KR20080000908A - Apparatus for cleaning lip of air knife and air knife having the same apparatus - Google Patents

Abstract

A lip cleaning device, and an air knife thereof are provided to prevent axial plating variation of a plated steel plate, caused by instability of a discharged jet flow, by prohibiting inequality of a discharged gas jet flow by positioning the device out of a flow path for high-pressure gas inside the air knife. A lip cleaning device(1) comprises a zinc chip removing unit(10) and a powering unit(30). The zinc chip removing unit is inserted at a direction of a discharge port at an inside of an air knife(100) and installed and moved at a longitudinal direction of the air knife at an air discharge port(110) of the air knife which controls a plating adhesive degree of a plated steel plate, to remove a zinc chip(120) which is stuck to the discharge port. The powering unit is connected with the zinc chip removing unit at the inside of the air knife to move the zinc chip removing unit. The zinc chip removing unit and the power unit are positioned out of a high-pressure gas flow path of the inside for the air knife.

Description

Lip cleaning device and air knife having same {Apparatus for Cleaning Lip of Air Knife and Air Knife having The Same Apparatus}

1 is a perspective view showing a conventional galvanizing equipment

Figure 2 is a state diagram showing the state of attaching the lip (lip) of the scattered zinc chip during the plating amount control of the plated steel sheet using a conventional air knife

3 is a structural diagram showing the overall configuration of a lip cleaning device for an air knife according to the present invention

4 is a plan view of FIG.

5 is an exploded perspective view of FIG.

6 (a) to 6d are main parts showing various embodiments of zinc chip removing means in the apparatus of the present invention.

Figure 7 is an exploded perspective view showing a lip cleaning device of the present invention in another form

8 is a perspective view showing an air knife according to the present invention in a form different from the air knife according to the present invention having the cleaning apparatus shown in FIGS.

Explanation of symbols on the main parts of the drawings

1 .... Lip cleaning device 10 .... Zinc chip removal means

30 .... Driving means 32 ... Rail member

34 .. Moving object 36 .... Driving force transmission means

38,50 ... wire 54 ... screwbar

60 .... Cover member 100 .... Air knife

110 .... Air outlet 120 .... Zinc chip

130 .... Rib member 140 .... Frame member

150 .... Chamber 160 .... Lip Support

162 .... commutation wall 164,166 .... lip support

The present invention relates to an air knife (Air Knife), which is one of the steel plate plating equipment for plating molten metal such as zinc on the surface of the steel sheet, and more specifically, the lip cleaning device is provided with a built-in air knife to operate by zinc scattering chips While preventing defects, additionally, it is disposed outside the flow path of the high pressure air inside the air knife to prevent the unevenness of the discharge air (gas) jet flows by the device, thereby preventing the width plating deviation of the plated steel sheet due to instability of the discharge jets. The lip cleaning apparatus and the air knife having the same.

Among the cold-rolled steel sheets manufactured in steel mills, galvanized steel sheets for plating certain molten metals, in particular molten zinc, on the surface not only improve the corrosion resistance of the steel sheet, but also enhance the appearance of the steel sheet.

In particular, in recent years, such a plated steel sheet is being used as a steel sheet for electronic products or automobiles, and the development of technology for manufacturing high quality steel sheets is concentrated.

On the other hand, the plating process of such a steel sheet can be divided into a molten plating process for performing the plating by passing the steel plate through the plating bath in which the molten metal is stored, and an electroplating process using an electrolyte, usually galvanized steel sheet through the former process Produced.

For example, the production line of the galvanized steel sheet made of cold rolled coil is not shown in a separate drawing, but the coiled steel sheet released from the pay off reel is heat treated in a heat treatment furnace through a welder and a side looper. After adjusting the snout and the plating bath, adjust the proper amount of plating on the air knife.

Then, the plated steel sheet with the plated coating amount adjusted is cooled through an air cooling and water cooling system, and then the plated coating amount is measured by a cold guage, and then the shape correction and internal stress are removed from the temper rolling mill, and the chrome In order to further improve the corrosion resistance in the plating equipment, it is chemically processed, dried in the dryer, and passed through the exit looper and wound into a tension reel in the form of a coil to finally produce a coated steel sheet.

For example, as shown in FIG. 1, after the molten zinc 220 is fused to the surface of the steel sheet S while the steel sheet S passes through the galvanizing bath 210, the amount of plating attached is determined according to demand. In order to match the order of coating amount, zinc (A) (or inert gas may be used) is sprayed on both surfaces of the steel sheet from the air knife 200 installed above the hot water surface of the galvanizing bath 210 to appropriately coat the zinc coating amount. To be cut.

On the other hand, the adjustment of the coating amount of the steel sheet using such an air knife, when the steel plate is immersed in the plating bath, the amount of inflow molten metal attached to the surface and conveyed with the steel sheet, and the ability to scrape the inflow molten metal (wiping force) The amount of inflowing molten metal is determined by the balance between the friction force between the steel sheet and the molten metal and the earth gravity, and is known to increase functionally with the increase of the steel sheet progress speed.

In addition, the wiping force is determined by the collision pressure and shear stress generated when the air jets discharged through the air discharge port (typically a slit) of the air knife collide with the steel plate surface, and these values are determined between the air knife and the steel plate. Is controlled by the distance, the air discharge rate, and the gap between the upper and lower ribs.

Next, as shown in FIG. 1, the plating deposition amount of the steel sheet adjusted through the air knife is measured by the plating amount measurement gauge 230, and the feedback value is fed back so that the air discharge pressure or the steel sheet of the air knife 200 is fed back. (S) and the air knife is adjusted to control the plating adhesion amount of the plated steel sheet.

In this case, reference numerals 212 and 214 in FIG. 1 are sink rolls and stabilizing rolls for guiding the steel sheet, guiding its progress, and adjusting tension.

However, as shown in FIG. 2, the high pressure air (gas) from the air knife 200 is formed between the upper and lower lips 202 and 204 of the air knife 200. When sprayed through), the vortex (arrow) of air causes zinc dross or zinc particles (hereinafter referred to collectively as 'zinc chips') (zinc chip) d to the slopes of the ribs 202 and 204. The problem of growing in the air and clogging the discharge port may occur.

For example, as shown in Fig. 2, when the high pressure air is discharged from the discharge port 206 between the ribs, the outside is the dynamic pressure (+) and the inside is the negative pressure (-). Zinc chips (d) scattered by the vortex are attached to the lip discharge port and its surroundings, and in severe cases, the lip discharge port is blocked.

In addition, air vortices are aggravated by a flaw formed by a steel plate collision at the lip end of the air knife, and the adhesion of zinc chips to the surfaces of the lip 202 and 204 and the discharge port 206 is deepened.

At this time, the air pressure passing through the portion where the zinc chip is attached (fixed) at the discharge port is lowered, and the air vortex is increased while uniform air discharge is not performed in the width direction of the steel sheet, and thus, the surface of the steel sheet has a joule mark or the like. Is generated.

Therefore, the zinc chips d attached to the upper and lower lips 202 and 204 of the air knife 200 and the discharge holes 206 adversely affect the plating quality of the steel sheet, and thus should be removed periodically.

For example, although not shown in a separate drawing, conventionally, a worker removes zinc chips attached manually by using a thin plate or a rod installed with a needle that can enter an air outlet, but the work space is hot (plating bath). The zinc solution temperature is 460 ℃) occurs where there is a high risk of safety accidents due to the steel plate is in progress.

On the other hand, other conventional lip cleaning device (air knife cleaning device) for solving the problems caused during the manual work is disclosed in Korean Patent Publication No. 1998-0004722, and Korean Patent Application Publication No. 1998-0045949 and 1999-0017039. .

That is, the air knife cleaning devices disclosed in the above-described Patent Publications and Utility Model Publications are intended to remove zinc chips attached to the ejection openings in the ribs or between the ribs by mechanical operation without a manual operation of an operator.

However, these conventional lip cleaning devices are external type installed outside of the air knife, so that zinc chips scattered during actual line operation can be attached to enable operation for only a short time of initial operation, and after that, operation is impossible. There was a problem.

Accordingly, the air knife is built-in type which effectively removes zinc chips attached to the discharge port without causing flow disturbance of the air jets discharged from the lip discharge port of the air knife, and in particular, is disposed away from the flow path of the internal high pressure air, and thus is disposed in the cleaning apparatus. There has been a need for a lip cleaning device that prevents flow disturbance caused by flow.

The present invention has been made in order to solve the above-mentioned conventional problems, the object is that the lip cleaning device is provided with a built-in air knife type lip cleaning to prevent the malfunction caused by zinc scattering chips to extend the service life of the lip cleaning device An apparatus and an air knife having the same are provided.

In addition, another object of the present invention is that the lip cleaning device is built-in air knife, and in particular, arranged outside the flow path of the high-pressure air inside the air knife to prevent the unevenness of the discharge air (gas) jet flow by the device to prevent the unstable discharge jet flow The present invention provides a lip cleaning device for preventing a widthwise plating deviation of a plated steel sheet and an air knife having the same.

As one technical aspect for achieving the above object, the present invention is moved in the longitudinal direction of the air knife in a state inserted in the discharge port direction in the interior of the air knife to the air discharge port of the air knife for adjusting the coating amount of the plated steel sheet Zinc chip removal means installed to remove zinc chips attached to the discharge port at least; And,

Driving means installed in association with the zinc chip removing means in the air knife to move the zinc chip removing means;

It provides a lip cleaning device consisting of a built-in air knife.

More preferably, the driving means installed in the interior of the knife and the zinc chip removal means is to be disposed away from the high-pressure air flow path inside the air knife.

In addition, the zinc chip removal means is preferably connected to the drive means while being composed of one of a plate member of a predetermined width, a predetermined diameter needle and a brush inserted into the air discharge port.

On the other hand, the plate material of the zinc chip removing means preferably further comprises an abrasion-resistant layer formed in a portion in contact with the lip member of the air discharge port.

Preferably, the driving means is disposed inside the device seating portion provided in the lip member forming the air discharge port of the air knife, and is disposed outside the flow path of the high pressure air.

At this time, the device seating portion may be provided as a groove formed in a straight concave in the longitudinal direction of the air knife in the lower lip member of the upper and lower lip member forming the air discharge port.

In addition, preferably, the driving means, the movable body to which the zinc chip removal means is connected and fixed while seated on the rail member installed in the device seating portion formed in the lower lip member, and transfers the driving force from the outside of the air knife while being connected to the movable body It may be configured to include a driving force transmission means configured so.

Preferably, the driving force transmitting means is driven by a driven pulley installed on both sides of the device seat and driven in an endless track, and a driven wire connected to the movable body, and a connection pulley fixed to a driving shaft connected to the driven pulley and passing through a lip member. And a drive wire fastened between the drive pulley of the drive motor installed at the chamber or the frame side of the air knife.

Or, the driving force transmission means, driven by the driven pulleys on both sides of the device mounting portion driven by the endless track and connected to the moving body, and the drive shaft and the air knife chamber or frame connected to the driven pulley and passing through the lip member It is also possible to consist of a gear assembly connected between the drive motor installed on the side and the joint members therebetween.

Or preferably, the drive force transmission means, a screw bar that is fastened through the moving body and supported by the bearing blocks on both sides of the device mounting portion, and a gear bundle connected between the screw bar and the drive motor installed on the chamber or frame side and its It may be composed of joint members therebetween.

Here, it is more preferable that the cover member which prevents the flow disturbance of the high pressure air is further covered on the upper portion of the device seating portion formed on the lower lip member on which the driving means is seated.

Next, as another technical aspect of the present invention, the lip cleaning device;

Upper and lower lip member is built in the lip cleaning device and constituting the air discharge port for adjusting the plating deposition amount of the plated steel sheet; And,

A chamber associated with the upper and lower lip members and fixed to the frame and to which high pressure air is supplied;

It can provide an air knife having a lip cleaning device configured to include.

In addition, as another technical aspect the present invention in another embodiment. The lip cleaning device;

Upper and lower lip member is built in the lip cleaning device and constituting the air toe outlet for controlling the coating amount of the plated steel sheet; And,

A lip support installed between the upper and lower lip members and the chamber fixed to the frame, the lip support being configured to maintain the strength of the air knife while the high pressure air passes therethrough;

Provided is an air knife having a lip cleaning device.

In this case, preferably, the lip support is formed with a plurality of through holes through which the high pressure air passes, the rectifying wall having a predetermined thickness for maintaining the strength while uniformly discharging the air, and the upper and lower sides of the rectifying wall. The lower lip member and the chamber may be composed of a lip support, each of which is firmly fixed.

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

First, in FIGS. 3 to 5, the lip cleaning device 1 for an air knife according to the present invention is shown as a structural diagram or an exploded perspective view.

That is, as shown in Figures 3 to 5, the lip cleaning device 1 of the present invention, the inside of the air knife to the air discharge port 110 of the air knife 100, which greatly regulates the plating deposition amount of the plated steel sheet The zinc chip removing means 10 and the zinc chip removing means 10 which move in the longitudinal direction of the air knife in the inserted state toward the discharge port to remove the zinc chip 120 attached to the discharge port 110 at least. It is characterized in that it is provided as a built-in air knife including a drive means 30 installed in conjunction with the zinc chip removal means in the air knife.

In particular, the drive means 30 additionally provides other constituent features which are arranged off the flow path P of the high pressure air flowing inside the air knife 100.

That is, the lip cleaning device 1 for air knives of the present invention is characterized by its constitutive feature in that it is built-in air knife provided in the air knife and does not interfere with the flow of high-pressure air to cause disturbance.

Therefore, the lip cleaning device of the present invention solves the problem that the device cannot be operated due to zinc chips (such as molten zinc, zinc scattering particles, etc.) which are conventionally scattered when the external lip cleaning devices are actually operated.

In particular, the lip cleaning apparatus 1 of the present invention enables the reciprocating movement of the zinc chip removing means 10 having a predetermined width or diameter for removing the zinc chip 120 at the air discharge port 110 between the lip members. By arranging the drive means 30 away from the flow path P of the high pressure air flowing inside the air knife, the plated steel sheet is ultimately prevented from generating any flow disturbance by the cleaning device, in particular, the drive parts during air discharge. Its characteristics are that prevented defects.

At this time, the zinc chip removal means 10 will be described in more detail in FIG. 6, but at least an air discharge port formed between the end of the upper lip member 130a and the lower lip member 130b of the air knife 100 ( 110 may be a thin metal plate or needle or brush (not shown) having a thickness (or diameter in the case of a needle), and at least a zinc chip (zinc chip) attached to the air outlet of the lip member may be removed. Of course, it should have a degree of strength.

Next, as shown in Figures 3 to 5, the zinc chip removal means 10 of the present invention is linked to the air discharge port of the lip member to the zinc chip removal means 10 without the manual operation of the operator even during operation of the air knife The driving means 30 for moving in the longitudinal direction of the air knife in the lip member 130, that is, the upper lip member 130a and the lower lip member 130b forming the air outlet 110 of the air knife Seated on the device mounting portion 132 formed in the member 130b is disposed away from the flow path (P) of the high pressure air.

That is, as shown in Figures 3 and 5, the device seating portion 132 is a groove (groove) formed in the lower lip member (130b) to be recessed in a straight line in the longitudinal direction of the air knife in close proximity to the air discharge port (groove) It can be formed as.

Of course, although not shown in a separate drawing, the device seating portion 132 is formed in the upper lip member (130a) and arranged the drive means 30 and the zinc chip removal means 10 in the form of bent form the air outlet It may be possible to remove the zinc chip 120 by being inserted into the 110.

On the other hand, in the air cleaning lip cleaning device 1 of the present invention, as shown in Figs. 3 to 5, the drive means 30, the rail is provided on the device seating portion 132 formed in the lower lip member (130b) The movable body 34 to which the zinc chip removing means 10 is connected and fixed while seated on the member 32, and the driving force transmitting means 36 connected to the movable body 34 and configured to transmit driving force from outside the air knife. It consists of.

That is, the zinc chip removing means 10 which substantially removes the zinc chip 120 attached to the air outlet 110 is fixedly connected to the moving body 34 of the driving means 30, and the driving means 30 is Out of the air flow path, the movable body 34 is connected to the driving force transmission means 36 to reciprocate in the longitudinal direction of the lower lip member from the rail member 32 on the device seat, and eventually to a thin plate or the like. The zinc chip removal means 10 moves along the air discharge port to remove the zinc chip.

At this time, as shown in Figure 4, since the width of the zinc chip removing means 10 is a predetermined length, the inside of the air knife is waiting in the free space on both sides of the air knife longer than the maximum width of the steel sheet It is not provided as a source of disturbance in the flow of high pressure air.

On the other hand, the driving force transmission means of the present invention may be provided in various forms, as shown in Figures 3 and 5, the driving force transmission means 36 of the present invention of the first form, driven pulleys on both sides of the device seat The connection pulley 44 fixed to the driving shaft 42 passing through the lip member while being connected to the driven wire 38 and the driven pulley 40 to which the movable body 34 is connected while being supported by the 40 is driven in an endless track. And a drive wire 50 fastened between the drive pulley 48 of the drive motor 46 installed on the chamber or frame side of the air knife.

Therefore, when the driving motor 46 disposed on the back of the chamber or on the frame is operated by operation in an air knife operation control panel (not shown) so as to be less affected by heat, the driving pulley 48, the connecting pulley 44, and the driven pulley are operated. As 40, the drive wire 50 and the driven wire 38 which are cooperatively driven are driven.

As a result, the movable body 34 whose front and rear surfaces are connected and fixed to the driven pulley 48 which operates in an endless track, that is, the movable body 34 formed with the lay member seating portion 34a at the lower portion of the square block is driven by the driven wire. Accordingly, the air knife reciprocates in the longitudinal direction.

Of course, the drive motor 46 is driven in accordance with the length of the air knife in the forward and reverse rotation is set in advance to control the reciprocating length of the moving body or its speed.

At this time, the drive shaft 42, in which the connection pulley 44 and the driven pulley 40 are installed, is assembled in a state of maintaining airtight through the bearing 42a through the bottom of the device seating portion of the lower lip member 130b. Is rotated.

On the other hand, as shown in Figures 3 and 5, the cover member 60 of the thin plate in the longitudinal direction of the lower lip member on the upper portion of the device seating portion 132, the lip cleaning device 1 of the present invention is disposed It is provided with a size that can cover the entire device seating portion.

Therefore, the high-pressure air supplied from the chamber side passes through the cover member 60 without any obstructive parts on the flow path thereof and is removed from the zinc chip 120 attached to the air discharge port by the zinc chip removing means 10. It can be discharged very uniformly, which in turn makes the zinc plating adhesion of the steel sheet uniform in the width direction of the steel sheet to improve the plating quality, and also prevent the waste of the cost due to overplating with precise plating.

Next, FIG. 6 shows various embodiments of the zinc chip removing means 10 of the lip cleaning apparatus 1 of the present invention.

That is, as shown in Figure 6a, provided with a needle (10 ') of a predetermined diameter inserted corresponding to the air discharge port 110 of the air knife 100, or a plate shape of a predetermined width, as shown in Figures 6b and 6c 10 may be provided.

At this time, as shown in Figure 6c, the both sides of the front end of the plate material is in contact with the lip member surface of the air discharge port 10a for removing the adhesion zinc chip, for example, ceramic or tungsten excellent in heat resistance The formation of a titanium layer may be preferable since it will increase the metal chip removal efficiency and extend the service life.

Alternatively, as shown in FIG. 6D, it may be possible to provide a zinc chip removing means 10 ″ having a tip portion 10 b for removing the zinc chips adhered to the outer surface of the air outlet of the lip member.

Next, FIG. 6 illustrates a driving force transmission means 36 ′ of another embodiment of the present invention, which is supported by driven pulleys 40 on both sides of the device seat and driven in endless tracks, while the moving wire 34 is connected to the driving wire. (38) and the joint member (49) connected in multiple stages between the driven shaft (42) passing through the lip member while being connected to the driven pulley (40) and the driving motor (46) installed on the chamber or frame side of the air knife. And gear bundle 49a.

Therefore, when the drive motor on the chamber or frame side is driven, several gear bundles and joint members are driven to move the moving body 34 on the rail member according to the endless orbital movement of the driven wire. Remove the metal chip 120 on the top.

At this time, as shown in Figures 3 and 6, it is preferable to provide a cover 43 to the portion of the driving force transmission means disposed outside the lip member so that the metal chip is not scattered.

Next, Fig. 7 shows another type of driving force transmitting means 36 "in the lip cleaning apparatus of the present invention, which is another type of driving force transmitting means of the present invention is fastened to the movable body 34, Multi-stage joint member 56 and gear bundle 56a connected between the screw bar 54 supported by the bearing block 52 on the seating part, and the drive motor installed on the screw bar 54 and the chamber or frame side. It can be configured as.

Therefore, when the drive motor (46 of FIG. 4) installed on the chamber or the frame side is driven, the joint member 56 is driven and the screw body 54 is driven to rotate through the gear bundle 56a. Move along the rail member 32.

As a result, the lip cleaning apparatus 1 of the present invention can select various types of driving force transmission means 36, 36 ', 36 "to operate the apparatus.

Next, with reference to the air knife 100 including the lip cleaning device 1 described so far, the air knife 100 including the lip cleaning device 1 of the present invention is largely the image of FIGS. The lower lip member and the chamber may be connected to each other and may be in the form of an air knife having a separate lip support as shown in FIG. 8.

That is, the air knife of the present invention of the first aspect is provided with the lip cleaning device 1, wherein the cleaning device 1 is built-in and constitutes an air discharge port 110 for adjusting the coating amount of the plated steel sheet, The lower lip member 130a, 130b, and the chamber 150 is connected to the upper and lower lip member (130a) (130b) and fixed to the frame 140.

Therefore, the high pressure air supplied through the air supply pipe (not shown) of the air or gas connected to the chamber 150 is discharged at a predetermined discharge pressure according to the space of the air outlet 110 in the space between the chamber and the upper and lower lip members. The zinc chip removing means 10 of the lip cleaning device is moved along the air discharge port to remove the zinc chips without causing a disturbance of air.

Next, as shown in Figure 8, the air knife of another embodiment of the present invention, the lip cleaning device (1) of the present invention is built and constitutes an air discharge port 110 for adjusting the plating deposition amount of the plated steel sheet The upper and lower lip members 130a and 130b and the upper and lower lip members 130a and 130b are installed in connection with the chamber 150 fixed to the frame 140 and are composed of an air knife strength retainer and It may be composed of a lip support 160 through which air passes.

At this time, the lip support 160, a plurality of through-holes (162a) through which the high-pressure air is formed is configured to uniformly discharge the air, but the rectifying wall 162 of a predetermined thickness to maintain the strength, and the rectification The upper and lower lip members and the chamber may be configured to be lip support parts 164 and 166 fixed to upper and lower sides of the wall 162, respectively.

Therefore, the lip support 160 in the air knife of another form of the present invention serves to maintain the strength of the air knife while having a predetermined thickness to connect the upper and lower lip members to the chamber 150 in FIG. Therefore, it is characterized by avoiding difficulties in manufacturing or operating the air knife due to maintaining the strength of the chamber.

In addition, the rectifying wall 162 of the lip support 160 is formed with air passing holes 162a arranged in a predetermined shape so that the high pressure air such as air or gas supplied through the chamber can be uniformly discharged from the air outlet 110. It is possible to discharge through.

At this time, in the air knife 100 of the present invention, since the device seating portion 132 is provided on the lower lip member 130b side, the thickness of the lower lip member does not cause vibration or the like during the adjustment of the plating amount, and the chamber or the lip support Of course, the thickness or strength should be adjusted to maintain a firmly fixed state.

In the air knife of the present invention, it is preferable that the driving means 30 in the lip cleaning device 1 reduce the weight of the lower lip member by using a light weight component.

As a result, the air bag 100 of the present invention allows the zinc chip 120 attached to the lip discharge port to be uniformly controlled in the width direction of the steel plate without causing any air flow disturbance while the air knife is operating. do.

According to the lip cleaning device of the present invention and the air knife having the same, as described above, since some driving parts are built in the interior of the air knife and some driving parts are covered with a cover, zinc chips scattered during actual operation are not attached to the driving part. Therefore, it is possible to use for a long time, so that the operation and maintenance of the device is smooth.

Second, while easily removing the zinc chips attached to the ejection openings between the air knife lip, at the same time, the air jets uniformly discharged in the steel plate width direction without local flow disturbance by the device are uniformly maintained in the steel plate width direction By preventing plating defects such as wrinkles generated during plating, the plating adhesion is adjusted, and the plating quality is improved.

Finally, it is automatically operated without the worker's manual operation so that no safety accidents of the worker occurs.

While the invention has been shown and described in connection with specific embodiments so far, it will be appreciated that the invention can be varied and modified without departing from the spirit or scope of the invention as set forth in the claims below. It will be appreciated that those skilled in the art can easily know.

Claims (14)

Zinc chip removal means for removing zinc chips attached to the discharge port, at least installed in the air discharge port of the air knife for controlling the coating amount of the plated steel plate to move in the longitudinal direction of the air knife while being inserted in the discharge port direction from the inside of the air knife ; And, Driving means installed in association with the zinc chip removing means in the air knife to move the zinc chip removing means; Lip cleaning device consisting of a built-in air knife, including. The lip cleaning apparatus according to claim 1, wherein the driving means installed in connection with the zinc chip removing unit and the air knife is disposed away from the high pressure air flow path inside the air knife. The lip cleaning apparatus according to claim 1, wherein the zinc chip removing unit is connected to the driving unit while being configured as one of a plate member having a predetermined width inserted into the air outlet, a needle having a predetermined diameter, and a brush. 4. The lip cleaning apparatus according to claim 3, wherein the plate material of the zinc chip removing means further comprises an abrasion-resistant layer formed at a portion in contact with the lip member of the air discharge port. 3. The lip cleaning device according to claim 2, wherein the driving means is disposed inside the device seating portion provided in the lip member forming the air discharge port of the air knife, and is disposed outside the flow path of the high pressure air. 6. The lip cleaning apparatus according to claim 5, wherein the device seating portion comprises grooves formed in the longitudinal direction of the air knife in the lower lip member of the upper and lower lip members forming the air discharge port. The method of claim 2, wherein the driving means, A movable body to which the zinc chip removing unit is connected and fixed while seated on a rail member installed in a device seating portion formed on a lower lip member; And, Driving force transmission means associated with the movable body and configured to transmit driving force from an outside of an air knife; Lip cleaning device, characterized in that configured to include. The driving force transmission device of claim 7, wherein the driving force transmission means is supported by driven pulleys installed on both sides of the device seat and driven in an endless track, and is connected to the driven wire connected to the movable pulley, and fixed to a driving shaft passing through the lip member while being connected to the driven pulley. Lip cleaning device comprising a drive wire fastened between the connection pulley and the drive pulley of the drive motor installed on the chamber or frame side of the air knife. The driving force and the air knife of claim 7, wherein the driving force transmitting means is driven by the driven pulleys on both sides of the device seat and driven in an endless track, and the driven wire connected to the movable body and the driving shaft and the air knife connected to the driven pulley. Lip cleaning device, characterized in that consisting of a gear unit and a joint member connected between the drive motor installed on the chamber or frame side of the. 8. The method of claim 7, wherein the drive force transmission means is a screw bar that is fastened through the moving body and supported by both bearing blocks of the device mounting portion, and a gear bundle connected between the screw bar and the drive motor installed on the chamber or frame side; Lip cleaning device characterized in that composed of joint members therebetween 6. The lip cleaning apparatus according to claim 5, wherein a cover member for preventing flow disturbance of the high pressure air is further covered on an upper portion of the device seating portion formed in the lower lip member on which the driving means is seated. A lip cleaning device according to any one of claims 1 to 11; Upper and lower lip member is built in the lip cleaning device and constituting the air discharge port for adjusting the plating deposition amount of the plated steel sheet; And, A chamber associated with the upper and lower lip members and fixed to the frame and to which high pressure air is supplied; Air knife having a lip cleaning device configured to include. A lip cleaning device according to any one of claims 1 to 11; Upper and lower lip member is built in the lip cleaning device and constituting the air discharge port for adjusting the plating deposition amount of the plated steel sheet; And, A lip support installed between the upper and lower lip members and the chamber fixed to the frame, the lip support being configured to maintain the strength of the air knife while the high pressure air passes therethrough; Air knife having a lip cleaning device composed of. The method of claim 13, wherein the lip support, A rectifying wall having a plurality of through-holes through which the high pressure air passes and having a predetermined thickness for maintaining strength while uniformly discharging air; And, A lip support portion to which upper and lower lip members and a chamber are firmly fixed to upper and lower sides of the rectifying wall, respectively; Air knife, characterized in that consisting of.

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