KR101647152B1 - Apparatus for Preventing Foreign Materials from Attaching to Support Roll for Coated Strip - Google Patents

Abstract

There is provided an apparatus for effectively preventing the adherence of foreign matter, particularly a plating material (molten zinc), on a surface of a plated steel plate advancing roll, in particular, a surface of a support roll for supporting the progress of the plated steel plate and suppressing vibration.
The apparatus for preventing foreign matter adherence of the plated steel plate advancing roll includes, for example, a device housing disposed close to a plated steel plate advancing roll; And a mist generating unit provided inside the apparatus housing to form a water film on the surface of the roll, wherein the mist generating unit includes: a nozzle body mounted on an upper portion of the water storage unit provided at a lower portion of the apparatus housing; A mist nozzle means provided at an upper end of the nozzle body and having a mist nozzle portion formed in proximity to the roll surface; And mist generating means connected to the mist nozzle means and provided in a piezoelectric element provided in a water storage portion of the apparatus housing to generate a mist.
According to the present invention, it is possible to form a uniform water film on the entire surface of the plated steel plate advancing roll (support roll) which supports the progress of the plated steel plate and suppresses the vibration, As well as an improved effect of stably preventing the adhesion of the surface of the roll, such as a plating material (molten zinc) or other foreign matter.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus for preventing foreign matter from adhering to a coated roll,

The present invention relates to a plated steel plate supporting roll, in particular, to a plated steel plate supporting roll, and more particularly to a plated steel plate supporting roll which supports the progress of the plated steel plate and suppresses vibration, And to prevent the surface of the roll surface or the steel sheet from being cooled, as well as to effectively prevent the adhesion of the roll surface such as a plating material (molten zinc) or other foreign matters to the apparatus will be.

In general, the plating process of a steel sheet, in particular, a continuous zinc plating process for continuously plated molten zinc on a steel sheet is shown in FIG.

For example, as shown in FIG. 1, a continuous galvanizing line (CGL) is formed by galvanizing a continuous steel strip (strip) 100 to be plated while passing through molten zinc 112 filled in a plating bath 110 .

At this time, the advancing direction of the steel plate 100 inserted into the plating vessel shown in FIG. 1 is switched upward by the sink roll 120 disposed in the plating vessel 110, while the advancing direction of the stabilizing roll The upward movement of the steel plate is adjusted by the first and second plates 130.

The steel sheet 100 having the molten zinc 112 adhered thereto through the plating bath is sprayed on the surface of the steel sheet 100 by a high pressure gas (air) sprayed while passing through the air knife (wiping nozzle) The molten zinc adhered to the steel sheet is cut and the thickness of the steel sheet is adjusted.

The plated steel sheet that has passed through the air knife is plated by passing through the upper plated steel plate advancing roll, that is, the plated steel plate supporting roll 150 and the cooling tower 160.

At this time, the support roll (also referred to as a touch roll) supports the progressive coated steel sheet and stabilizes the progress of the coated steel sheet.

However, the support roll 150 may be configured to support the progress of the steel plate while suppressing the vibration while touching the steel plate installed to be idle and touching the steel plate.

Alternatively, as illustrated in FIG. 4, it may be a form driven by an external driving source and supporting the progressively-coated steel plate while moving toward the steel plate in correspondence with the thickness of the steel plate to suppress the vibration.

Here, as shown in FIG. 1, the stabilizing roll 130 in the plating tank and the support roll 150 on the plating tank can cooperate with each other to suppress vibration generated during the progress of the coated steel sheet.

For example, in the steel plate continuous plating process, the vibration of the plated steel sheet is caused by the self-vibration of the sink roll and the stabilizing roll in the plating tank and the air injection in the cooling tower.

However, since the vibration of the steel sheet caused by the progress of the coated steel sheet directly affects the variation of the thickness of the coating on the air knife described above, the plating quality of the coated steel sheet is determined, It is important in the production stage of steel sheet.

In particular, recently, in order to improve the productivity of the coated steel sheet, the galvanization is performed on the assumption that the steel sheet is subjected to high-speed advancement, so that the vibration of the steel sheet is further amplified as the steel sheet proceeds at high speed, The role of the support roll 150 is important.

However, there is a problem that the plating material on the surface of the steel sheet, that is, the molten zinc is transferred and adhered to the surface of the steel plate support roll 150 (that is, the touch roll supporting the steel plate while touching it to suppress the steel plate vibration) will be.

When the molten zinc adhering to the surface of the support roll is accumulated, the molten zinc is transferred again to the surface of the steel sheet passing through the roll, and the molten zinc adheres to the surface of the steel sheet. This is because the plating quality of the steel sheet, The quality of the local overpayment is lowered.

Therefore, it is important to inhibit the adhesion of molten zinc to the surface of such a support roll from the steel plate.

Korean Patent Publication No. 2003-53368 discloses a technique of forming a water film on the surface of a roll in order to suppress adhesion of molten zinc to the surface of such a support roll.

For example, in the case of the above patent, although not shown in the drawings, a water film is formed on the surface of a roll by using a wiper pad for transferring cooling water to a surface of a high temperature support roll (touch roll) .

However, since such a wiper pad is usually provided as artificial leather with good water supply property, the wiper pad, which is an artificial leather, is formed on the entire surface of the roll surface due to the shape characteristics of the support roll, There is a problem that local molten zinc or other foreign matter is adhered if the water film distribution on the roll surface is not uniform.

In addition, since the conventional wiper pad needs to be in direct contact with the roll surface, it is easily worn and the formation of the water film on the roll surface is difficult, and the operation load due to equipment maintenance is also considerable.

Accordingly, the applicant of the present invention has found that it is possible to form a water film very easily on the surface of a coated steel plate advancing roll, in particular, a support roll, and more particularly to provide a water film- The invention has been proposed.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a plated steel plate advancing roll which supports the progress of a plated steel plate and suppresses vibration, And to prevent foreign matter from adhering to the plated steel plate advancing roll.

In addition, it is possible to form a water film uniformly and firmly on the entire surface of the support roll, so that the cooling of the surface of the steel sheet passing through the roll surface or the roll can be smoothly performed in the first place, And to stably prevent the adhesion of the roll to the surface of the roll.

Technical Solution [10] In order to achieve the above object, the present invention provides a method of manufacturing a coated steel sheet, comprising: And

A mist generating unit provided inside the apparatus housing and provided to form a water film on a roll surface;

Wherein the mist generating unit includes a nozzle body mounted on an upper portion of a water reservoir provided at a lower portion of the apparatus housing and a mist nozzle unit formed at an upper end of the nozzle body and formed near the roll surface; And a mist generating means connected to the mist nozzle means and provided in a water storage portion of the apparatus housing to generate a mist.

Preferably, the plated steel plate advancing roll is provided as a progressive steel plate supporting roll disposed on the plating vessel so as to suppress the vibration of the plated steel plate, and the apparatus housing extends in the longitudinal direction of the support roll, And an opening which is located and is positioned close to the surface.

More preferably, the nozzle body further includes an inlet through which mist or condensed water flows, and a small fan is further provided in the nozzle body to have at least a mist circulation structure.

More preferably, the piezoelectric element of the mist generating means is connected to any one or both of the steel plate vibration detecting sensor and the steel plate temperature detecting sensor disposed close to the steel sheet in the vicinity of the roll , And is configured to operate in conjunction with a device control unit provided with a steel plate advance speed in advance or in real time.

More preferably, the device control portion is associated with a water supply pipe connected to a water storage portion of the device housing, or an electronic valve provided in a water discharge pipe connected to the device, and the water storage portion is provided with a level sensor As shown in FIG.

More preferably, a guide roll is further provided on the upper end of the apparatus housing.

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According to the apparatus for preventing adhesion of the coated steel strip traveling roll according to the present invention, it is possible to form a uniform film over the entire surface of the coated steel strip traveling roll, especially the support roll, Therefore, not only the surface of the steel sheet passing through the roll surface or the roll is cooled, but also the adhesion of the molten zinc or other foreign matter to the roll surface is stably prevented.

Accordingly, it is an object of the present invention to prevent adherence of molten zinc as well as other foreign matter, such as foreign matter of a coated steel strip advancing roll, particularly a support roll, to prevent surface damage of the progressive- It is possible to prevent the vibration of the steel sheet due to foreign matter adhered to the roll and to improve the quality and productivity of the steel sheet.

1 is a schematic view showing a continuous galvanizing process (CGL) showing a known coated steel plate advancing roll, that is, a support roll,
FIG. 2 is an overall configuration view showing an apparatus for preventing foreign matter adhered to a coated steel strip advancing roll according to the present invention,
Fig. 3 is a plan view of Fig. 2,
4 is a perspective view showing the installation state of the present invention shown in Fig.

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

2 to 4 show an apparatus 1 for preventing foreign matters from adhering to a coated steel strip advancing roll according to the present invention.

That is, the apparatus 1 of the present invention as described above includes an apparatus housing 10 which is disposed in close proximity to a support roll 150 that largely supports a steel plate in the present embodiment, And a mist generating unit 30 provided to generate a mist for forming a water film.

At this time, the apparatus housing 10 of the present invention is preferably disposed close to the lower portion of the support roll 150 supporting the plated steel sheet 100 as shown in FIGS. 2 and 4.

Therefore, as described in detail below, the apparatus of the present invention is characterized in that the mist generated by causing the mist (M) containing a large amount of water particles in the lower portion of the support roll to form a water film on the surface of the roll, (Molten zinc) of the plated steel sheet is prevented from adhering to the roll surface.

For example, since the water film is formed on the surface of the roll using the mist, the apparatus of the present invention not only uniformly forms a water film over the entire surface of the roll, but also uniformly forms the formation thereof, Foreign matter adhesion on the roll surface can be prevented more stably than water film formation.

That is, since the present invention apparatus forms an ultrathin (fine-thickness) water film W on the surface of the support roll 150, the direct contact between the roll surface and the steel sheet is blocked, so that the roll adhesion of molten zinc is prevented .

Further, in the case of the present invention apparatus, since the mist is sprayed from the bottom of the roll to the roll surface over the entire surface, the surface of the roll and the surface of the steel plate contacting the roll are uniformly cooled.

Furthermore, since the device of the present invention uses the piezoelectric element as the mist generating means 70, the control of the mist generation amount is precisely realized.

The support roll 150 is substantially the same as the support roll 150 of the present invention. The support roll is not tied to an external driving source as shown in Fig. 1, As shown in the drawing, the driving motor M can be supported by the support roll 150 supported by the number of roll shafts 152 to support the progressive steel plate while the external driving force is transmitted.

4, driving rollers 156 are connected to the number of roll shafts 152, so that the rolls can support a plated steel sheet that proceeds in response to a change in the thickness of the steel strip.

As shown in FIG. 4, the apparatus housing 10 of the present invention is fixedly disposed at a lower portion of a roll when the roll is not moved as shown in FIG. 1, and when the roll is moved as shown in FIG. 4, And the moving plate 154 fixed to the number of roll axles 152 of the roll 150 can be connected and fixed via a connecting rod 158.

4, when the support roll 150 is moved, the housing 10 of the apparatus of the present invention is fixed to the roll shaft receiving portion 152 to which the drive shaft (not shown) of the support roll 150 is connected Since the rollers 152 are moved forward or backward in correspondence with the thickness of the steel plates by the drive cylinders 156 to move the support rolls at the same time, The position of the mist surface on the roll surface is constant regardless of the movement of the roll.

At this time, as described above, the apparatus housing of the present invention can be fixed to the lower portion of the roll on a separate equipment frame even in the case of the positionally fixed support rolls not interlocked with the idling cylinders.

As shown in FIG. 2, the apparatus housing 10 of the present invention is required to be installed at least longer than the maximum width of the steel sheet, as shown in FIGS. 2 and 3, , And the water film (W in FIG. 2) formed on the roll surface by extending the steel plate by a distance of 'D' is at least larger than the width of the maximum steel plate.

As shown in FIG. 2, a box-shaped water storage part 12 in which water supplied for generating mist is stored is provided in the lower part of the apparatus housing 10 of the present invention. A water supply pipe 14 and a water discharge pipe 16 may be respectively installed.

2 and 3, in the inventive apparatus 1, the mist generating unit 30 is provided in the inside of the apparatus housing 10, and the mist M is sprayed onto the surface of the roll And a mist generating means 70 connected to the mist nozzle means 50. The mist generating means 70 may be a mist generating means.

That is, the mist nozzle means (50) of the present invention is configured such that the mist (M) continuously generated by the mist generating means (70) is concentratedly sprayed to the roll surface to smooth the formation of the water film, Thereby enabling roll surface derivation of the mist.

More specifically, in this embodiment, the mist nozzle means 50 includes a nozzle body 52 mounted on the top of a water reservoir 12 provided at the bottom of the apparatus housing, And a roll of the mist nozzle portion 54 formed in proximity to the roll surface.

Particularly, in this embodiment, both sides of the nozzle body 52 further include an inlet 56 through which the mist M or the condensed water w 'flows, and inside the nozzle body 52, A small fan 58 (which may be a fan motor in which a fan and a motor are integrated) installed in a cruciform supporter (not shown) is provided so as to have at least a mist circulation structure.

2, the nozzle body 52 includes a first body 52a forming a mist nozzle 54 and a second body 52b forming an inlet 56 between the first body 52a and the second body 52b. As shown in FIG.

3, the nozzle body 52 is formed of a synthetic resin molded product and is installed in a form capable of being assembled and disassembled, and the mist generating means 70 is disposed inside the water storage portion 12 downwardly, It is preferable to make it possible to arrange it in the apparatus.

In addition, a hole is formed in the inlet 56 between the first and second bodies, or a support rod is installed in a longitudinal direction at a predetermined interval to introduce the mist into the water storage portion, and a mist generated by the small fan, As shown in FIG.

On the other hand, it is preferable that the apparatus housing 10 forms an inclined surface on the upper side of the water reservoir so that the condensed water (w ') that the mist is cooled down on the roll surface is collected in the water reservoir 12, (Not shown) may be formed in the second body 52b, which is fixed to the apparatus housing of the condenser 52, through which the condensed water passes.

2, the mist M generated by the mist generating unit 70 is supplied to the nozzle unit 54 through the nozzle unit 54 formed on the body 52 of the nozzle unit by the small fan 58, And is continuously attached to the surface of the roll to form a water film (W).

Then, the residual mist not directly attached to the roll surface is circulated while being introduced into the inlet 56 of the nozzle body by air flow by the small fan, so that the apparatus of the present invention enables the mist to be sufficiently supplied to the roll surface Is also uniformly supplied to the entire portion of the roll surface in the longitudinal direction at the lower portion of the roll, so that the water film is uniformly formed on the roll surface.

2 and 3, in the present invention apparatus, the mist generating means 70 may be provided as an externally controlled piezoelectric element provided on the sea side of the apparatus housing of the water reservoir 12 have. Mist generation using such a piezoelectric element is known.

At this time, preferably, since the plated steel plate support roll of the present invention is formed at least longer than the steel plate width, the mist generating means 70 of the piezoelectric element uniformly supplies the mist to the roll surface at predetermined intervals A plurality of the water storage portions are installed along the water storage portion to form the water film.

More preferably, as shown in Fig. 2, the piezoelectric element of the mist generating means 70 is provided with a steel plate vibration detecting sensor 90 or a steel plate temperature sensor 90 'And the operation is controlled in association with the device control unit C associated with the device control unit C'.

For example, the steel plate vibration detection sensor 90 is known, and when the infrared ray or laser beam is emitted and the signal period of colliding against the steel plate is compared and the steel plate vibration width is determined by the associated device control unit C, The control unit C can control the amount of mist generated in the piezoelectric element while being electrically connected with the piezoelectric element to control the amount of the applied current.

Alternatively, the temperature of the steel plate may be sensed through the temperature sensor 90 ', and the operation of the mist generation means 70, which is a piezoelectric element, may be controlled through the device control unit C in accordance with the sensed steel plate temperature to adjust the amount of mist generation This is because if the amount of generated mist increases, the water film layer on the roll surface is increased, and accordingly, the steel plate temperature in contact with the roll is lowered and cooling of the steel sheet is increased, so that it is possible to control the steel sheet temperature appropriately through temperature sensing of the steel sheet .

Therefore, at least the steel plate temperature detection sensor 90 'is preferably arranged so as to be close to the steel plate on the upstream side of the roll where the steel plate contacts the roll as shown in Fig.

It is also preferable that the steel plate advancing speed is input to the apparatus control section C in advance or in real time so that the apparatus control section C controls and operates the piezoelectric element serving as the mist generating means 70.

For example, when the steel plate traveling speed is '0', the rotation of the roll (whether idling or external driving) is stopped so that the generation of mist is interrupted to increase the amount of mist generated, that is, It is preferable that the applied current application amount is controlled through the device control unit to increase the generation of mist to make the water film on the surface of the roll uniformly maintained even if the roll is rotated at a high speed corresponding to the high-

Although not shown in the drawing, the speed of the steel sheet is controlled by connecting a speed sensor (not shown) for sensing the speed of the steel sheet to the apparatus controller C, It may be desirable to control it.

That is, in place of the steel sheet vibration detection sensor 90 on the downstream side of the roll in FIG. 2, a steel plate progress speed sensor (sensor) is disposed and connected to the device control unit to control and drive the piezoelectric device in real time .

It is most preferable that the piezoelectric element of the mist generating means is primarily controlled to operate in conjunction with the steel plate traveling speed and then the control is operated on the basis of the steel plate vibration and the temperature state, There is no difficulty in controlling the amount of mist generated.

2, an electronic valve (not shown) provided in the water supply pipe 14 and / or the water discharge pipe 16 connected to the water storage portion 12 of the inventive device housing 10, (V) to control the water supply and drain to the water reservoir.

More preferably, the box-shaped water storage part 12 is further provided with a level sensor 92, and when the level sensor is electrically connected to the device control part C, the water level in the water storage part The water supply will be automatically controlled according to the water supply.

Accordingly, since the steel sheet is usually continuously plated, the apparatus of the present invention can appropriately control the water supply until the completion of the continuous plating of the plated steel sheet, so that the generation of mist is not interrupted during the operation due to the lack of water will be.

In addition, as shown in FIG. 2, in the apparatus of the present invention, the upper end of the apparatus housing 10 is disposed between the surfaces of the support rolls 150 to block external leakage of the mist, A guide roll 18 may be further provided which presses and uniformizes the sheet.

For example, although not shown in FIG. 3, guide rolls divided in the longitudinal direction may be disposed on the upper end of the apparatus housing 10 via a bearing support (block) or the like.

As shown in FIG. 2, it is most preferable that the apparatus housing 10 in the present invention apparatus 1 has a U-shape having an opening 10a formed on the upper part thereof, This is because the condensate that falls off the surface can be collected and reused.

Therefore, according to the apparatus for preventing foreign objects on the coated steel strip traveling roll of the present invention described above, the formation of the water film itself on the roll surface is easy as well as the uniformity of the roll surface is high, It is possible to evenly prevent the adherence of foreign matter, particularly molten zinc, on the roll surface.

In particular, the thickness of the water film through control of the amount of generated mist can be adjusted, which is more preferable.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention, It will be appreciated that those skilled in the art will readily understand the present invention.

1 ... Prevent foreign body adhesion on plated steel plate running roll
10 .... device housing 12 .... water storage
30 .... mist generating unit 50 .... mist nozzle means
52 .... nozzle body 54 .... mist nozzle part
56 .... Inlet 58 .... Small fan
70 .... Mist generating means 90 .... Vibration detecting sensor
90 '.... Temperature sensor 92 .... Level sensor
C ... device controller

Claims (8)

An apparatus housing (10) arranged in close proximity to the plated steel plate advancing roll; And
And a mist generation unit (30) provided inside the apparatus housing (10) to provide a water film on the roll surface,
The mist generating unit (30)
A nozzle body 52 mounted on the upper part of the water storage part 12 provided at the lower part of the apparatus housing and a mist nozzle part 54 formed near the roll surface on the upper end of the nozzle body 52. [ Means (50); And
And mist generating means (70) connected to the mist nozzle means (50) and provided in a piezoelectric element provided in a water storage portion of the apparatus housing to generate mist.
The method according to claim 1,
The plated steel plate advancing roll is provided as a progressive steel plate supporting roll disposed on the plating bath to suppress the vibration of the plated steel plate,
Wherein the apparatus housing (10) includes an opening (10a) extending in the longitudinal direction of the support roll and positioned at a lower portion of the roll and positioned close to a surface of the roll.
delete delete The method according to claim 1,
The nozzle body 52 further includes an inlet 56 into which mist or condensed water flows and a small fan 58 is further provided inside the nozzle body 52 to have at least a mist circulation structure. Apparatus for preventing adhesion of foreign matter on a plated steel plate running roll.
The method according to claim 1,
The piezoelectric element of the mist generating means 70 is connected to either or both of the steel plate vibration detecting sensor 90 and the steel plate temperature detecting sensor 90 ' Is configured to operate in conjunction with a device controller (C) provided in advance or in real time.
The method according to claim 6,
The device control C is associated with a water supply pipe 14 associated with the water reservoir 12 of the device housing or with an electronic valve V provided on a further water discharge pipe 16,
Wherein the water storage part (12) further comprises a level sensor (92) connected to the apparatus control part.
The method according to claim 1,
Further comprising a guide roll (18) installed at an upper end of the apparatus housing (10).

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