FORM 2

THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See section 10 and rule 13)
1. Title of the Invention
DEVICE FOR REMOVING TOP DROSS OF PLATING POT
2. Applicant(s)
Name Nationality Address
POSCO Korean 6261 Donghaean-ro, Nam-gu, Pohang-si Gyeongsangbuk-do 37859, Republic of Korea
3. Preamble to the description
The following specification particularly d escribes the invention and the manner in which it is to be performed
[DESCRIPTION] [Technical Field]
The present invention relates to a device for removing top dross of a plating pot, and more particularly, to a device for removing top dross of a plating pot which automatically removes dross which is floating on a break surface of the plating pot during a continuous hot-dip galvanizing process.
[Background Art]
A steel sheet is continuously thermally processed in a heating furnace to remove residual stress and is hot-dip galvanized in a plating pot while remaining at an adequate temperature. The steel sheet passes through a sink roll and a stabilizing roll provided at the plating pot and then passes by an air knife disposed above the plating pot. A plating rate of the steel sheet is adjusted to be a plating rate needed by a consumer through the air knife.
When the steel sheet passes through the air knife, top dross that is a zinc oxide is formed on a molten surface of the plating pot as well as zinc spattering due to high-pressure gas jetted from the air knife and an oxidation on a melted galvanizing layer attached to a surface of the steel sheet. Since surface defects such as dross dents are caused when the top dross is attached to the surface of the steel sheet being transferred, it is very important to effectively remove the top dross.
Korean Patent Publication No. 2014-0084778 (July 07, 2014, hereinafter, referred to as a present document) discloses a device which automatically removes top dross.

The top dross removal device of the present document is installed at a frame of a plating pot and removes top dross using a method of automatically pushing and collecting the top dross. However, the above top dross removal device has a limitation in a top dross removal operation due to a narrow space between a snout and an air knife.
Also, a method of removing top dross using a magnetic wheel is provided. A top dross removal device which includes a magnetic wheel is a device which collects or moves top dross floating on a molten surface of a plating pot using a magnetic force generated while the magnetic wheel rotates.
However, the above-described top dross removal device has a problem in which a motor and a control module may malfunction or be thermally damaged. This is because a top of the molten surface of the plating pot, at which the top dross removal device is installed, is in an environment of a high-temperature of 450 °C or higher. When top dross of a plating pot is not effectively removed, the dross may be disposed between a steel sheet and a sink roll or re-adhered to a surface of the steel sheet and may generate defects on a plating surface.
To prevent this, a cooling device for the motor and the control module is additionally necessary. However, in consideration of a narrow space near the plating pot, the additional cooling device is a very inefficient configuration and a problem of complicated facilities occurs.

[Disclosure of Invention] [Technical Problem]
The present invention is directed to providing a device for removing top dross of a plating pot, which is capable of automatically removing top dross of a plating pot without a manual operation of a worker.
The present invention is directed to providing a device for removing top dross of a plating pot, which is capable of preventing thermal damage and a failure in driving even in a high-temperature environment of a plating pot.
The present invention is directed to providing a device for removing top dross of a plating pot, which is capable of embodying a cooling configuration without an additional cooling device.
Aspects of the present invention are not limited to the above-stated aspects and other unstated aspects can be clearly understood by those skilled in the art from the following description. [Technical Solution]
One aspect of the present invention provides a device for removing top dross of a plating pot, including an air supply portion and an air jet portion which is connected to the air supply portion, is disposed on a molten surface of the plating pot, and includes a plurality of jet nozzles.
The plurality of jet nozzles may be arranged to be laterally and longitudinally aligned.
The air jet portion may include a jet plate which is connected to the air
supply portion and at which the jet nozzles are formed.
The jet nozzles may include transfer nozzles and collection nozzles, and the collection nozzles may be disposed outside the transfer nozzles at an outermost part among the transfer nozzles on the basis of a lateral direction.
The collection nozzles may have a cross-sectional area which increases in a jet direction.
The transfer nozzles may each include a jet hole and a jet slit, and a cross-sectional area of the jet slit may be greater than that of one jet hole.
The jet slit is disposed below the jet hole located at a lowermost end among a plurality of such jet holes on the basis of a height direction of the plating pot.
A cross-sectional area of the collection nozzle may be formed to be greater than the cross-sectional area of the jet hole.
The collection nozzle may be formed to allow the jet direction to face a center of the jet plate on the basis of the lateral direction.
An inner wall of the collection nozzle may be formed to tilt toward the center of the jet plate on the basis of a reference line which faces frontward.
The jet plate may include a division plate which is installed therein and at which a plurality of division holes are formed.
The device may further include a moving portion which is connected to the air jet portion and moves the air jet portion.
The moving portion may include a support disposed above the plating pot, a transfer bogie movably coupled to the support, and a driving portion installed on the transfer bogie and coupled to the support to transmit power thereto.
The jet plate may be coupled to the transfer bogie to tilt.
A slot may be formed at the transfer bogie, and the jet plate may be disposed below the transfer bogie. Also, the jet plate may include a lever which is formed on a top thereof and passes through the slot, and the transfer bogie may include a tilting driving portion which is disposed on a top surface thereof, is connected to the lever, and reciprocates.
The tilting driving portion may include a rail formed at the top surface of the transfer bogie in the second direction and a tilting angle changing bogie which is slidably coupled to the rail and at which a lever connection portion inserted into the lever is formed.
The driving portion may include a motor, a rack gear coupled to a rotating shaft of the motor, a motor case which includes the motor therein, and a motor support which supports the motor case, and the support may include a rack bar which is formed along the second direction and is engaged with the rack gear.
The motor support may be coupled to the tilting angle changing bogie.
The motor case may form a cooling space therein, and the cooling space may communicate with the air supply portion and an inside of the jet plate.
The lever may include an air flow path which is formed therein and communicates with the cooling space of the motor case and the jet plate.
[Advantageous Effects]
According to one embodiment of the present invention, a device is configured to remove top dross of a plating pot using high-pressure air supplied Through a plurality of jet nozzles and provides an advantageous effect of stably removing top dross of a plating pot without thermal damage and a failure in driving even in a high-temperature environment.
Also, according to one embodiment of the present invention, a device is configured to allow a plurality of jet nozzles arranged to be aligned to uniformly jet high-pressure air such that an advantageous effect of effectively collecting or moving top dross is provided.
Also, according to one embodiment of the present invention, a division plate at which division nozzles are formed is installed in a jet plate to separate an air flow which moves top dross from an air flow which collects top dross such that an advantageous effect of maximizing efficient utilization of air is provided.
Also, according to one embodiment of the present invention, jet nozzles are separately formed as transfer nozzles and collection nozzles and an air flow of the collection nozzles is greater than an air flow of the transfer nozzles and simultaneously the collection nozzles are arranged outside the transfer nozzles such that an advantageous effect of more effectively collecting and transferring top dross is provided.
[Brief Description of Drawings]
FIG. 1 is a view illustrating a device for removing top dross of a plating pot according to one exemplary embodiment of the present invention,
FIG. 2 is a view illustrating a jet plate of an air jet portion shown in FIG. 1, FIG. 3 is an exploded view of the jet plate, FIG. 4 is a view illustrating jet nozzles,
FIG. 5 is a view illustrating an airflow in the jet plate,
FIG. 6 is a view illustrating an airflow at a bottom of the jet plate,
FIG. 7 is a view illustrating an airflow discharged toward a front and a rear of the jet plate.
FIG. 8 is a view illustrating airflows discharged from a transfer nozzle and a collection nozzle,
FIG. 9 is a view illustrating a shape of a front surface and a shape of a rear surface of the jet plate,
FIG. 10 is a view illustrating a state in which top dross is collected and moved,
FIG. 11 is a view illustrating a lever,
FIG. 12 is a view illustrating a moving portion,
FIG. 13 is a view illustrating the device for removing top dross of a plating pot, to which air is supplied before the device moves,
FIG. 14 is a view illustrating a state in which the jet plate tilts after air supply,
FIG. 15 is a view illustrating a state of the air jet portion before tilting,
FIG. 16 is a view illustrating a state in which a moving portion moves forward such that the air jet portion tilts, FIG. 17 is a view illustrating a state in which the moving portion moves backward such that the air jet portion tilts,
FIG. 18 is a view illustrating a state in which the moving portion continuously moves so that the air jet portion is moved,
FIG. 19 is a view illustrating another embodiment of the moving portion,and
FIG. 20 is a view for comparing embodiments of the moving portion. [Mode for Invention]
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the attached drawings. The purpose, particular advantages, and novel features of the present invention will be more clearly understood from the following detailed description and exemplary embodiments related to the attached drawings. Also, the terms used in the specification and the claims should not be limited to general or lexical meanings and should be interpreted as meanings and concepts coinciding with the technical concept of the present invention on the basis of a principle in which the inventor can appropriately define the concept of the terms to describe the invention in the best manner. Also, a detailed description on well-known related art that may unnecessarily obscure the essential of the present invention will be omitted.
The terms including ordinal numbers such as “second,” “first,” and the
like may be used for describing a variety of components. However, the components are not limited by the terms The terms are used only for
distinguishing one component from another component. For example, without departing from the scope of the present invention, a second component may be referred to as a first component, and similarly, a first component may be referred to as a second component. The term “and/or” includes any and all combinations of one or a plurality of associated listed items.
FIG. 1 is a view illustrating a device for removing top dross of a plating pot according to one exemplary embodiment of the present invention. As described above, FIG. 1 clearly illustrates only significantly featured parts to allow the present invention to be clearly conceptually understood such that a variety of illustrations are expected and the scope of the present invention should not be limited by a particular shape shown in the drawing.
Referring to FIG. 1, a device for removing top dross of a plating pot according to an exemplary embodiment of the present invention may include an air supply portion 100, an air jet portion 200, and a moving portion 300.
The device for removing top dross of a plating pot may be installed at a top of a plating pot. Since the plating pot is surrounded by a high-temperature environment of 460 °C, a worker is exposed to a very dangerous working environment and workplace accidents may frequently occur. However, it is possible to easily remove top dross using the top dross removal device.
The air supply portion 100 provides the air jet portion 200 with high-pressure air for removing top dross. The air jet portion 200 jets the air supplied by the air supply portion 100 to a molten surface of the plating pot. The moving portion 300 adjusts a position of a jet of air for collecting and moving the top dross by moving the air jet portion 200.
FIG. 2 is a view illustrating a jet plate of the air jet portion shown in FIG. 1, FIG. 3 is an exploded view illustrating the jet plate, and FIG. 4 is a view illustrating jet nozzles.
Referring to FIGS. 1 to 3, the air jet portion 200 may include a jet plate 220 with a jet nozzle 210 formed therein.
Referring to FIG. 4, a plurality of such jet nozzles 210 may be formed. Also, the plurality of jet nozzles 210 may be aligned and arranged in a lateral direction. Here, the lateral direction may correspond to a width direction (a y-axis direction) of the plating pot. Also, the plurality of jet nozzles 210 may be aligned and arranged in a longitudinal direction. Here, the longitudinal direction may correspond to a height direction (a z-axis direction) of the plating pot.
Since the plurality of jet nozzles 210 are dispersed in the width direction (the y-axis direction) and the height direction (the z-axis direction) of the plating pot, the air jet portion 200 may uniformly jet air to the molten surface.
Particularly, the jet nozzle 210 may include a transfer nozzle 211 and a collection nozzle 212.
The transfer nozzle 211 embodies an airflow for transferring top dross and may be formed throughout a front surface 221 and a rear surface 222 of the jet plate 220. In detail, the transfer nozzle 211 may be divided into a circular jet hole 211a and a long-hole-shaped jet slit 211b. A part in which the circular jet hole 211a is formed may be embodied as a perforated plate through which air is minutely discharged.
The long-hole-shaped jet slit 211b is formed at a bottom of the front surface 221 of the jet plate 220 and may introduce airflow which thrusts away top dross floating on the molten surface. A cross-sectional area of one jet slit 211b which determines a flow rate of discharged air may be formed to be larger than a cross-sectional area of one jet hole 211a.
The collection nozzle 212 may be disposed outside the transfer nozzle 211,at an outermost part on the basis of the lateral direction (the y-axis direction of FIG. 4) among the plurality of transfer nozzles 211. That is, the collection nozzles 212 may be formed on both sides of the front surface 221 and the rear surface 222 of the jet plate 220. Also, the collection nozzle 212 may be embodied as a long-hole-shaped slit which is long in the longitudinal direction.
Accordingly, an airflow amount of the collection nozzles 212 is relatively greater than an airflow amount of the transfer nozzle 211 near both sides of the front surface 221 of the jet plate 220.
Referring to FIG. 3, the jet plate 220 may be embodied as a hexahedral shape having a certain width and height. The jet plate 220 may be embodied as a hollow shape with an open top.
The jet plate 220 may include a division plate 230 therein. The jet plate 220 may be embodied as a hollow shape with an open top. The division plate 230 may be installed in the jet plate 220 through the open top of the jet plate 220.
The division plate 230 may also be embodied as a hollow shape with an open top. The open top of the division plate 230 may be covered by a cover 232. A first air inlet 233 may be formed in the cover 232. Also, a plurality of division holes 231 may be formed in the division plate 230. The division holes 231 may also be aligned and arranged in the lateral direction (the y-axis direction in FIG. 4), which is the width direction of the plating pot, and the longitudinal direction (the z-axis direction in FIG. 4), which is the height direction of the plating pot. Air which flows into the air inlet 233 of the cover 232 is discharged through the division holes 231.
The division holes 231 uniformly distribute supplied air to the transfer nozzles 211 and separate air introduced toward the transfer nozzles 211 from air introduced toward the collection nozzles 212 to effectively utilize the supplied air.
Referring to FIG. 3, the open top of the jet plate 220 is covered by being coupled with a connection portion 240. The connection portion 240 may connect the top of the jet plate 220 to the moving portion 300 to tilt.
A second air inlet 241 which communicates with an inside of the jet plate 220 may be formed in the connection portion 240. A lever 250 may be coupled to a top of the connection portion 240. Meanwhile, connection rings 242 may be formed on both sides of the top of the connection portion 240. The connection rings 242 perform a function of connecting the jet plate 220 to the moving portion 300.
FIG. 5 is a view illustrating airflow in the jet plate.
Referring to FIG. 5, air which flows into the jet plate 220 may form three main flows.
First, some of the air which flows into the jet plate 220 flows into the first air inlet 233 and enters the inside of the division plate 230. Air A1 which enters the inside of the division plate 230 is discharged through the division holes 231 and moves toward the transfer nozzles 211 (in FIG. 4) of the jet plate 220.
Second, other of the air which flows into the jet plate 220 flows into a space between outer walls of the division plate 230 and inner walls of the jet plate 220, and air A2 which flows thereinto moves toward the collection nozzles 212 (in FIG. 4) of the jet plate 220.
FIG. 6 is a view illustrating airflow at a bottom of the jet plate.
Third, referring to FIGS. 5 and 6, some of the air which flows into the space between the outer walls of the division plate 230 and the inner walls of the jet plate 220 flows into a lower outer wall of the division plate 230 and a lower inner wall of the jet plate 220. Air A3 which flows thereinto moves toward the jet slit 211b of the transfer nozzle 211 (in FIG. 4) of the jet plate 220.
FIG. 7 is a view illustrating an airflow discharged toward a front and a rear of the jet plate.
Referring to FIG. 7, among air which flows into the jet plate 220, the air A1, which flows into the division plate 230, is discharged through the front and rear of the jet plate 220. Also, among air which flows into the jet plate 220, the air A2 , which does not flow into the division plate 230, is also discharged through the front and rear of the jet plate 220.
FIG. 8 is a view illustrating airflows discharged from the transfer nozzle and the collection nozzle.
Referring to FIG. 8, in the lateral direction (the y-axis direction in FIG. 4) corresponding to the width direction of the plating pot, there is a difference in a flow rate of air discharged from the jet plate 220.
The air A1 jetted by the transfer nozzle 211 (in FIG. 4) located in a central portion on the basis of the lateral direction of the jet plate 220 is uniformly discharged in a relatively wide area and pushes out top dross.
On the other hand, the air A2 jetted by the collection nozzles 212 (in FIG. 4) located on both sides on the basis of the lateral direction of the jet plate 220 is discharged with a high flow rate in a relatively narrow area and collects top dross at the central portion of the jet plate 220.
FIG. 9 is a view illustrating a shape of the front surface and the shape of a rear surface of the jet plate.
Referring to FIG. 9, the front surface 221 and the rear surface 222 of the jet plate 220 may be formed to become farther from a reference line H, which connects edge parts of both sides of the jet plate 220, starting from the edge parts toward the central portion of the jet plate 220. In detail, the front surface 221 and the rear surface 222 of the jet plate 220 may be formed to be concavely curved. This is for effectively collecting top dross at the central portion of the jet plate 220 using the air A2 jetted by the collection nozzles 212 (in FIG. 4) located on both sides on the basis of the lateral direction of the jet plate 220 (the y-axis direction in FIG. 4).
FIG. 10 is a view illustrating a state in which top dross is collected and moved.
Referring to FIG. 10, the air A1 discharged by the transfer nozzle 211 (in FIG. 4) pushes out top dross D in an arrow direction of FIG. 10. Also, the air A2 discharged by the collection nozzles 212 (in FIG. 4) located on both sides of the jet plate 220 pushes out and collects the top dross D toward the central portion of the jet plate 220.
The collection nozzle 212 (in FIG. 10) may be formed to have a cross-sectional area which increases in an air jet direction. Also, the collection nozzle 212 (in FIG. 10) may be formed to tilt such that the air jet direction faces the central portion of the jet plate 220 at which the transfer nozzles 211 (in FIG. 4) are located.
For example, when a reference line formed in a direction in which the moving portion 300 moves is referred to as CL in FIG. 10, an inner wall 212a of the collection nozzle 212 (in FIG. 10) may be formed to tilt toward CL in FIG. 10 at a certain angle R.
The above-described configuration of the collection nozzle 212 (in FIG. 10) is for directing a jet direction of the air A2 toward the central portion of the jet plate 220 to easily collect the top dross D.
FIG. 11 is a view illustrating the lever.
Referring to FIGS. 3 and 11, the lever 250 performs a function of converting a rectilineal movement of the moving portion 300 into a pivoting movement of the air jet portion 200 for tilting. The lever 250 may be coupled to the connection portion 240 of the jet plate 220. An air inlet 251, which is connected to the air supply portion 100 and through which air flows in, may be formed at a top of the lever 250. An air flow path 252 which communicates with the air inlet 251 may be formed in the lever 250. When the lever 250 is coupled to the connection portion 240, the air flow path 252 communicates with an inside of the connection portion 240 and an internal space of the jet plate 220.
The lever 250 may include a long-hole-shaped slot 253. A lever
connection pin 334a of the moving portion 300 may be inserted into the slot 253.
FIG. 12 is a view illustrating the moving portion, and FIG. 13 is a view illustrating the device for removing top dross of a plating pot, to which air is supplied before the device moves.
Referring to FIGS. 12 and 13, the moving portion 300 may include a support 310, a transfer bogie 320, and a driving portion 330.
The support 310 may be disposed lengthwise along the width direction or a length direction of the plating pot. A rack bar 311 may be installed on a side surface of the support 310. Also, a transfer rail 312 may be formed below the side surface of the support 310. A cable tray 313 may be formed on a top surface of the support 310.
The transfer bogie 320 is movably coupled to the support 310. The transfer bogie 320 is formed to have a plate shape, and one side surface may be coupled to the transfer rail 312 of the moving portion 300. Thus, when the driving portion 330 operates, the transfer bogie 320 moves along the support 310.
A tilting driving portion 321 may be installed on the transfer bogie 320. The tilting driving portion 321 may include a rail 321a, a tilting angle changing bogie 321b, and a stopper 321c. The rail 321a may be formed on a top surface of the transfer bogie 320 to be lengthwise in a length direction of the support 310. The tilting angle changing bogie 321b is coupled to the rail 321a and moves rectilinearly. The stoppers 321c are installed on both ends of the rail 321a to restrict a movement displacement of the tilting angle changing bogie 321b.
A slot 322 may be formed at the transfer bogie 320 along the length direction of the support 310. The lever 250 of the air jet portion 200 passes through the slot 322 from below the transfer bogie 320 and is located above the transfer bogie 320. A length of the slot 322 may be adequately designed in
consideration of a pivoting range of the lever 250.
A tilting shaft 323 may be provided at a side surface of the transfer bogie 320. While the air jet portion 200 is coupled below the transfer bogie 320 to tilt, the tilting shaft 323 performs a function of connecting the transfer bogie 320 to the air jet portion 200 to tilt.
In detail, the connection rings 242 (in FIG. 2) are formed at the connection portion 240 coupled to the top of the jet plate 220 and are rotatably connected to the tilting shaft 323 such that the jet plate 220 and the transfer bogie 320 are coupled to each other.
The driving portion 330 provides the transfer bogie 320 with a driving force and is connected to the lever 250 to transfer air supplied by the air supply portion 100 to the jet plate 220.
The driving portion 330 may include a motor 331, a rack gear 332, a motor case 333, and a motor support 334.
The rack gear 332 may be coupled to a rotating shaft of the motor 331. The rack gear 332 is engaged with a rack bar 311 formed at the support 310. The motor 331 may be located in the motor case 333. The rack gear 332 may be located outside the motor case 333.
A cooling space for cooling the motor 331 may be provided between the motor case 333 and the motor 331. An inlet 331a and an outlet 331b, which communicate with the cooling space, may be provided at the motor case 333. The inlet 331a is connected to the air supply portion 100 and receives air. The outlet 331b is connected to the air inlet 251 of the lever 250.
The air supplied by the air supply portion 100 passes through the inlet 331a and flows into the motor case 333. The air which flows into the motor case 333 is primarily used as a refrigerant which cools the motor 331 in the cooling space. The air heat-exchanged with the motor 331 passes the lever 250 through the outlet 331b and is supplied to the jet plate 220. The air supplied to the jet plate 220 is secondarily used as a working fluid which collects and moves the top dross D.
Since the air for collecting and moving the top dross D is used as a refrigerant for the motor 331 before approaching the jet plate 220 as described above, it is unnecessary to provide an additional cooling device for cooling the motor 331.The motor support 334 is connected to the motor case 333. Accordingly, the motor support 334 moves along with the motor case 333. Also, the motor support 334 is mounted on the transfer bogie 320. As a result thereof, when the motor 331 operates and the rack gear 332 moves along the rack bar 311, the motor support 334 moves along therewith and additionally the tilting angle changing bogie 321b also moves along the rail 321a.
Meanwhile, the lever connection pin 334a may be formed to protrude from the motor support 334. The lever connection pin 334a is inserted into the slot 253 of the lever 250 which protrudes through the slot 322 of the transfer bogie 320.
Accordingly, when the motor support 334 moves in a second direction, the lever connection pin 334a also moves along the slot 253 and the lever 250 pivots. When the lever 250 pivots, the jet plate 220 tilts. Referring to FIG. 13, when air is supplied to the moving portion 300 through a cable 110 connected to the air supply portion 100, the air A2 for collection may be jetted by the both sides of the jet plate 220 and the air A3 for transfer may be jetted by the bottom of the jet plate 220.
FIG. 14 is a view illustrating a state in which the jet plate tilts after air supply.
Referring to FIG. 14, when the motor 331 operates, the rack gear 332 moves along the rack bar 311 such that the motor support 334 moves in the second direction and additionally the tilting angle changing bogie 321b also moves along the rail 321a. As the tilting angle changing bogie 321b moves, the lever 250 connected to the lever connection pin 334a pivots such that the jet plate 220 tilts on the tilting shaft 323 along with the pivoting of the lever 250.
FIG. 15 is a view illustrating a state of the air jet portion before tilting, FIG. 16 is a view illustrating a state in which the moving portion moves forward such that the air jet portion tilts, and FIG. 17 is a view illustrating a state in which the moving portion moves backward such that the air jet portion tilts.
Referring to FIG. 15, while the motor 331 does not operate, when a reference line formed in the height direction of the plating pot is referred to as CL in FIG. 15, a jet direction of the jet plate 220 is formed to be perpendicular to CL in FIG. 15.
Referring to FIG. 16, when the motor 331 operates, the motor support 334 moves forward and additionally the tilting angle changing bogie 321b also moves along the rail 321a. As the tilting angle changing bogie 321b moves forward, the lever 250 connected to the lever connection pin 334a pivots counterclockwise such that the jet plate 220 tilts on the tilting shaft 323 along with the pivoting of the lever 250.
Here, the reference line formed in the height direction of the plating pot is referred to as CL in FIG. 16, the jet direction of the jet plate 220 tilts against CL in FIG. 16 at a certain angle R1 and faces the molten surface.
Referring to FIG. 17, on the other hand, when the motor operates and the motor support 334 moves backward, as the tilting angle changing bogie 321b moves backward, the lever 250 connected to the lever connection pin 334a pivots counterclockwise such that the jet plate 220 tilts on the tilting shaft 323 along with the pivoting of the lever 250.
Here, when the reference line formed in the height direction of the plating pot is referred to as CL in FIG. 17, the jet direction of the jet plate 220 tilts against CL in FIG. 17 at a certain angle R2 and faces the molten surface.
FIG. 18 is a view illustrating a state in which the moving portion continuously moves such that the air jet portion is moved.
Referring to FIG. 18, while the jet plate 220 has tilted and the lever 250 has stopped moving, when the motor 331 operates such that the motor support 334 continuously moves, the transfer bogie 320 moves along the transfer rail 312 of the support 310 such that the jet plate 220 moves.
FIG. 19 illustrates another embodiment of the moving portion, and FIG. 20 is a view for comparing embodiments of the moving portion.
As shown in FIG. 20(a), the slot 322 formed at the transfer bogie 320 is not located between the support 310 and the rail 321a on the basis of the lateral direction. As shown in FIGS. 19 and 20(b), the slot 322 formed at the transfer bogie 320 is not located between the support 310 and the rail 321a on the basis of the lateral direction and may be formed on an opposite side thereof on the basis of the rail 321a. Also, the lever connection pin 334a may be formed at the tilting angle changing bogie 321b.
Also, the lever 250 may be formed to be biased toward the side surface of the jet plate 220 on the basis of the lateral direction.
As described above, the device for removing top dross of a plating pot according to one exemplary embodiment of the present invention has been described in detail with reference to the attached drawings.
The above description is merely for exemplarily describing the technical concept of the present invention, and a variety of modifications, changes, and replacements thereof may be made by one of ordinary skill in the art without departing from the essential features of the present invention. Accordingly, the embodiment disclosed herein and the attached drawings are not intended to limit and merely explain the technical concept of the present invention, and the scope of the present invention should not be limited by the above embodiment and the attached drawings. It should be understood that the scope of the present invention should be interpreted by the following claims and all technical concepts within the equivalent scope thereof should be included in the scope of the present invention.

100: Air Supply Portion, 200: Air Jet Portion, 210: Jet Nozzle, 211:
Transfer Nozzle, 211a: Jet Hole, 211b: Jet Slit, 212: Collection Nozzle, 220: Jet Plate, 230: Division Plate, 231: Division Hole, 232: Cover, 233: First Air Inlet, 240: Connection Portion, 241: Second Air Inlet, 242: Connection rings, 250: Lever, 251: Air Inlet, 252: Air Flow Rate, 300: Moving Portion, 310: Support, 311: Rack Bar, 312: Transfer Rail, 313: Cable Tray, 320: Transfer Bogie, 321: Tilting Driving Portion, 321a: Rail, 321b: Tilting Angle Changing Bogie, 321c: Stopper, 322: Slot, 323: Tilting Shaft, 330: Driving Portion, 331: Motor, 332: Rack Gear, 333: Motor Case, 334: Motor Support

WE CLAIM:
[Claim 1]
A device for removing top dross of a plating pot, comprising:
an air supply portion; and
an air jet portion which is connected to the air supply portion, is disposed on a molten surface of the plating pot, and comprises a plurality of jet nozzles. [Claim 2]
The device of claim 1, wherein the plurality of jet nozzles are arranged to be laterally and longitudinally aligned. [Claim 3]
The device of claim 1, wherein the air jet portion comprises a jet plate which is connected to the air supply portion and at which the jet nozzles are formed. [Claim 4]
The device of claim 3, wherein the jet nozzles comprise transfer nozzles and collection nozzles, and the collection nozzles are disposed outside the transfer nozzles at an outermost part among the transfer nozzles on the basis of a lateral direction. [Claim 5]
The device of claim 4, wherein the collection nozzles have a cross-sectional area which increases in a jet direction. [Claim 6]
The device of claim 4, wherein the transfer nozzles each comprise a jet hole and a jet slit, and a cross-sectional area of the jet slit is greater than that of one jet hole. [Claim 7]
The device of claim 6, wherein the jet slit is disposed below the jet hole located at a lowermost end among the plurality of jet holes on the basis of a height direction of the plating pot. [Claim 8]
The device of claim 6, wherein a cross-sectional area of the collection nozzle is formed to be greater than the cross-sectional area of the jet hole. [Claim 9]
The device of claim 8, wherein the collection nozzle is formed to allow the jet direction to face a center of the jet plate on the basis of the lateral direction. [Claim 10]
The device of claim 9, wherein an inner wall of the collection nozzle is formed to tilt toward the center of the jet plate on the basis of a reference line which faces frontward. [Claim 11]
The device of claim 3, wherein the jet plate comprises a division plate which is installed therein and at which a plurality of division holes are formed. [Claim 12]
The device of claim 11, further comprising a moving portion which is connected to the air jet portion and moves the air jet portion. [Claim 13]
The device of claim 12, wherein the moving portion comprises:
a support disposed above the plating pot;
a transfer bogie movably coupled to the support; and a driving portion installed on the transfer bogie and coupled to the support to transmit power thereto. [Claim 14]
The device of claim 13, wherein the jet plate is coupled to the transfer bogie to tilt. [Claim 15]
The device of claim 14, wherein a slot is formed at the transfer bogie, and the jet plate is disposed below the transfer bogie, and
wherein the jet plate comprises a lever which is formed on a top thereof and passes through the slot, and the transfer bogie comprises a tilting driving portion which is disposed on a top surface thereof, is connected to the lever, and reciprocates. [Claim 16]
The device of claim 15, wherein the tilting driving portion comprises a rail formed at the top surface of the transfer bogie in a second direction and a tilting angle changing bogie which is slidably coupled to the rail and at which a lever connection portion inserted into the lever is formed. [Claim 17]
The device of claim 16, wherein the driving portion comprises a motor, a rack gear coupled to a rotating shaft of the motor, a motor case which comprises the motor therein, and a motor support which supports the motor case, and
wherein the support comprises a rack bar which is formed along the second direction and is engaged with the rack gear. [Claim 18]
The device of claim 17, wherein the motor support is coupled to the tilting angle changing bogie. [Claim 19]
The device of claim 17, wherein the motor case forms a cooling space therein, and the cooling space communicates with the air supply portion and an inside of the jet plate. [Claim 20]
The device of claim 19, wherein the lever comprises an air flow path which is formed therein and communicates with the cooling space of the motor case and the jet plate.