KR20060055923A - Apparatus for removing metal particles - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing arsenic acid metal used to plate a steel plate surface with molten metal, the barrier rib being detachably attached to a side to which the gas is supplied from the outside and the steel sheet of the chamber, and having a plurality of through holes. Lip support having a blower slit formed parallel to the width direction of the steel plate by the upper end and the lower lip, the opposite front end of the upper lip and the lower lip detachably attached to the upper and lower surfaces of the lip support, respectively And a lip cleaner movable in parallel to the width direction of the steel plate on the lower lip, a driving device for moving the lip cleaner, and a lip cleaner cover covering the movement path of the lip cleaner on the upper side of the lip cleaner. The present invention relates to a device for removing arsenic acid.

Metallic Acid Removal Device

Description

Metallic acid removal device {APPARATUS FOR REMOVING METAL PARTICLES}

1 is a schematic view showing a plating process of a general steel mill.

2 is a side view of an air knife according to the prior art.

3 is a plan view of an air knife according to the related art shown in FIG.

4 is a schematic side view of an air knife according to the present invention.

5 is a schematic front view of the air knife according to the present invention with the upper lip removed.

6 is a schematic plan view for explaining a driving method of the lip cleaner in the air knife according to the present invention.

7 is a plan view of one embodiment of a lip cleaner used in an air knife according to the present invention.

8 is a side view of one embodiment of a lip cleaner used in an air knife according to the present invention.

9 is a rear view of an embodiment of a lip cleaner used in an air knife according to the present invention.

10 shows an embodiment in which a wire cable is connected.

The present invention relates to an air knife used to plate a steel sheet surface with molten metal, and more particularly, to prevent plating deviation of the steel sheet due to local flow disturbance caused by flow interference in the slit from which jet gas is discharged. It relates to an air knife for steel plate plating that can produce a plated steel sheet of excellent quality.

In general, a process of plating molten metal on a steel plate in a steel mill in a continuous manner is carried out by passing a steel plate proceeding in one direction through a bath filled with molten metal, and then exiting the tub and airknife disposed on both left and right sides of the steel sheet proceeding in one direction. This is to control the thickness of the metal for plating in the molten state remaining on the surface of the steel sheet.

FIG. 1 is a schematic view showing a plating process of a general steel mill. As shown in the drawing, a steel sheet heat-treated with a predetermined heat cycle in a heat treatment furnace 102 may be a molten metal having a snout 103 filled with an atmosphere gas after the heat treatment. An air knife for injecting a gas to adjust the amount of molten metal buried in the surface of the steel sheet to the left and right sides of the steel sheet proceeds in one direction while passing through the immersion roll 106 in the bath 104 included in one direction. 105 is installed.

That is, the molten metal adhered to the surface of the steel sheet by the viscous force between the surface of the steel sheet and the molten metal is scraped off as the impact pressure and shear stress by the jet gas discharged from the air knife 105 to the steel sheet surface side. The plating thickness will be obtained.

2 and 3 illustrate a conventional air knife disclosed in US Pat. No. 4,535,936. The conventional air knife 201 includes a body 202 including upper and lower ribs 203 and 204, as shown in FIG. ), A blower slit 205 formed by the tip of the upper and lower lip, and a lip cleaner 206 for removing molten metal buried in the blower slit and disturbing the flow of the jet gas.

On the other hand, the drive device for reciprocating the lip cleaner 206 in parallel to the axial direction of the air knife 201 is a wire cable 208 connected to the lip cleaner 206, as shown in FIG. Deflection rollers 209, 210, and 211 for the wire cable 208 and drive roller 212, shaft 215, and handle 217.

Thus, when the user turns the handle 217, the wire cable 208 connected to the lip cleaner 206 passes through the drive roller 212, the deflection roller 210, the deflection roller 211, and the deflection roller 209. The rotative cleaner 206 connected to the wire cable 208 is rotated between the deflection roller 210 and the deflection roller 211. It will move back and forth.

However, in this prior art, the wire cable 208 for driving the lip cleaner 206 is placed on the flow path of the gas to be discharged to disturb the flow. Therefore, the flow becomes non-uniform due to the generation of vortices by the wire cable 208, which adversely affects the plating thickness of the steel sheet, resulting in a problem of deteriorating the plating quality of the steel sheet.

In addition, in the prior art, the lip cleaner 208 can only remove the molten metal buried in the blowing slit 205 formed by the top and bottom lips 203 and 204. Therefore, molten metal is still buried around the air blowing slit 205, and this also acts as an obstacle to flow, causing a problem of deteriorating the plating quality of the steel sheet.

Furthermore, in the prior art, since the lip cleaner is formed in a straight shape, there is a problem that the molten metal is not smoothly removed due to vibration or the like during operation.

Accordingly, the present invention is proposed to solve the problems of the prior art as described above, the object of which is the flow interference and blowing slit by flow obstacles such as wire exposed to the flow path inside the air knife to disturb the flow It is to provide an air knife with a simple structure that can prevent the plating deviation of the steel sheet by minimizing the flow interference by the molten metal buried around.

In order to achieve the above object, the present invention is an air knife for controlling the plating amount of the plating metal in the molten state attached to the surface of the steel sheet,

A chamber through which gas is supplied from the outside,

A lip support detachably attached to a side facing the steel plate of the chamber and having a partition wall having a plurality of through holes formed therein;

An upper lip and a lower lip detachably attached to upper and lower surfaces of the lip support to form a space for guiding the gas discharged from the plurality of through holes of the partition wall;

An air blowing slit formed parallel to the width direction of the steel sheet by the front end portions of the upper lip and the lower lip facing each other, for blowing the gas onto the steel sheet surface;

It is disposed on the surface facing the space of the lower lip and is movable along a moving path parallel to the width direction of the steel plate along the blowing slit, thereby attaching to the upper lip or lower lip during the plating deposition control operation of the air knife Lip cleaner to remove the solidified plating metal,

A driving device for moving the lip cleaner along the movement path,

The upper portion of the lip cleaner is configured to include a lip cleaner cover that covers the movement path of the lip cleaner.

This arrangement makes it possible to reduce local flow disturbances due to flow interferences in the slits from which gas is discharged.

In addition, according to the present invention, the lip cleaner may be configured such that the tip portion is divided into two parts and includes upper and lower bent portions that are bent upward and downward, respectively.

Through this configuration, it is possible to remove foreign substances such as molten metal around the tip of the upper and lower lip, thereby further reducing the flow disturbance.

In addition, according to the present invention, the lip cleaner includes a spring member, and the upper and lower bent portions of the lip cleaner can be configured to keep in close contact with the leading end of the upper and lower lip, respectively, by the elastic restoring force of the spring member. .

In such a configuration, the upper and lower bent portions of the lip cleaner are kept in close contact with the tip portions of the upper and lower lip to ensure that foreign matters such as molten metal of the tip portion are reliably removed.

In addition, according to the present invention, the lip cleaner cover can be configured to be inclined and fixed to be parallel to the stream line of the gas flowing out of the through hole of the partition wall toward the blowing slit.

In such a configuration, flow disturbance such as vortex does not occur in the flow of gas flowing from the chamber to the blower slit through the through hole of the partition wall, so that uniform gas injection to the steel sheet can be achieved.

Moreover, according to this invention, it can be comprised so that a rodless cylinder may be used as a drive for moving a lip cleaner.

With this configuration, the structure for moving the lip cleaner can be made simpler and can also be moved effectively.

Finally, according to the present invention, the lip cleaner can be configured to have a shape similar to a triangle that becomes thinner toward its tip.

Through this configuration, the movement of the lip cleaner can be made more smooth.

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

4 is a side view of one embodiment of an air knife according to the present invention.

Chambers 9, which are continuously supplied with gas by an external gas supply unit, which are not shown, are disposed on both left and right sides of the steel sheet, so that the gas is injected over the entire width of the steel sheet. It is formed larger than the width.

The chamber is continuously supplied with an inert gas such as air or nitrogen from a blower (not shown) or the like, whereby the inside of the chamber 9 is maintained at a constant pressure.

On the side facing the steel plate of the chamber 9, a lip support 14 having a partition wall having a plurality of through holes 12 communicating with the chamber is detachably attached, so that the gas inside the chamber is formed through the through holes ( 12).

The plurality of through holes 12 are preferably arranged such that the flow of gas exiting the chamber 9 is formed substantially uniformly.

Upper and lower lips 2 and 3 are detachably attached to upper and lower surfaces of the lip support 14, respectively. The front end portions of the upper and lower lips 2 and 3 face each other at regular intervals so as to form a blowing slit 11 through which the gas flowing out through the through hole is injected toward the steel sheet.

The gas discharged from the through hole 12 of the partition wall is guided to the blowing slit 11 through a space formed between the upper lip and the lower lip.

On the upper surface of the lower lip 2 facing the space, a lip cleaner 4 for removing foreign matter such as molten metal buried in the blowing slit 11 is disposed. The lip cleaner 4 is provided on the lower lip 3 along a moving path parallel to the width direction of the steel sheet. For example, as shown in FIG. 4, the movement path may be formed along a width direction of the lip support 14 to be a groove accommodating the base of the lip cleaner 4.

As shown in FIG. 4, the lip support 14 has a lip cleaner cover that covers the entire width of the lip support 14 such that the entire path of travel of the lip cleaner 4 is not exposed on the flow path. 6) is provided. The lip cleaner cover 6 is fixed at its one end to the lip support 14. The fixed side end 5 and the lip support 14 can be fixed on the lip support by, for example, a method of screwing by a bolt 13 or the like or by welding or the like. Here, the other end of the lip cleaner lid 6 may be disposed to be in contact with the thin plate portion 46 of the lip cleaner 4. Accordingly, the end of the lip cleaner lid 6 and the upper surface of the lower lip 3 form a gap 10 parallel to the movement path of the lip cleaner 4, and the thin plate portion 46 of the lip cleaner 4. ) Moves on the gap 10. Preferably, the lip cleaner cover 6 is inclined and fixed to be parallel to the streamline of the fluid flowing out of the through hole 12 and injected into the steel sheet through the blowing slit 11. It is good.

On the other hand, the upper part of the chamber 9 is equipped with a drive device 8 for moving the lip cleaner 4 along the width direction of the lip support 14 (direction perpendicular to the ground of FIG. 4).

As such a drive device, for example, a rodless cylinder 29 and a wire cable 21 are used. A configuration of moving the lip cleaner 14 using the rodless cylinder 29 is illustrated in FIG. 6, and the configuration thereof is as follows.

Both ends of the rodless cylinder 29 and the lip cleaner 4 are connected to each other by a wire cable 21 via a plurality of rollers. The wire cable 21 is guided by a pair of rollers 25, 26, 27 and 28, respectively, under constant tension. This wire cable 21 is secured to the lip cleaner 4 and the rodless cylinder 29 in a suitable manner. The air is supplied to the air inlet and outlet 23, and the air is removed from the air inlet and outlet 22 so that the rodless cylinder 29 moves to the left, and the lip cleaner 4 moves to the right. In the case where the lip cleaner 4 is to be moved to the left side, it is possible to control the supply of air on the contrary.

7, 8 and 9 show a preferred embodiment of a lip cleaner 4 according to the invention in detail.

The lip cleaner 4 includes a thin plate portion 46 having a thin thickness so as to protrude from the air blowing slit 11 and a base 47 for fixing the lip cleaner 4 to the lip support 14. The thin plate portion 46 has a shape similar to a triangle tapering toward the end of the blowing slit 11 side, the end of the chamber 9 facing the side of the blowing slit 11 is a compression spring 43 It is connected to the base 47 via a medium. Specifically, an opening 44 for inserting the spring 43 is formed at the end of the chamber 9 side of the thin plate portion 46, and a recessed portion in which the spring 43 is inserted is formed in the base 47. 48) is formed. The spring 43 is inserted into the recess 48 through the opening 44. In addition, a spring support 49 is bent at an end of the chamber 9 side of the opening 44, and the spring support 49 is a recess 48 when the thin plate 46 and the base 47 are assembled. Is inserted into the chamber 9 side end of the spring 43 to support the chamber 9 side end of the spring 43.

In the state where the thin plate portion 46 and the base 47 are assembled, the base plate 46 is formed so that the thin plate portion 46 can slide on the base 47 perpendicularly to the moving path direction of the lip cleaner 4. The thin plate fixing part 50 is covered to fix it, and then fixed to the base 47 by a suitable method such as welding.

In addition, as shown inside the circle B indicated by the dotted line in Fig. 4, the tip of the lip cleaner is divided into two parts and bent up and down, respectively, so as to contact the ends of the upper and lower lips (2, 3). It is good. That is, upper and lower bent portions 51 and 52 for removing the molten metal buried in the ends of the upper and lower lips 2 and 3 are formed at the end of the blowing slit 11 side of the thin plate portion 46, The upper and lower bent portions 51 and 52 are supported over the upper and lower lips 2 and 3, respectively, and the spring 43 inserted into the recess portion 48 as described above is attached to the spring support 49. The contact with the upper and lower lips 2 and 3 is maintained by the elastic restoring force applied. In this way, not only the molten metal blocking the blower slit, but also the molten metal buried in the tip portions of the upper and lower lip can be removed.

Meanwhile, an embodiment of a configuration in which the wire cable is fixed to the lip cleaner 4 is described below.

First, as shown in FIG. 10, the end of the wire cable 21 is inserted into a tube 54 made of a means for joining the wire cable, for example, metal, etc., and then the tube 54 is crimped. And so on.

On the other hand, as can be seen in Figure 9, the back of the lip cleaner 4 is provided with a recess 55 for mounting the wire cable, the diameter of the recess 55 is smaller than the diameter of the tube 54. In addition, the center of the recess 55 is provided with a tube fixing groove 53 whose diameter is slightly larger than the diameter of the tube 54, so that the tube 53 and the wire 21 are respectively the tube. It is inserted into the fixing groove 53 and the recessed portion (55). By configuring in this way, the wire cable 21 can be fixed so that it may not move with respect to the lip cleaner 4.

The operation of the present invention having the above configuration will be described.

The air knife 1 according to the present invention is arranged in left and right symmetrical structures on the left and right sides of the steel sheet so as to control the plating amount of the plating liquid remaining on the surface of the steel sheet proceeding in one direction through the bath in which the plating liquid in which molten metal is dissolved is stored. do.

In this state, the lip support 14 is disposed in the width direction of the steel sheet and continuously supplies an inert gas such as air or nitrogen from the gas supply source (not shown) into the chamber 9 via a blower or the like. The gas is uniformly discharged through the through hole 12 formed in the partition wall. The gas discharged in this way flows along the lip cleaner cover 6 disposed parallel to the stream line, and is discharged at high speed toward the steel sheet through the air blowing slit 11 formed by the tip portions of the upper and lower lips 2 and 3. do.

The gas discharged through the blower slit 11 hits the steel plate traveling in one direction and constantly controls the thickness of the plating liquid remaining therein.

On the other hand, during such a process, foreign matter by molten metal or the like is buried on the blowing slit 11 to cause flow disturbance. Therefore, the lip cleaner 4 must be reciprocated on the blowing slit 11 along the movement path at regular intervals or under the control of the user to remove foreign substances such as molten metal present in the blowing slit 11.

In detail, first, air is supplied to the air inlet and outlet 22, and the rodless cylinder 29 moves in the right direction of FIG. 6 by extracting air from the air inlet and outlet 23. As the rodless cylinder 29 moves to the right, the wire cable 21 connected thereto is moved on the rollers 25, 26, 27, and 28 by tension, so that the lip cleaner 4 of FIG. Will move to the left. When the rodless cylinder reaches the right limit point, air is supplied to the air inlet and outlet 23, and air is drawn out from the air inlet and outlet 22, whereby the rodless cylinder 29 moves to the left again. When the rodless cylinder 29 moves to the left side, the lip cleaner 4 moves to the right side again in a similar manner as described above, whereby foreign substances such as molten metal existing on the blower slit 11 are removed. will be.

According to the present invention as described above, since the wire cable for moving the lip cleaner is covered by the lip cleaner cover so that obstacles are removed on the flow path of the gas when the gas is discharged through the slit, as in the prior art. The plating deviation of the steel sheet due to the local flow disturbance caused by the flow interference in the slit from which the jet gas is discharged does not occur, thereby producing a plated steel sheet of excellent quality.

In addition, the end of the lip cleaner is bent up and down to contact the tip of the upper and lower lip, respectively, to remove not only impurities such as molten metal in the blowing slit, but also impurities around the slit. Further reduction.                     

In addition, since the lip cleaner is moved by the rodless cylinder, the lip cleaner can be effectively moved even by a simple structure, so that an advantageous effect can be obtained in structure and manufacturing cost.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to know that those who have knowledge of Easily know.

Claims (6)

A metal scattering device for controlling the plating amount of the metal for plating in the molten state attached to the surface of the steel sheet, A chamber through which gas is supplied from the outside, A lip support detachably attached to a side facing the steel plate of the chamber and having a partition wall having a plurality of through holes formed therein; An upper lip and a lower lip detachably attached to upper and lower surfaces of the lip support to form a space for guiding gas discharged from the plurality of through holes of the partition wall; An air blowing slit formed parallel to the width direction of the steel sheet by the front end portions of the upper lip and the lower lip facing each other, for blowing the gas onto the steel sheet surface; It is disposed on the surface facing the space of the lower lip is movable along the movement path parallel to the width direction of the steel plate, and provided with a tip portion protruding between the blowing slit, thereby the said during the plating amount control operation of the air knife Lip cleaner for removing the metal plating solidified on the upper lip or lower lip, A driving device for moving the lip cleaner along the movement path, At the top of the lip cleaner, a lip cleaner cover covering the movement path of the lip cleaner. The method of claim 1, The tip portion of the lip cleaner is divided into two parts, one portion is bent upwards to form an upper bent portion, the other portion is bent downwards to form a lower bent portion. The method of claim 2, The lip cleaner comprises a spring member, And said upper and lower bent portions of the lip cleaner tip maintain intimate contact with the tips of the upper and lower lips respectively by the elastic restoring force of the spring member. The method according to claim 1 or 2, And the lip cleaner cover is inclined to be parallel to a stream line of gas flowing out of the through hole of the partition wall and toward the blowing slit in the space. The method according to claim 1 or 2, And the drive device comprises a rodless cylinder and a wire cable connecting the rodless cylinder and the lip cleaner via a plurality of rollers. The method according to any one of claims 1 to 3, And the lip cleaner has a generally triangular shape that is tapered toward its distal end.

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