KR102181786B1 - Galvanizing plant - Google Patents

Abstract

Started galvanizing equipment. A galvanizing facility according to an embodiment of the present invention is provided in a rising section of a steel sheet rising through a plating bath, and a pair of brush rolls capable of removing the peeled plating layer while rotating in contact with both sides of the rising steel sheet; A driving unit driving a pair of brush rolls; A collection unit for collecting the peeling plating layer removed by a pair of brush rolls; A brush roll conveying device for bringing a pair of brush rolls closer to or spaced apart from the steel plate; And a control unit for controlling the operation of the driving unit and the brush roll transfer device.

Description

Galvanizing plant {GALVANIZING PLANT}

The present invention relates to a galvanizing facility capable of preventing contamination of facilities and product defects by removing a peeled plating layer from a steel sheet.

Cold rolled or hot rolled steel sheets are often plated with zinc on their surface. Galvanized steel sheets are widely used for various construction materials, electronic products, automobile steel sheets, etc. because of their beautiful appearance and high corrosion resistance.

Typical galvanizing facilities are equipped with a plating bath filled with hot-dip zinc so that the steel sheet heated in a heating furnace can be continuously supplied and plated, and a cooling device that rapidly cools the steel sheet while raising the plated steel sheet while passing through the plating bath. do. The cooling device may include a duct for accommodating the rising steel sheet, and a cold air injection nozzle for cooling the plated steel sheet by spraying cold air into the duct. The cooling device can reduce peeling of the plating layer and prevent spots or wrinkles in the plating layer by rapidly cooling the steel sheet rising after plating in the plating bath to solidify the plating layer.

On the other hand, in the galvanizing facility, the atmosphere or oxygen concentration of the heating furnace may not be stabilized at the initial stage after operation. If plating is performed in this state, the adhesion of the plating is deteriorated due to oxidation of the steel sheet, so that the plating layer may be peeled off. Particularly, the hard plating layer including the magnesium component may have increased peeling during the initial stabilization period.

As such, the plating layer peeled off from the steel sheet may scatter and contaminate the facility, and may cause product defects as it adheres to the surface of the deflector roll that changes the transfer of the steel sheet and then transfers to the steel sheet.

An aspect of the present invention is to provide a galvanizing facility capable of preventing contamination of facilities and product defects by removing a plating layer peeled from a steel sheet.

According to an aspect of the present invention, a pair of brush rolls provided in the rising section of the steel sheet ascending through the plating bath and capable of removing the peeled plating layer while rotating in contact with both surfaces of the rising steel sheet; A driving unit driving the pair of brush rolls; A collection unit for collecting the peeling plating layer removed by the pair of brush rolls; A brush roll transfer device for bringing the pair of brush rolls closer to or spaced apart from the steel plate; And a control unit for controlling the operation of the drive unit and the brush roll transfer device.

The galvanizing facility includes a deflector roll changing the direction of transfer of the steel sheet from the upper part of the rising section; And a cooling device installed in the rising section to cool the rising steel sheet, wherein the pair of brush rolls may be provided at an end position of the rising section between the deflector roll and the cooling device.

The collection unit may prevent scattering of the peeling plating layer collected surrounding the pair of brush rolls.

The galvanizing facility further includes a weight sensor installed in the collection unit to detect the weight of the collected peeling plated layer, and the control unit may notify the collection information of the peeling plated layer through an alarm unit based on the detection of the weight sensor.

The control unit includes the drive unit and the drive unit so that the pair of brush rolls approach the steel sheet for a set time at the beginning of operation of the facility to remove the peeling plating layer, and after the end of the set time, the pair of brush rolls are separated from the steel plate and terminate the removal of the peeling plated layer. The brush roll transfer device can be controlled.

According to another aspect of the present invention, the deflector roll for changing the conveying direction of the steel sheet in the upper portion of the rising section of the steel sheet rising through the plating bath; A cooling device installed in the rising section to cool the rising steel sheet; And it is provided at the end position of the rising section between the deflector roll and the cooling device, a galvanizing facility including a peeling plated layer removal device having a brush roll for removing the peeled plated layer while rotating in contact with the rising steel plate. have.

In the galvanizing facility according to an embodiment of the present invention, since the stripping metal layer removal device operates only for a set time after the facility is operated, it is possible to smoothly remove the stripping plating layer that occurs a lot at the beginning of the facility operation, thereby preventing contamination of the facility. In addition, it is possible to prevent product defects by preventing the peeling plating layer from adhering to the deflector roll.

In the galvanizing facility according to an embodiment of the present invention, when the facility is stabilized after the set time has elapsed and a peeling plating layer does not occur, a pair of brush rolls may be separated from the steel sheet to minimize wear of the brush roll.

1 shows a zinc plating facility according to an embodiment of the present invention.
2 is a perspective view of an apparatus for removing a peeling plating layer of a galvanizing facility according to an embodiment of the present invention.
3 is a cross-sectional view of an apparatus for removing a peeling plating layer of a galvanizing facility according to an embodiment of the present invention, illustrating a state in which a pair of brush rolls approach a steel sheet.
4 is a cross-sectional view of an apparatus for removing a peeling plating layer of a galvanizing facility according to an embodiment of the present invention, showing a state in which a pair of brush rolls are spaced apart from a steel plate.
5 shows a control operation of an apparatus for removing a peeling plating layer of a galvanizing facility according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following examples are presented in order to sufficiently convey the spirit of the present invention to those of ordinary skill in the art to which the present invention pertains, and may be embodied in other forms without being limited thereto. In the drawings, in order to clarify the present invention, portions not related to the description may be omitted, and the size of components may be slightly exaggerated to help understanding.

Referring to FIG. 1, the galvanizing facility includes a plating bath 20 filled with hot-dip zinc so that the transferred steel sheet 10 can be immersed and plated, and a steel sheet 10 supplied to the plating bath 20 to increase plating adhesion. An air knife 40 is provided in a heating furnace 30 for heating and in the rising section of the steel sheet 10 rising after being plated in the plating bath 20 to control the thickness of the plating layer.

In addition, the galvanizing facility is installed in the rising section of the steel plate 10 after the air knife 40 and the deflector roll 50 to change the direction of transfer of the steel plate 10 from the top of the rising section of the steel plate 10 after plating. 10) a cooling device 60 for cooling, and a peeling plating layer removing device 100 provided at an end position of the rising section between the deflector roll 50 and the cooling device 60.

The cooling device 60 may include a duct (not shown) for accommodating the rising steel plate 10 and a cold air injection nozzle (not shown) for cooling the plated steel plate 10 by spraying cold air into the duct. The cooling device 60 rapidly cools the steel sheet 10 rising after plating in the plating bath 20 to solidify the plating layer, thereby reducing peeling of the plating layer and preventing spots or wrinkles in the plating layer.

The peeling plated layer removal device 100 may remove the peeled plated layer from the steel plate 10 rising through the cooling device 60. In the galvanizing facility, the plating layer may be peeled off until the facility is stabilized at the initial stage of operation, and the peeling plating layer removing device 100 may remove the peeled plating layer to prevent contamination of the facility and prevent product defects.

2 and 3, the peeling plating layer removal device 100 includes a pair of brush rolls 111 and 112, driving units 121 and 122, collection units 131 and 132, brush roll transfer devices 141, 142, 143 and 144, and a control unit 150 can do.

A pair of brush rolls 111 and 112 are installed to be in contact with both sides of the steel plate 10 at the end of the rising section between the deflector roll 50 and the cooling device 60, and approach the surface of the steel plate 10 or 10) It is supported so that it can advance and retreat to be separated from the surface. These brush rolls 111 and 112 rotate while in contact with the steel plate 10 to remove the peeling plating layer on the surface of the steel plate 10 that has risen through the cooling device 60.

The driving units 121 and 122 may be composed of two electric motors connected to the rotational shafts of the brush rolls 111 and 112 to rotate the brush rolls 111 and 112. Here, the case where the driving units 111 and 112 are composed of two electric motors is presented, but the driving units 111 and 112 are not limited thereto and may be variously changed in a form capable of simultaneously rotating a pair of brush rolls by employing a plurality of gears. have.

The collection portions 131 and 132 may be in the form of a duct surrounding the outside of the pair of brush rolls 111 and 112 in a form accommodating a pair of brush rolls 111 and 112. The collection portions 131 and 132 may collect the peeling plating layer removed from the steel plate 10 by the operation of the pair of brush rolls 111 and 112 therein, and prevent the peeling plating layer from scattering to the outside.

As shown in FIG. 2, a weight sensor 135 may be installed in the collection units 131 and 132 to detect the weight of the collected peeling plating layer and transmit it to the control unit 150. The weight sensor 135 detects the weight of the collection portions 131 and 132 that increases as the peeling plated layer removed by the operation of the pair of brush rolls 111 and 112 is accumulated in the collection portions 131 and 132, and the amount of peeling plated layer generated per unit time , Accumulation amount, etc. can be measured.

The brush roll transfer devices 141, 142, 143, and 144 are coupled to both ends of the shaft of each brush roll 111 and 112, respectively, as shown in FIGS. 3 and 4, and a plurality of bearings 141a and 142a rotatably supporting the brush rolls 111 and 112 , 143a, 144a), a plurality of shaft support parts (141b, 142b, 143b, 144b) each supporting the outer side of a plurality of bearings, a plurality of shaft support parts (141b, 142b, 143b) while being fixed to the outside of the collection boxes (131, 132), It may include a plurality of hydraulic cylinders (141c, 142c, 143c, 144c) for advancing and retreating 144b in a direction close to or spaced apart from the steel plate 10, respectively.

These brush roll transfer devices 141, 142, 143, and 144 may bring each brush roll 111, 112 on both sides of the steel plate 10 close to the steel plate 10 as in the example of FIG. 3, or may separate them from the steel plate 10 as in the example of FIG. . The driving units 121 and 122 for driving the brush rolls 111 and 112 may move together with the shaft support portions 141b and 143b while being fixed to the shaft support portions 141b and 143b.

As shown in FIG. 2, the controller 150 may control the operations of the driving units 121 and 122 and the brush roll transfer devices 141, 142, 143 and 144 according to a command input through the operation unit 151 or an embedded program. In addition, the control unit 150 may control to notify, through the alarm unit 152, of the generation amount and accumulation amount of the peeling plating layer per unit time based on the detection information of the weight sensor 135. The alarm unit 152 may include a lamp, an electric sign, and a display panel.

The control unit 150 removes the peeling plating layer by approaching the steel plate 10 for a set time during the initial operation of the facility, and after the set time is over, the pair of brush rolls 111 and 112 The driving units 121 and 122 and the brush roll transfer devices 141, 142, 143, and 144 may be controlled so as to end the removal of the peeling plating layer while being spaced apart from (10).

This control takes into account that there are many generations of peeling plating layers because the facilities such as the atmosphere of the heating furnace or oxygen concentration are not stabilized at the beginning of operation of the galvanizing facility. That is, the peel-plated layer removal device 100 operates for a predetermined time (about 1 hour) at the beginning of the operation of the facility to remove the peel-plated layer, and after the set time has elapsed and the facility is stabilized, the peel-plated layer removing device 100 It is to be able to end the operation of.

Next, the control operation of the peeling plating layer removing apparatus will be described with reference to FIG. 5.

As shown in FIG. 5, the control unit 150 of the peeling plating layer removing device 100 starts the operation of the galvanizing facility, and the brush roll transfer devices 141, 142, 143, and 144 move each brush roll 111, 112 as shown in FIG. It moves so as to contact the surface of the steel plate 10 (171), and the driving units 121 and 122 rotate each brush roll 111 and 112 to start removing the plated layer peeling off from the surface of the steel plate 10 (172).

Thereafter, the control unit 150 determines whether a set time has elapsed since the start of the peeling plating layer removal operation (173). Here, the set time may be set in advance by the operator through the operation unit 151. If it is determined in step 173 that the set time has not elapsed, the peeling plating layer is removed while the brush rolls 111 and 112 are in contact with the steel plate 10 continuously.

If it is determined that the set time has elapsed in step 173, the brush roll transfer devices 141, 142, 143, and 144 move each brush roll 111 and 112 apart from the surface of the steel plate 10 as in the example of FIG. 4 (174), and the driving units 121 and 122 ) Stops the operation to stop each brush roll (111, 112) (175).

As described above, in the galvanizing facility according to an embodiment of the present invention, since the stripping metal layer removal device 100 operates only for a set time after the facility is operated, it is possible to smoothly remove the stripping plating layer that occurs a lot at the beginning of the facility operation. Pollution can be prevented, and product defects can be prevented by preventing the peeling plating layer from adhering to the deflector roll 50.

In the galvanizing facility according to an embodiment of the present invention, when the facility is stable after a set period of time and no peeling plating layer is generated, abrasion of the brush rolls 111 and 112 can be minimized by separating the pair of brush rolls 111 and 112.

10: steel plate, 20: plating bath,
30: heating furnace, 40: air knife,
50: deflector roll, 60: cooling device,
100: peeling plating layer removal device, 111, 112: brush roll,
121,122: drive unit, 131,132: collection unit,
135: weight sensor, 141,142,143,144: brush roll transfer device,
150: control unit, 152: alarm unit.

Claims (6)

A pair of brush rolls provided in the rising section of the steel sheet ascending through the plating bath and the cooling device and capable of removing the plating layer peeled off the surface of the steel sheet while rotating in contact with both surfaces of the rising steel sheet;
A driving unit driving the pair of brush rolls;
A collection unit for collecting the peeling plating layer removed by the pair of brush rolls;
A brush roll transfer device for bringing the pair of brush rolls closer to or spaced apart from the steel plate; And
At the beginning of operation of the facility, the pair of brush rolls approach the steel plate for a set time to remove the peeling plating layer on the surface of the steel plate, and after the set time ends, the pair of brush rolls are separated from the steel plate, and the peeling plated layer on the steel plate surface And a control unit for controlling the operation of the drive unit and the brush roll transfer device to end removal. The method of claim 1,
A deflector roll changing the direction of transfer of the steel plate from the upper part of the rising section; And
The pair of brush rolls is provided at the end position of the rising section between the deflector roll and the cooling device. The method of claim 1,
The collection unit is a zinc plating facility that surrounds the pair of brush rolls and prevents scattering of the collected peeling plating layer. The method of claim 1,
Further comprising a weight sensor installed in the collection unit to detect the weight of the collected peeling plating layer,
The control unit is a zinc plating facility that notifies collection information of the peeling plating layer through an alarm unit based on the detection of the weight sensor. delete A deflector roll for changing the conveying direction of the steel sheet in the upper part of the rising section of the steel sheet rising through the plating bath;
A cooling device installed in the rising section to cool the rising steel sheet; And
Separation plating layer removal provided with a brush roll that is provided at the end of the rising section between the deflector roll and the cooling device and rotates in contact with the steel sheet rising for a set time at the beginning of operation of the facility to remove the plating layer peeled off the surface of the steel sheet Galvanizing equipment including equipment.

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