing Line (EGL) for plating.

As shown in FIG. 1 , the galvanizing equipment includes an annealing furnace 110 having an upper support roller 111 for a coil-shaped strip S, and the annealing furnace 110 . A snout chute 120 having a monitoring camera 121 inside the heat-treated strip S is sealed and moved, and the snout chute 120 passes through the lower part so that zinc plating is made. It has a support roller 131 and comprises a plating port 130 filled with a zinc plating solution.

Here, in the galvanizing treatment facility 100 , the snout chute 120 moves the lower end of the snout chute 120 up and down according to the level of the plating solution filled in the plating port 130 up and down. (down) It is formed in a structure that can be folded and unfolded, such as in the form of folds or in the form of an antenna.

And, on one side of the snout chute 120, if the plating solution inside the plating port 130 does not reach the proper level, manually down the snout chute 120, or the plating solution is higher than the proper level. In this case, the motor 140 for forward/reverse rotation as a control device for raising the snout chute 120 is formed.

In addition, since the monitoring camera 121 installed therein is exposed to high temperature on one side of the snout chute 120, a cooling means 150 for always supplying cooling air for cooling is formed.

However, in the conventional control device for galvanizing equipment as described above, the camera 121 installed inside the snout chute 120 in order to smoothly galvanize the surface of the strip S in the galvanizing port 130 . It is cumbersome as well as timely operation because the driver has to manually adjust the height while watching the CCTV 160 from time to time so that the lower surface of the mobile snout chute 120 comes to the upper level of the galvanized port 130. If not, the plating quality of the strip (S) is deteriorated or there is a problem such as a defect occurs.

In addition, after cleaning the glass formed on the front end of the camera 121 installed for monitoring the inside of the snout chute 120, the air manual valve 151 for cooling must be opened, but sometimes the air manual valve 151 is not opened. There is a problem in that the camera 121 is damaged due to overheating.

Patent Publication No. 10-2016-0003053

Accordingly, the present invention has been devised to solve the above problems, and an object of the present invention is to improve the plating quality of the strip by automatically turning the snout chute up/down according to the plating solution level (water level) in the zinc plating pot. The goal is to provide an automatic control device for snout chute for galvanizing equipment.

In order to achieve the above object, the present invention includes an annealing furnace having an upper support roller for supporting a coil-shaped strip, and a camera for monitoring inside/outside where the heat-treated strip is sealed and moved through the annealing furnace At the same time, a snout chute formed in a structure that can be folded and unfolded such as a wrinkle shape or an antenna shape, a plating port filled with a zinc plating solution having a lower support roller to perform zinc plating through the snout chute; It is formed on one side of the naout chute and is cooled by a motor for forward/reverse rotation that lowers or UP the snout chute according to the level of the plating solution, and a monitoring camera installed inside the snout chute. An automatic control device for a snout chute for a galvanizing treatment facility including a cooling air supply pipe having a valve that can be opened and closed to supply air, and is installed on one side of the plating port to measure the level of the plating solution in the plating port and measure the level of the plating solution. a plating liquid level detector that generates a signal to automatically up-down the snout suit according to the present invention; It is formed on one side of the galvanizing facility and receives the level data measured from the plating solution level detector, and adds a program to rotate the motor forward or reverse to automatically UP or DOWN the snout suit. Distributed control system constituting; It is characterized in that it includes.

In addition, the present invention relates to a snout chute automatic control device for a galvanizing treatment facility, wherein the plating liquid level detector uses a laser sensor to measure the level of the plating liquid by irradiating a laser or uses the characteristics of ultrasonic waves or generates ultrasonic waves It is characterized in that it is composed of an ultrasonic sensor (ultrasonic sensor) for measuring the level of the plating solution.

In addition, the present invention is a snout chute automatic control device for a galvanizing treatment facility, wherein the distributed control system includes an Input/Output panel for processing input and output electrical signals, a Human Machine Interface (HMI), and a Closed Circuit Television (CCTV) It is characterized in that it comprises a.

In addition, the present invention is characterized in that in the automatic control device for snout chute for galvanizing equipment, a valve opening/closing detection unit is further provided on one side of the valve of the cooling air supply pipe.

In addition, the present invention is characterized in that in the automatic control device for snout chute for galvanizing equipment, the valve opening/closing detection unit is composed of a limit switch or a proximity sensor.

In addition, the present invention further provides a galvanizing equipment having the automatic snout chute control device.

The present invention as described above has the effect of improving the plating quality of the strip by automatically adjusting the height of the snout suit.

In addition, the present invention has an effect of preventing damage due to overheating of the camera caused by not opening the manual air valve by immediately checking whether the manual air valve for cooling (not shown) formed at the front end of the camera is opened or closed.

1 is a view schematically showing a conventional galvanizing treatment facility.
2 is a view schematically showing a snout chute automatic control device for a galvanizing treatment facility according to a preferred embodiment of the present invention.
3 is a state diagram of the operation state of the automatic snout suit control device according to the present invention when the plating liquid level is greater than a reference value.
4 is a state diagram of the operation state of the automatic snout suit control device according to the present invention when the plating liquid level is less than the reference value.

Hereinafter, a preferred embodiment according to the present invention will be described in more detail based on the accompanying drawings.

Here, components having the same function in all the drawings below are omitted from repetitive descriptions using the same reference numerals, and the terms to be described later are defined in consideration of the functions in the present invention, which have their own and commonly used meanings. should be interpreted as

As shown in FIG. 2 , the snout chute control device 200 for a galvanizing treatment facility according to the present invention is largely divided into a plating solution level detector 210 and a distributed control system 220 .

That is, the snout chute control apparatus 200 including the plating liquid level detector 210 and the distributed control system 220 according to the present invention is the plating port 330 of the galvanizing equipment 300 . ) to automatically control the UP operation and the DOWN operation of the snout chute 320 according to the level of the plating solution filled in the .

To this end, the galvanizing equipment 300 according to the present invention includes an annealing furnace 310 having an upper support roller 311 supporting a coil-shaped strip S, and the annealing furnace 310 . ) through which the heat-treated strip (S) is sealed and moved inside/outside with a monitoring camera 321, and at the same time, a snout suit formed in a foldable and expandable structure such as a wrinkle shape or an antenna shape chute) 320 and a plating port 330 having a lower support roller 331 so that zinc plating is performed through the snout chute 320 .

In addition, on one side of the snout chute 320, the plating solution inside the plating port 330 moves the snout chute 320 down (DOWN) or up (UP) according to the level of the forward and reverse rotation operation. A motor 340 is formed.

In addition, a cooling air supply pipe 350 having a valve 351 that can be opened and closed so as to supply cooling air to the monitoring camera 321 installed therein is formed on one side of the snout chute 320 .

The plating liquid level detector 210 of the snout chute control device 200 according to the present invention is installed on one side of the upper side of the plating port 330 of the galvanizing equipment 300 .

In addition, the distributed control system 220 is installed at intervals on one side of the galvanizing equipment 300 .

Specifically, the plating liquid level detector 210 is formed on one side of the upper side of the plating port 330 to measure the plating liquid level, and a laser sensor that measures the plating liquid level by irradiating a laser or ultrasonic characteristics Preferably, it is composed of an ultrasonic sensor that measures the level of the plating solution by using or generating ultrasonic waves.

Here, “level” refers to the level of the plating solution filled in the plating port 330 .

In addition, the plating liquid level detector 210 has a precise measurement level when the distance from the plating liquid surface (to be more specific, it means the surface at which the level is measured, which is referred to as a 'level measurement surface') is about 1 mm or more. (For example, a resolution of 05 mm or less) is used. This is to secure the level of precision required in the continuous hot-dip plating line.

In addition, the plating liquid level detector 210 is electrically connected to transmit the measured (detected) level data of the plating liquid as an output signal to the distributed control system 220 .

That is, when the level of the plating liquid is measured (detected) through the plating liquid level detector 210 , the level data is output to be transmitted to the distributed control system 220 .

Here, the noise of the level data output from the plating solution level detector 210 is removed by a signal conditioner (not shown).

Then, the analog-to-digital conversion of the level data after the noise is removed is performed, and this role is played by an AD converter (not shown).

The distributed control system 220 is formed on one side of the galvanizing treatment facility 300 and receives the level data measured from the plating solution level detector 210 to automatically raise the snout chute 320 . ) or DOWN, the program is additionally configured to rotate the motor forward or reverse.

Here, the distributed control system 220 stores the scattering peak filtering program in the form of software. The filtering steps according to these pre-stored programs will be briefly described.

First, a digital filtering step in which noise of the level data converted into digitization in the AD converter is removed is performed.

Subsequently, a change of more than the reference value among the digitally filtered level data is cut off, and a step up/down process is performed to place a variable following the detected level data in the program, and abrupt A signal processing step corresponding to the signal change is performed.

Through such a filtering step, it is possible to obtain accurate plating solution level data in which the scattering peak is filtered.

In addition, the distributed control system 220 is located on one side and is remotely controlled, and the forward and reverse rotation operation of the plating solution level detector 210 and the snout chute 320 down or up. It is electrically connected to the motor 340 to process input and output electrical signals, an Input/Output panel 221 , a Human Machine Interface (HMI) 222 and a Closed Circuit Television (CCTV) 223 .

Here, the human machine interface (HMI) 222 is the distributed processing of the digital world of human analog perception and computer or communication related to the vision or hearing of the driver who operates the galvanizing processing facility 300 . It is an interface for connecting the control system 220 .

In addition, the present invention is a limit switch on one side of the valve 351 that can be opened and closed so as to supply cooling air for cooling the monitoring camera 321 installed inside the snout chute 320 of the galvanizing treatment facility 300 . Alternatively, a valve opening/closing detection unit 230 made of a proximity sensor is further provided.

Here, the valve 351 of the cooling air supply pipe 350 is closed to stop the supply of cooling air when cleaning the glass located at the front end of the monitoring camera 321 installed inside the snout chute 320 .

And, after the cleaning of the glass positioned at the front end of the monitoring camera 321 is completed, the valve 351 must be opened so that the cooling air cools the monitoring camera 321 again.

However, if the operator forgets this and does not open the valve 351 , cooling air is not supplied and the monitoring camera 321 is damaged due to overheating.

In order to prevent this, the valve opening/closing detection unit 230 according to the present invention checks whether the valve 351 of the cooling air supply pipe 350 that supplies cooling air to the monitoring camera 321 is open or closed and sends an open/close position signal. It is transmitted to the Input/Output panel 221 of the distributed control system 220 and is electrically connected so that the operator of the galvanizing treatment facility 300 can check it on the HMI 222 screen and monitor it locally.

In addition, the valve opening/closing detection unit 230 is preferably installed in the opening/closing part of the handle (not shown) of the valve 351 so as to know the open position and the closed position of the valve 351 of the cooling air supply pipe 350 . do.

Accordingly, when the handle of the valve 351 is in the open or closed position, the valve open/close detection unit 230 transmits the open/close position signal of the valve 351 to the Input/Output panel 221 to be galvanized. The operator of the facility 300 can immediately check and respond on the screen of the HMI 222 .

On the other hand, the present invention may further provide a galvanizing treatment facility 300 having the snout chute control device 200 .

The operational relationship of the present invention configured as described above will be described as follows.

First, when galvanizing the strip through the zinc plating facility provided with the snout chute control device according to the present invention, the strip S is monitored through the upper support roller 311 of the annealing furnace 310 . The plating process is performed while moving in the vertical direction along the lower support roller 331 in the plating port 330 filled with zinc plating solution through a snout chute 320 having a camera 321 for use.

At this time, the plating liquid level detector 210 of the snout chute control device 200 measures (detects) the plating liquid level in the plating port 330 and uses the measured level data of the plating liquid as an output signal. The distributed control system 220 send to

[Operation of snout chute control device when plating solution level is higher than the standard value]

And, as shown in FIG. 3 , when the plating solution level measured by the plating solution level detector 210 is greater than (or greater than) the reference value, the plating solution level detector 210 outputs the level data of the measured (detected) plating solution. The signal is transmitted to the distributed control system 220 .

At the same time, the distributed control system 220 transmits a signal to, for example, reversely rotate the motor 340 through an Input/Output panel 221 that processes input/output electrical signals.

Accordingly, as the motor 340 rotates in reverse, a folding operation is made by a structure that can be folded and unfolded, such as a wrinkle shape or an antenna shape of the snout chute 320 interlocking therewith, so that the length is reduced and the snout The lower end of the chute 320 is up (UP) in the plating port 330 .

Therefore, the lower surface of the snout chute 320 is located at the upper level of the plating solution in the plating port 330 so that the plating process is performed smoothly.

[Operation of snout chute control device when plating solution level is less than standard value]

Conversely, as shown in FIG. 4 , when the plating liquid level measured by the plating liquid level detector 210 is less than (or less than) the reference value, the plating liquid level detector 210 outputs the level data of the measured (detected) plating liquid. The signal is transmitted to the distributed control system 220 .

At the same time, the distributed control system 220 transmits, for example, a signal to rotate the motor 340 forward through the Input/Output panel 221 that processes input and output electrical signals.

Accordingly, as the motor 340 rotates forward, an unfolding operation is made by a structure that can be folded and unfolded, such as a wrinkle shape or an antenna shape of the snout chute 320 interlocking therewith, and the length is increased while the snout suit is extended. The lower end of the 320 is down (DOWN) in the plating port (330).

Therefore, the lower surface of the snout chute 320 is located at the upper level of the plating solution in the plating port 330 so that the plating process is performed smoothly.

In addition, the present invention provides cooling air for cooling the monitoring camera 321 installed inside the snout chute 320 by the valve opening/closing detection unit 230 when the galvanizing facility 300 is operated. Detects whether the open/closeable valve 351 is opened or closed.

That is, the valve opening/closing detection unit 230 according to the present invention checks whether the valve 351 of the cooling air supply pipe 350 that supplies the cooling air to the monitoring camera 321 is opened or closed and distributes the open/close position signal. It is transmitted to the Input/Output panel 221 of the control system 220 so that the operator of the galvanizing treatment facility 300 can immediately check and respond on the HMI 222 screen.

Therefore, in the present invention, by continuously repeating such an operation, the up and down operations of the snout chute are automatically performed according to the plating liquid level inside the plating pot, thereby removing the metal dross generated inside the snout. The plating condition of the strip surface can be improved by maintaining the proper position to overflow to the top of the chute.

In addition, it is possible to prevent damage to the camera due to overheating by checking whether the valve of the cooling air supply pipe is open or closed so that cooling air is always supplied to the camera.

The present invention described above is not limited by the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes to other equivalent embodiments are possible without departing from the technical spirit of the present invention. It will be apparent to those of ordinary skill in the art to which the present invention pertains.

200: Snout chute control device for galvanizing equipment
210: plating liquid level detector
220: distributed control system (distributed control system)
221 : Input/Output panel
222: HMI (Human Machine Interface)
223 : CCTV (Closed Circuit Television)
300: galvanizing treatment equipment 310: annealing furnace
311: upper support roller 320: snout chute (Snout chute)
321: surveillance camera 330: plating port
331: lower support roller 340: motor
350: cooling air supply pipe 351: valve
S: strip

Claims (6)

An annealing furnace having an upper support roller for supporting a coil-shaped strip, and an internal/external monitoring camera in which the heat-treated strip is sealed and moved through the annealing furnace, as well as a wrinkle-shaped or antenna-type A snout chute formed in a structure that can be folded and unfolded, a plating port filled with zinc plating solution having a lower support roller so that zinc plating is performed through the snout chute; Equipped with a motor that operates forward and reverse rotation to turn the snout chute down or up according to the requirement, and a valve that can be opened and closed to supply cooling air to the monitoring camera installed inside the snout chute. As a snout chute automatic control device for galvanizing equipment including a cooling air supply pipe to
a plating liquid level detector installed at one side of the plating port to measure the plating liquid level in the plating port and to generate a signal to automatically turn the snout chute up and down according to the plating liquid level;
It is formed on one side of the galvanizing facility and receives the level data measured from the plating solution level detector, and adds a program to rotate the motor forward or reverse to automatically UP or DOWN the snout suit. Distributed control system constituting; Snout chute automatic control device for galvanizing processing equipment, characterized in that it comprises a. According to claim 1,
The plating liquid level detector is composed of a laser sensor that measures the level of the plating liquid by irradiating a laser or an ultrasonic sensor that measures the level of the plating liquid by using the characteristics of ultrasonic waves or generating ultrasonic waves Automatic control device for snout chute for galvanizing equipment. According to claim 1,
The distributed control system includes an Input/Output panel for processing input and output electrical signals, a Human Machine Interface (HMI), and a Closed Circuit Television (CCTV) automatic control device for galvanizing equipment. . According to claim 1,
A snout chute automatic control device for a zinc plating treatment facility, characterized in that a valve opening/closing detection unit is further provided on one side of the valve of the cooling air supply pipe. 5. The method of claim 4,
The automatic control device for a snout chute for a galvanizing treatment facility, characterized in that the valve opening/closing detection unit comprises a limit switch or a proximity sensor. The galvanizing treatment facility provided with the automatic snout chute control apparatus in any one of Claims 1-4.

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