KR20230060878A - Snout Control System and hot-dip galvanizing equipment including the same - Google Patents

Abstract

The present invention relates to a snout control system and a hot-dip galvanizing facility including the same, capable of increasing the lifespan of a pump unit. The snout control system comprises: a snout device for introducing a steel sheet into a plating bath; and a control unit for controlling the snout device.

Description

Snout control system and hot-dip galvanizing equipment including the same {Snout Control System and hot-dip galvanizing equipment including the same}

The present invention relates to a snout control system and a hot-dip galvanizing facility including the same, and more particularly, to a snout control capable of automatically removing dross floating in a snout device during a production process of a hot-dip galvanized steel sheet. It relates to a system and a hot-dip galvanizing facility including the same.

The hot-dip galvanizing facility is a molten metal facility that coats a zinc film on the surface of a high-temperature steel plate by melting zinc ingot in a molten state at a temperature of 450 degrees or higher. Such hot-dip galvanizing equipment, due to thermal and chemical instability such as zinc oxidation due to contact with the discharge wiping air of the air knife flowing to the molten metal surface after collision with the surface of the vertical strip and the temperature difference with the outside air, Dross of the Fe ₂ Al structure is always generated. In particular, as various alloy elements such as aluminum, manganese, and silicon are added to enhance corrosion resistance and improve surface quality of plated steel sheets, the amount of dross generated by external factors (temperature difference, oxidation due to wiping gas contact, etc.) greatly increases. do.

Such dross may be adsorbed on the surface of the steel sheet and cause various problems such as processing cracks, peeling of plating, and deterioration of paintability during secondary processing. In particular, in order for the coated steel sheet to be supplied for the exterior of automobiles, the management of such dross must be more strictly managed. Many steel companies minimize the generation of dross by securing thermal and chemical stability of the galvanizing bath to suppress dross defects, and install a dam structure facility inside the snout that introduces the steel sheet by immersing one end in the galvanizing bath. Many studies have been conducted from the point of view of emission management, such as preventing foreign matter such as dross from being adsorbed on the steel sheet by introducing the steel sheet.

In general, many steel companies use a dam-type structure and a metal pump facility inside the snorkel part of the snout device to remove the dross floating in the snout device, and transfer the dross that has flowed over the dam to the back of the galvanizing tank. The snout control system of the method of discharging is used.

However, in the conventional snout control system and the hot-dip galvanizing facility including the same, the level of the galvanizing tank during operation is too high to fill the dam, or the level is too low to discharge foreign substances such as dross out of the dam. As the case frequently occurs, there is a problem in that foreign matter adheres to the steel sheet and causes defects. In addition, due to this problem, workers have to manually check and manage the dam management status inside the snout device from time to time, unless the operator watches the dam management inside the snout device in real time according to the real-time molten metal level change in the galvanizing tank. There was a problem in that it was difficult to respond to dross management.

The present invention is to solve various problems, including the above problems, a sensor capable of detecting a foreign substance floating on the molten surface inside the snorkel part of the snorkel unit and a dam unit. Can detect the water level of the molten surface inside and outside To provide a snout control system that can secure operational convenience and quality stability by automatically controlling the dam management inside the snout device by using a sensor located in the snout device to improve the above-mentioned problems, and to provide a hot-dip galvanizing facility including the same to be However, these tasks are illustrative, and the scope of the present invention is not limited thereby.

According to one embodiment of the present invention, a snout control system is provided. The snout control system includes: a snout device for introducing the steel sheet into the plating bath by immersing one end in a plating bath containing a hot-dip galvanizing solution for plating the steel sheet during the production process of the hot-dip galvanized steel sheet; and a control unit controlling the snout device, wherein the snout device is formed to surround the steel plate flowing into the plating bath, and through an opening formed at a lower end immersed in the molten metal surface of the plating bath, the steel sheet a snorkel unit for guiding the introduction into the molten zinc plating solution accommodated in the plating bath; In the opening part of the snorkel part, a dam wall part formed along the inner circumference of the snorkel part so as to be spaced apart from the inner wall part of the snorkel part by a predetermined distance and protrude at a predetermined height in the height direction of the snorkel part, and the inner wall part of the snorkel part and a dam unit forming an accommodation space between the dam wall portions to accommodate the molten zinc plating solution flowing through the opening and then overflowing the dam wall portion; a pump unit installed outside the snorkel unit to pump the molten zinc plating solution accommodated in the accommodation space of the dam unit into the plating bath; a first sensor installed on one side of the inner space of the snorkel part and detecting a foreign object floating on the molten surface of the molten zinc plating solution and approaching the steel sheet; and a first water level of the molten zinc plating liquid molten surface which is installed on the other side of the inner space of the snorkel part and flows into the opening and overflows the dam wall portion and is accommodated in the receiving space of the dam unit. 2 A second sensor for measuring the water level; may be included.

According to an embodiment of the present invention, the controller receives sensing signals from the first sensor and the second sensor, and adjusts the immersed depth of the snorkel unit in the plating bath according to the sensing signals. The load of the pump unit may be adjusted to raise or lower, or to control the flow rate of the molten zinc plating solution pumped by the pump unit.

According to an embodiment of the present invention, the control unit, when it is detected through the first sensor that the foreign matter is approaching the steel plate, lowers the snorkel unit to increase the depth at which the lower end of the snorkel unit is immersed in the plating bath. can make it

According to one embodiment of the present invention, the control unit compares the water level difference between the first water level of the opening part detected through the second sensor and the second water level of the accommodation space of the dam unit, and As the difference becomes smaller, the load of the pump unit may be increased.

According to an embodiment of the present invention, the control unit, when the second water level of the dam unit is lower than a preset reference water level, lowers the snorkel unit to increase the depth at which the lower end of the snorkel unit is immersed in the plating tank , When the second water level is higher than the reference water level, the snorkel part is raised so that the lower end of the snorkel part is immersed in the plating tank.

According to an embodiment of the present invention, the first sensor may be a vision sensor that detects the foreign matter floating on the molten surface of the molten zinc plating solution using a camera image sensor.

According to an embodiment of the present invention, the second sensor uses a camera image sensor to measure the first water level of the molten zinc plating solution flowing into the opening and the dam wall of the dam unit to the accommodation space by using a camera image sensor. It may be a vision sensor that measures the second water level of the molten surface of the molten zinc plating solution accommodated.

According to an embodiment of the present invention, the second sensor uses any one of an ultrasonic sensor, an infrared sensor, and a radar sensor to measure the first water level of the molten zinc plating solution flowing into the opening and the dam unit. It may be a non-contact sensor that measures the second water level of the molten zinc plating solution bath surface that overflows the dam wall and is accommodated in the accommodation space.

According to one embodiment of the present invention, the pump unit is installed at a position corresponding to the dam unit on the outside of the snorkel unit, and the pumping space inside is connected to communicate with the accommodation space of the dam unit, and the accommodation a housing portion having a discharge port formed at one side to discharge the molten zinc plating solution introduced into the pumping space from the space into the plating bath; an impeller part rotatably installed in the pumping space of the housing part to flow the molten zinc plating solution introduced into the pumping space by a rotational drive toward the outlet; and a drive motor installed on one side of the housing unit and connected to a rotating shaft of the impeller unit to rotate and drive the impeller unit.

According to another embodiment of the present invention, a hot-dip galvanizing facility is provided. The hot-dip galvanizing equipment includes a plating bath in which a hot-dip galvanizing solution is accommodated; a snout control system having one side connected to a heating facility and the other side immersed in the molten surface of the plating bath to introduce the steel sheet heat-treated in the heating facility into the plating bath; and an air knife installed above the plating bath to adjust the thickness of the molten zinc adhered to the steel sheet passing through the plating bath.

According to one embodiment of the present invention made as described above, by recognizing the flow of foreign substances near the dam unit inside the snorkel part of the snout device and the water level difference between the inside and outside of the dam unit through the sensor, When foreign substances approach the steel plate, the snorkel part of the snout device is raised or lowered to automatically control the depth at which the lower end of the snorkel part is immersed in the plating tank to suppress foreign matter from being mixed into the steel plate, and the water level difference between the inside and outside of the dam unit Accordingly, by automatically adjusting the load of the pump unit to maintain an appropriate load, it is possible to easily discharge foreign substances floating in the snorkel unit and increase the lifespan of the pump unit.

In this way, by utilizing a sensor capable of detecting foreign matter floating on the water surface inside the snorkel part of the snout device and a sensor capable of detecting the water level of the water surface inside and outside the dam unit, automatic control of the dam management inside the snout device By doing so, it is possible to implement a snout control system and a hot-dip galvanizing facility including the snout control system that can have the effect of securing operational convenience and quality stability. Of course, the scope of the present invention is not limited by these effects.

1 is a process chart schematically showing a manufacturing process of a hot-dip galvanized steel sheet according to an embodiment of the present invention.
FIG. 2 is a perspective view schematically illustrating a hot-dip galvanizing facility in the manufacturing process of the hot-dip galvanized steel sheet of FIG. 1 .
3 and 4 are cross-sectional views schematically showing side and front views of the snout control system installed in the hot-dip galvanizing facility of FIG. 2 .
Figure 5 is a perspective view schematically showing the inside of the snorkel unit of the snout device of Figure 4;

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

The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art, and the following examples may be modified in many different forms, and the scope of the present invention is as follows It is not limited to the examples. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the spirit of the invention to those skilled in the art. In addition, the thickness or size of each layer in the drawings is exaggerated for convenience and clarity of explanation.

Hereinafter, embodiments of the present invention will be described with reference to drawings schematically showing ideal embodiments of the present invention. In the drawings, variations of the depicted shape may be expected, depending on, for example, manufacturing techniques and/or tolerances. Therefore, embodiments of the inventive concept should not be construed as being limited to the specific shape of the region shown in this specification, but should include, for example, a change in shape caused by manufacturing.

1 is a process diagram schematically showing a manufacturing process 1000 of a hot-dip galvanized steel sheet according to an embodiment of the present invention, and FIG. 2 is a hot-dip galvanizing facility in the manufacturing process 1000 of a hot-dip galvanized steel sheet of FIG. It is a perspective view schematically showing. 3 and 4 are cross-sectional views schematically showing side and front views of the snout control system including the snout device 100 and the controller 200 installed in the hot-dip galvanizing facility of FIG. 2, and FIG. It is a perspective view schematically showing the inside of the snorkel part 110 of the snout device 100 of Fig. 4.

First, as shown in FIG. 1 , the equipment for manufacturing a hot-dip galvanized steel sheet according to an embodiment of the present invention includes a welding facility 600, a heating facility 700, and a rolling facility 800. ), a post-processing facility 900, a plating bath 300, a snout device 100, a control unit 200 for controlling the same, and an air knife 500.

As shown in FIG. 1, after cold rolling or hot rolling, the coiled steel sheet 1 is mounted on the payoff reel C1, and welding between the preceding and following steel sheets 1 is completed through a welding facility 600. In addition, heat treatment may be performed in a heating facility 700 to secure desired material strength and coating adhesion during hot-dip galvanizing of the steel sheet 1.

Subsequently, the steel sheet 1 after the heat treatment may be introduced into the plating bath 300 of the hot-dip galvanizing facility while being maintained at an appropriate temperature for the hot-dip galvanizing process. At this time, in order to prevent oxidation of the surface of the steel sheet 1 caused by exposure of the steel sheet 1 heat-treated at a high temperature and the plating peeling phenomenon caused by the exposure to the atmosphere, the snout device 100, which is a steel sheet induction facility, is introduced. can

More specifically, in the snout device 100, one side is connected to the heating facility 700 and the other side is immersed in the bath surface of the plating bath 300, and the steel sheet 1 heat-treated in the heating facility 700 is molten zinc The plating solution 2 may be introduced into the plating bath 300 accommodated therein. The inside of the snout device 100 may be filled with an inert gas (NHx) to prevent peeling of plating due to oxidation of the surface of the steel plate 1 .

Subsequently, the steel sheet 1 passing through the snout device 100 is subjected to hot-dip galvanization in the plating bath 300 in which the hot-dip galvanizing solution 2 is accommodated, and then installed above the plating bath 300 to make the steel sheet ( 1) The coating amount can be adjusted to a preset thickness by the air knife 500 that controls the thickness of the molten zinc attached to the plate.

In this way, the plated steel sheet 1 can be manufactured with a beautiful surface through temper rolling in the rolling facility 800, and then post-processing including a shape corrector and a post-processing to secure corrosion resistance and a cutting machine. It can be finalized by being wound around the tension reel C2 through the facility 900.

If the hot-dip galvanizing facility in the manufacturing process of the hot-dip galvanized steel sheet is described in more detail, as shown in FIGS. 2 to 4, it is connected to the heating facility 700 and one end is connected to the plating bath 300. The steel sheet 1 is introduced into the plating bath 300 in which the hot-dip galvanizing solution 2 is accommodated by the snout device 100 immersed in the bath surface of the received hot-dip galvanizing solution 2 and the control unit 200 controlling the same It can be.

In addition, the steel sheet 1 is formed by the sink roll (R1) immersed in the plating bath 300 and the stabilizing roll (R2) installed directly above the pass line of the plating bath ( 300), it can be continuously transferred while being vertically changed. Through this process, the hot-dip galvanizing solution 2 accommodated in the plating bath 300 may adhere to the surface of the steel sheet 1 .

Thereafter, the steel sheet 1 passing through the sink roll R1 is corrected for warpage while passing between a pair of stabilizing rolls R2 installed directly above it, and passes through the air knife 500 to The amount of surface adhesion can be controlled.

As shown in FIGS. 2 to 4, in such a hot-dip galvanizing facility, the snout device 100 largely includes a snorkel unit 110, a dam unit 120, and a pump unit 130 And, it includes the first sensor 140 and the second sensor 150, and can be controlled by the control unit 200 interworking with the first sensor 140 and the second sensor 150.

The snout device 100 is formed to surround the steel plate 1 and fills the inner space A3 with inert gas (NHx), so that the steel plate 1 heat-treated at a high temperature in the heating facility 700 is exposed to the atmosphere surface oxidation can be prevented. In addition, it has a structure for preventing surface defects from occurring due to ash formed by condensation of the vapor of the hot-dip galvanizing solution 2 contained in the plating bath 300, which is attached to the surface of the steel sheet 1 as a foreign substance. can

A snorkel unit 110 partially immersed in the molten surface of the hot-dip galvanizing solution 2 accommodated in the plating bath 300 may be installed on the lower side of the snout device 100 . More specifically, the snorkel part 110 is formed to surround the steel plate 1 introduced into the plating bath 300, and through the opening 111 formed at the lower end immersed in the bath surface of the plating bath 300, the steel plate (1) may be introduced into the hot-dip galvanizing solution 2 accommodated in the plating bath 300.

For example, the snorkel unit 110 may be formed in a square tube shape having a square cross section and coupled to the lower end of the snout device 100 formed in the same square tube shape. In addition, although not shown, the snorkel unit 110 is driven up and down based on the molten surface of the plating bath 300 by a driving device such as an actuator so that the depth at which the lower end is immersed in the plating bath 300 can be adjusted It can be.

In addition, as shown in FIGS. 3 to 5, the dam unit 120 is spaced apart from the inner wall portion 112 of the snorkel portion 110 by a predetermined distance in the open portion 111 of the snorkel portion 110, and snorkel Including the dam wall portion 121 formed along the inner circumference of the snorkel portion 110 so as to protrude to a predetermined height in the height direction of the portion 110, the inner wall portion 112 and the dam wall portion 121 of the snorkel portion 110 ), an accommodation space A1 capable of accommodating the hot-dip galvanizing solution 2 flowing through the opening 111 and then overflowing the dam wall 121 may be formed.

For example, the dam unit 120 may be integrally formed with the snorkel part 110 by bending and molding the end of the snorkel part 110, or may be manufactured separately and coupled to the opening 111 of the snorkel part 110. . The upper end of the dam wall portion 121 of the dam unit 120 is molten zinc introduced through the opening 111 of the snorkel portion 110 in a state where the snorkel portion 110 is immersed in the plating bath 300 The height of the molten metal surface of the plating liquid 2 may match or be formed at a relatively low position. Accordingly, when the lower end of the snorkel part 110 is immersed in the plating bath 300, the molten zinc plating solution 2 introduced through the open part 111 of the snorkel part 110 overflows the dam wall part 121. It can be accommodated in the accommodation space A1 of the dam unit 120.

In addition, the pump unit 130 is installed outside the snorkel unit 110 to pump and discharge the molten zinc plating solution 2 accommodated in the accommodation space A1 of the dam unit 120 into the plating bath 300. can

More specifically, the pump unit 130 is installed outside the snorkel unit 110 at a position corresponding to the dam unit 120, so that the pumping space A2 inside the dam unit 120 accommodates the space A1 ) and a housing in which a discharge port 131a is formed on one side to discharge the molten zinc plating solution 2 introduced into the pumping space A2 from the accommodation space A1 into the plating bath 300. It is rotatably installed in the part 131 and the pumping space A2 of the housing part 131, and the hot-dip galvanizing solution 2 introduced into the pumping space A2 by rotation is driven toward the outlet 131a. It is installed on one side of the housing part 131 by the bracket (B) installed on the side of the impeller part 132 and the snorkel part 110 for flow, and the rotating shaft 133a is the rotating shaft 132a of the impeller part 132 It may include a driving motor 133 connected to and rotationally driving the impeller unit 132 .

The pump unit 130 flows in through the opening 111 of the snorkel part 110 and then overflows the dam wall part 121 and is accommodated in the accommodation space A1 of the dam unit 120 ( 2) is discharged to the molten surface of the plating bath 300 outside the snorkel unit 110, so that the molten zinc plating solution 2 in the plating bath 300 continuously passes through the opening 111 of the snorkel unit 110. can be induced to enter.

In this way, the molten zinc plating solution 2 accommodated in the accommodation space A1 of the dam unit 120 is discharged to the bath surface side of the plating bath 300 outside the snorkel unit 110 by the pump unit 130, thereby melting the By inducing the foreign matter D, such as dross, included in the galvanizing solution 2 to float on the molten surface of the plating bath 300, the foreign matter D is separated from the hot-dip galvanizing solution 2 in the plating bath 300. It is possible to prevent re-contamination of the hot-dip galvanizing solution 2 by being mixed, or re-inflow through the opening 111 of the snorkel part 110 where the lower end is immersed under the molten metal surface of the plating bath 300.

At this time, foreign matter D such as dross discharged to the molten surface of the plating bath 300 by the pump unit 130 and floating on the molten surface of the plating bath 300 is removed from the plating bath 300 by a separate removal device. ), or can be removed by an operator.

In addition, the shape of the pump unit 130 is not necessarily limited to those of FIGS. 3 to 5, and the molten zinc plating solution 2 accommodated in the accommodation space A1 of the dam unit 120 is plated on the outside of the snorkel part 110. Various forms that can be discharged to the molten surface side of the bath 300 can be applied.

As shown in FIGS. 4 and 5, the first sensor 140 is installed on one side of the inner space of the snorkel part 110, and melt introduced into the snorkel part 110 through the opening 111. A foreign substance (D) floating on the molten surface of the galvanizing solution (2) and approaching the steel sheet (1) is detected, and the second sensor (150) is installed on the other side of the inner space of the snorkel part (110) and opens The first water level of the molten surface of the molten zinc plating solution 2 flowing into the unit 111 and the first water level of the molten surface of the molten zinc plating solution 2 overflowing the dam wall portion 121 and accommodated in the receiving space A1 of the dam unit 120 2 levels can be measured.

The first sensor 140 may be a vision sensor that detects the foreign material D floating on the molten surface of the hot-dip galvanizing solution 2 by using a camera image sensor.

In addition, the second sensor 150 also uses a camera image sensor to detect the first water level of the molten surface of the molten zinc plating solution 2 flowing into the opening 111 and the dam wall portion 121 of the dam unit 120 by using a camera image sensor. It may be a vision sensor that measures the second water level of the molten surface of the hot-dip galvanizing solution 2 accommodated in the overflow receiving space A1. However, the second sensor 150 is not necessarily limited to a vision sensor, and uses any one of an ultrasonic sensor, an infrared sensor, and a radar sensor to detect the temperature of the molten zinc plating solution 2 flowing into the opening 111. A non-contact sensor may be applied to measure the first water level and the second water level of the molten surface of the hot-dip galvanizing solution 2 overflowing the dam wall 121 of the dam unit 120 and accommodated in the accommodation space A1.

In addition, the controller 200 is electrically connected to the first sensor 140 and the second sensor 150, receives sensing signals from the first sensor 140 and the second sensor 150, and receives the sensing signals. The flow rate of the molten galvanizing solution 2 pumped by the pump unit 130 or by raising or lowering the snorkel unit 110 to adjust the depth at which the snorkel unit 110 is immersed in the plating bath 300 according to the It is possible to adjust the load of the pump unit 130 to control.

For example, when the controller 200 detects that the foreign material D is approaching the steel plate 1 through the first sensor 140, the snorkel part 110 is lowered so that the lower end of the snorkel part 110 is plated. The immersion depth in the bath 300 can be increased.

More specifically, foreign matter floating on the molten surface of the molten zinc plating solution 2 introduced into the snorkel part 110 through the opening 111 of the snorkel part 110 by the first sensor 140 ( D) When it is sensed that the steel plate 1 is approaching, the control unit 200 lowers the snorkel unit 110 to increase the depth at which the lower end of the snorkel unit 110 is immersed in the plating bath 300, thereby increasing the depth of the snorkel unit 110. The upper end of the dam wall part 121 of the dam unit 120 installed at the lower end of the part 110 can be controlled to be lower than the molten surface of the hot-dip galvanizing solution 2 introduced into the snorkel part 110.

Accordingly, the molten zinc plating solution 2 introduced into the snorkel part 110 through the opening part 111 of the snorkel part 110 is induced to overflow the dam wall part 121 more quickly, so that the snorkel part ( 110) By quickly guiding the flow of the hot-dip galvanizing solution 2 from the opening 111 to the receiving space A1 of the dam unit 120 inside, foreign substances floating on the molten surface of the hot-dip galvanizing solution 2 ( D) along with the flow of the hot-dip galvanizing solution 2, it moves away from the steel plate 1, overflows the dam wall 121, and is accommodated in the receiving space A1 of the dam unit 120, and then pumped by the pump unit 130 into the plating bath. It can be induced to be discharged to the hot water surface of (300).

In this way, when the foreign matter D approaches the steel plate 1 by the first sensor 140 and the controller 200, the immersion depth of the snorkel part 110 is automatically controlled, so that the foreign matter in the hot-dip galvanizing process. (D) can be prevented from adhering to the steel plate 1.

In addition, the control unit 200 determines the water level difference (H) between the first water level of the opening 111 detected through the second sensor 150 and the second water level of the accommodation space A1 of the dam unit 120 ) is compared, and the load of the pump unit 130 can be increased as the water level difference (H) becomes smaller.

More specifically, as the water level difference H between the first water level of the opening 111 and the second water level of the accommodation space A1 of the dam unit 120 decreases, the snorkel part 110 As the height of the molten metal surface of the introduced molten zinc plating solution 2 and the upper end of the dam wall portion 121 are similar, the melt introduced into the snorkel portion 110 through the opening portion 111 of the snorkel portion 110 A flow of the galvanizing solution 2 overflowing the dam wall portion 121 and flowing into the accommodation space A1 of the dam unit 120 may be weakened. In this case, the foreign matter (D) floating on the molten surface of the hot-dip galvanizing solution (2) inside the snorkel part (110) also weakens its flow, and as the floating time around the steel plate (1) increases, the foreign matter (D) The probability of being attached to the steel plate 1 and causing a defect may increase.

Therefore, the first water level of the opening 111 and the second water level of the accommodation space A1 of the dam unit 120 are detected through the second sensor 150 so that an appropriate water level difference H can be maintained. By appropriately controlling the load of the pump unit 130 according to the water level difference H between the first water level of the opening 111 and the second water level of the accommodation space A1 of the dam unit 120, the snorkel unit (110) Prevention of foreign matter (D) floating on the surface of the hot-dip galvanizing solution (2) from adhering to the steel sheet (1), and maintenance of an appropriate load of the pump unit (130), thereby increasing the lifespan of the pump unit (130) It may also have an increasing effect.

Here, the water level difference (H) at which the first water level of the opening part 111 and the second water level of the accommodation space A1 of the dam unit 120 is appropriate is set in advance by the operator and the control unit 200 The first water level of the opening 111 and the second water level of the accommodating space A1 of the dam unit 120 are determined by the previously set and input water level difference H. It is possible to control the load of the pump unit 130 so that is maintained.

In addition, the control unit 200 controls the immersion depth of the snorkel unit 110 as well as the load control of the pump unit 130 in conjunction with the second sensor 150, thereby controlling the first water level of the opening 111. and the second water level in the accommodating space A1 of the dam unit 120 may be induced to maintain an appropriate water level difference H.

For example, when the second water level of the dam unit 120 is lower than a preset reference water level, the control unit 200 lowers the snorkel unit 110 so that the lower end of the snorkel unit 110 is in the plating bath 300. When the immersion depth is increased and the second water level is higher than the reference water level, the snorkel part 110 is raised to decrease the immersion depth of the lower end of the snorkel part 110 in the plating bath 300 .

Accordingly, the second water level of the dam unit 120 is lower than the preset reference water level, so that the first water level of the opening 111 and the second water level of the accommodation space A1 of the dam unit 120 are Depth at which the upper end of the dam wall part 121 is immersed from the molten surface of the hot-dip galvanizing solution 2 introduced into the snorkel part 110 by lowering the snorkel part 110 when the water level difference (H) is large. By deepening, the flow of the hot-dip galvanizing solution 2 introduced through the opening 111 over the dam wall 121 can be increased to induce a decrease in the water level difference H. Conversely, the second water level of the dam unit 120 is higher than the preset reference water level, so that the first water level of the opening 111 and the second water level of the accommodation space A1 of the dam unit 120 When the water level difference (H) almost disappears, the upper end of the dam wall part 121 is submerged from the molten surface of the hot-dip galvanizing solution 2 introduced into the snorkel part 110 by raising the snorkel part 110. By making the depth shallow, the flow of the hot-dip galvanizing solution 2 introduced through the opening 111 over the dam wall 121 can be reduced, and the water level difference H can be induced to increase.

Therefore, according to the snout control system and the hot-dip galvanizing facility including the snout control system according to an embodiment of the present invention, the foreign matter D near the dam unit 120 inside the snorkel part 110 of the snout device 100 By recognizing the flow of water and the water level difference (H) of the water surface inside and outside the dam unit 120 through the sensors 140 and 150, when the foreign matter D near the dam unit 120 approaches the steel plate 1 By raising or lowering the snorkel part 110 of the naut device 100, the depth at which the lower end of the snorkel part 110 is immersed in the plating bath 300 is automatically controlled so that foreign substances D are mixed into the steel plate 1. is suppressed, and the load of the pump unit 130 is automatically adjusted according to the water level difference (H) of the water surface inside and outside the dam unit 120 to maintain an appropriate load, thereby floating foreign matter inside the snorkel part 110 ( D) can increase the life of the pump unit 130 and easy discharge.

In this way, the first sensor 140 capable of detecting the foreign matter D floating on the molten water surface inside the snorkel unit 110 of the snout device 100 and the water level difference between the inside and outside of the dam unit 120 ( H) by using the second sensor 150 capable of detecting dam management inside the snout device 100, it is possible to have an effect of securing operational convenience and quality stability.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

1: grater
2: hot-dip galvanizing solution
100: snout device
110: snorkel part
111: opening
112: inner wall
120: dam unit
121: dam wall
130: pump unit
131: housing part
132: impeller part
133: drive motor
140: first sensor
150: second sensor
200: control unit
300: plating bath
500: air knife
600: welding facility
700: heating facility
800: rolling equipment
900: post-processing facility
1000: Hot-dip galvanized steel sheet manufacturing process

Claims (10)

a snout device for introducing the steel sheet into the plating bath by immersing one end in a plating bath containing a hot-dip galvanizing solution for plating the steel sheet during the production process of the hot-dip galvanized steel sheet; and
Including; a control unit for controlling the snout device;
The snout device,
a snorkel part formed to surround the steel sheet flowing into the plating bath and guiding the steel sheet to be introduced into the molten zinc plating solution accommodated in the plating bath through an opening formed at a lower end immersed in the molten metal surface of the plating bath;
In the opening part of the snorkel part, a dam wall part formed along the inner circumference of the snorkel part so as to be spaced apart from the inner wall part of the snorkel part by a predetermined distance and protrude at a predetermined height in the height direction of the snorkel part, and the inner wall part of the snorkel part and a dam unit forming an accommodation space between the dam wall portions to accommodate the molten zinc plating solution flowing through the opening and then overflowing the dam wall portion;
a pump unit installed outside the snorkel unit to pump the molten zinc plating solution accommodated in the accommodation space of the dam unit into the plating bath;
a first sensor installed on one side of the inner space of the snorkel part and detecting a foreign object floating on the molten surface of the molten zinc plating solution and approaching the steel sheet; and
It is installed on the other side of the inner space of the snorkel part, and the first water level of the molten zinc plating solution flows into the opening and the second of the molten zinc plating solution overflows the dam wall and is accommodated in the accommodation space of the dam unit. a second sensor to measure the water level;
Including, snout control system. According to claim 1,
The control unit,
receiving a sensing signal from the first sensor and the second sensor, and raising or lowering the snorkel part or pumping the snorkel part so that the snorkel part can adjust the immersed depth in the plating tank according to the sensing signal; A snout control system for adjusting the load of the pump unit so as to control the flow rate of the hot-dip galvanizing solution. According to claim 2,
The control unit,
When it is detected through the first sensor that the foreign material is approaching the steel plate, the snorkel part is lowered to increase a depth in which the lower end of the snorkel part is immersed in the plating bath. According to claim 2,
The control unit,
Comparing the water level difference between the first water level of the opening detected through the second sensor and the second water level of the accommodation space of the dam unit, and increasing the load of the pump unit as the water level difference decreases, Snout control system. According to claim 2,
The control unit,
When the second water level of the dam unit is lower than the reference water level set in advance, the snorkel part is lowered to increase the depth at which the lower end of the snorkel part is immersed in the plating tank, and the second water level is higher than the reference water level. The snorkel control system which raises the snorkel part to reduce the depth in which the lower end of the snorkel part is immersed in the plating tank. According to claim 1,
The first sensor,
A snout control system that is a vision sensor that detects the foreign matter floating on the molten surface of the hot-dip galvanizing solution using a camera image sensor. According to claim 1,
The second sensor,
Using a camera image sensor, the first water level of the molten zinc plating solution flowing into the opening and the second water level of the molten zinc plating solution overflowing the dam wall of the dam unit and accommodated in the accommodation space are measured. Vision sensor, snout control system. According to claim 1,
The second sensor,
The first water level of the molten zinc plating liquid molten surface flowing into the opening and the dam wall of the dam unit using any one of an ultrasonic sensor, an infrared sensor, and a radar sensor and accommodated in the receiving space A non-contact sensor for measuring the second water level of the snout control system. According to claim 1,
The pump unit,
It is installed on the outside of the snorkel part at a position corresponding to the dam unit, and the pumping space inside is connected to communicate with the accommodation space of the dam unit, and the molten zinc plating solution introduced from the accommodation space into the pumping space a housing portion having a discharge port formed on one side of the housing so that discharge may be discharged into the plating bath;
an impeller part rotatably installed in the pumping space of the housing part to flow the molten zinc plating solution introduced into the pumping space by a rotational drive toward the outlet; and
a drive motor installed on one side of the housing unit and connected to a rotating shaft of the impeller unit to rotate and drive the impeller unit;
Including, snout control system. A plating bath containing a hot-dip galvanizing solution;
The snout control system according to any one of claims 1 to 9, wherein one side is connected to a heating facility and the other side is immersed in the molten surface of the plating bath to introduce the steel sheet heat-treated in the heating facility into the plating bath; and
an air knife installed above the plating bath to adjust the thickness of the molten zinc adhering to the steel sheet passing through the plating bath;
Containing, hot-dip galvanizing equipment.

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