【Technical Field】
The present disclosure relates to a foreign material
removal device, and more specifically, to a foreign material
removal device that may remove foreign materials attached to
a surface of a rotating roll, such as a strip transfer roll.
10
【Background Art】
In general, strip steel rolled in the form of a thin plate
may be subjected to various processes, while being supported
by a plurality of rolls and continuously traveling, to be
15 manufactured into products that meet the requirements of
consumers.
Here, transfer equipment including a plurality of
transfer rolls may serve to transfer the steel to various
processes.
20 However, since such transfer rolls are formed of urethane,
a large amount of foreign materials may be attached to the
surface thereof after the passage of time.
These foreign materials may cause a problem, in that dents,
such as uneven defects, may occur on the surface of the
25 transferred strip steel.
3
In order to solve this problem in the related art, a fixed
blade is fixed to the surface of a strip transfer roll to be
in close contact therewith, and then foreign materials, such
as a magnesium oxide (MgO) powder, adhering to the surface, are
5 removed by rotating the transfer roll.
However, when foreign materials are removed by the
conventional method, the foreign materials may not be entirely
removed from the surface of the transfer roll.
Further, a portion of the foreign material separated from
10 the transfer roll may fall down onto the upper surface of strip
steel being transferred, to be in contact with the transfer roll
again, thus resulting in a defect in which grooves may be formed
in the surface of the transfer roll.
15 【Disclosure】
【Technical Problem】
An aspect of the present disclosure may provide a foreign
material removal device that may separate foreign materials
attached to a surface of a strip transfer roll, collect the
20 foreign materials, and entirely discharge the foreign materials
externally.
【Technical Solution】
According to an aspect of the present disclosure, a
foreign material removal device comprises: a housing disposed
25 in a width direction of an object; a foreign material separating
4
means provided on the housing, and separating foreign materials
from a surface of the rotating object; and an air guide unit
disposed on the housing to form a gap with the object, and
supplying air to the gap to guide, to the interior of the housing,
5 the foreign materials separated from at least the object.
The air guide unit may include: a body provided on the
housing, and having a chamber storing externally flowing air;
an air knife disposed on the body, and forming a lip gap with
the chamber, to guide the air stored in the chamber to be
10 externally discharged; and a guide member protruding from the
body to the object to form the gap, and formed to have at least
a curved surface, such that air sprayed from the lip gap at high
speed may flow on the guide member.
The foreign material separating means may be provided as
15 a scraper contacting the surface of the object to separate the
foreign materials therefrom.
The scraper may be fastened to a base block hinge-coupled
to the housing and rotated within a predetermined angular range.
The base block may have an inclined surface, such that
20 air flowing on the scraper through the gap may be guided to the
interior of the housing.
The foreign material separating means may be provided as
a wide area nozzle unit spraying a fluid to the entire area of
the object in the width direction of the object, to separate
25 the foreign materials attached to the object.
5
The wide area nozzle unit may include: a nozzle body member
connected to a fluid supply line; and inclined tap members
inclinedly coupled to the nozzle body member, to spray the fluid
to the object in a direction inclined with respect to the object.
5 The foreign material removal device may further include
vertical tap members vertically coupled to the nozzle body
member, to spray the fluid to the object in a direction
perpendicular to the object.
The inclined tap members may be provided between the
10 vertical tap members.
The wide area nozzle unit may further include a driving
cylinder coupled to the housing, and having a linearly moving
rod coupled to the nozzle body member, to allow the nozzle body
member to reciprocate in the width direction of the object.
15 The air guide unit may be provided as a pair of air guide
units disposed above and below the wide area nozzle unit.
The foreign material separating means may be provided as
a foreign material removal roll rotatably fastened to the
housing, rotated by a driving unit, and contacting the surface
20 of the object to separate the foreign materials therefrom.
The foreign material removal roll may have a foreign
material removal groove formed in a surface thereof to have a
spiral shape.
The foreign material removal roll may also have a fiber
25 rope wound spirally around a surface thereof to separate the
6
foreign materials through contact with the object.
Further, the foreign material removal roll may have a
fiber rope wound spirally around a surface thereof to separate
the foreign materials through contact with the object, and may
5 have a foreign material removal groove spaced apart from the
fiber rope and formed to have a spiral shape.
The air guide unit may be provided as a pair of air guide
units disposed above and below the foreign material removal
roll.
10 The driving unit may include: a driving motor generating
rotary force; a driving pulley rotated by the driving motor;
and a belt connecting a rotary shaft disposed on one side of
the foreign material removal roll to the driving pulley.
The foreign material removal device may further include
15 a control unit electrically connected to the driving motor of
the driving unit to control rotational speed of the foreign
material removal roll.
The foreign material removal device may further include:
a base plate provided below the housing to support the housing
20 with a support; a sliding panel provided on the base plate to
slide in forward and backward directions, and fastened to the
housing; and a sliding panel driving unit sliding the sliding
panel.
The foreign material removal device may further include
25 a control unit electrically connected to the sliding panel
7
driving unit to control forward and backward speeds of the
sliding panel.
The control unit may control the sliding panel driving
unit, such that the foreign material removal roll may separate
5 the foreign materials from the surface of the object by
repeatedly contacting and breaking contact with the object.
The foreign material removal device may further include
a discharging means disposed in the interior of the housing,
collecting the foreign materials guided to the interior of the
10 housing, and externally discharging the foreign materials.
The discharging means may include: a collecting part
disposed in a width direction of the housing, and having a
plurality of holes formed in a side of the collecting part toward
the foreign material separating means to intake the foreign
15 materials; and a discharging part connected to one end portion
of the collecting part to provide intake force, and discharging
the foreign materials intaken by the collecting part.
The collecting part may have a pipe shape with a hollow
portion, and may be formed to be tapered, such that the internal
20 diameter of the hollow portion may decrease from the one end
portion to the other end portion of the collecting part.
The object may be provided as a strip transfer roll on
which strip steel may pass.
25 【Advantageous Effects】
8
According to an exemplary embodiment in the present
disclosure, a foreign material removal device may obtain an
effect of completely removing foreign materials, with respect
to the entire width direction of a strip transfer roll.
5 Further, the foreign material removal device may obtain
an effect of preventing foreign materials from being reattached
to the strip transfer roll by fully collecting the foreign
materials separated from the strip transfer roll and externally
discharging the foreign materials.
10
【Description of Drawings】
FIG. 1 is a perspective view schematically illustrating
a state in which a foreign material removal device, according
to an exemplary embodiment in the present disclosure, is
15 installed;
FIG. 2 is a perspective view schematically illustrating
the foreign material removal device, according to the exemplary
embodiment in the present disclosure;
FIG. 3 is a cross-sectional view schematically
20 illustrating the foreign material removal device, according to
the exemplary embodiment in the present disclosure;
FIG. 4 is a cross-sectional view schematically
illustrating an operating state of the foreign material removal
device, according to the exemplary embodiment in the present
25 disclosure;
9
FIG. 5 is a cross-sectional view schematically
illustrating the foreign material removal device, taken along
line I-I' of FIG. 2;
FIG. 6 is a view schematically illustrating an analysis
5 result of the distribution of air flow speed within the foreign
material removal device, according to the exemplary embodiment
in the present disclosure;
FIG. 7 is a perspective view schematically illustrating
a foreign material removal device, according to another
10 exemplary embodiment in the present disclosure;
FIG. 8 is a partially exploded perspective view
schematically illustrating the foreign material removal device,
according to another exemplary embodiment in the present
disclosure;
15 FIG. 9 is a cross-sectional view schematically
illustrating an operating state of the foreign material removal
device, according to another exemplary embodiment in the
present disclosure;
FIG. 10 is a cross-sectional view schematically
20 illustrating an operating state of a foreign material removal
device, according to another exemplary embodiment in the
present disclosure;
FIG. 11 is a perspective view schematically illustrating
a foreign material removal roll of the foreign material removal
25 device, according to another exemplary embodiment in the
10
present disclosure;
FIG. 12 is a front view schematically illustrating the
foreign material removal device, according to another exemplary
embodiment in the present disclosure; and
5 FIG. 13 is a side view schematically illustrating the
foreign material removal device, according to another exemplary
embodiment in the present disclosure.
【Best Mode for Invention】
10 To help understand the foregoing features of the present
disclosure, a foreign material removal device, in relation to
an exemplary embodiment in the present disclosure, will be
described in more detail, hereinafter.
In the following description, the same elements will be
15 designated by the same reference numerals, even when
illustrated in different drawings. Further, in the following
description of exemplary embodiment in the present disclosure,
a detailed description of known configurations or functions
incorporated herein will be omitted when the gist of the present
20 disclosure may be rendered unclear thereby.
Hereinafter, exemplary embodiments in the present
disclosure will be described in detail with reference to the
accompanying drawings.
FIG. 1 is a perspective view schematically illustrating
25 a state in which a foreign material removal device, according
11
to an exemplary embodiment in the present disclosure, is
installed. FIG. 2 is a perspective view schematically
illustrating the foreign material removal device. FIG. 3 is
a cross-sectional view schematically illustrating the foreign
5 material removal device. FIG. 4 is a cross-sectional view
schematically illustrating an operating state of the foreign
material removal device. FIG. 5 is a cross-sectional view
schematically illustrating the foreign material removal device,
taken along line I-I' of FIG. 2. FIG. 6 is a view schematically
10 illustrating an analysis result of the distribution of air flow
speed within the foreign material removal device.
Referring to FIGS. 1 through 6, a foreign material removal
device 100, according to an exemplary embodiment in the present
disclosure, may include a housing 210 disposed in a width
15 direction of an object; a foreign material separating means
provided on the housing 210, and separating foreign materials
from a surface of the rotating object; and an air guide unit
300 disposed on the housing to form a gap G with the object,
and supplying air to the gap G to guide, to the interior of the
20 housing 210, the foreign materials separated from the object
by the air converging in the gap G and then released therefrom.
Here, the object may be a strip transfer roll 10 on which
strip steel may pass. However, the object, from which the
foreign material removal device 100 may remove the foreign
25 materials, is not limited to the strip transfer roll. As long
12
as the object is a rotating roll, such as a rolling roll, a roll
for continuous casting, or the like, the foreign material
removal device 100, according to an exemplary embodiment in the
present disclosure, may be installed to remove foreign
5 materials from a surface of the rotating roll. The object may
hereinafter be referred to as a transfer roll 10.
In particular, when the transfer roll 10 is a transfer
roll transferring strip steel after secondary high-temperature
annealing during a process of producing an electrical steel
10 sheet product, a non-reactive MgO powder may be attached to a
surface of the strip steel after the secondary high-temperature
annealing, to adhere to the transfer roll 10, causing a problem,
such as a dent.
The foreign material removal device 100, according to an
15 exemplary embodiment in the present disclosure, may be disposed
at the strip transfer roll 10 to separate a powder (foreign
materials) adhering to the transfer roll 10, entirely intake
the powder, and externally discharge the powder. Further, the
foreign material removal device 100 may also intake powder
20 (foreign materials) fallen down from the transferred strip
steel and remove the powder.
However, the application of the foreign material removal
device 100, according to an exemplary embodiment in the present
disclosure, is not limited thereto, and the foreign material
25 removal device 100 may be used in any application in which the
13
foreign materials need to be removed from the surface of the
rotating roll.
The foreign material separating means may be provided as
a scraper 220 contacting the surface of the transfer roll 10,
5 the object, to separate the foreign materials therefrom.
The scraper 220 may have a length greater than or equal
to that of the transfer roll 10, and may have an end portion
having a blade shape. The end portion may be provided to be
in close contact with the surface of the transfer roll 10 to
10 separate the foreign materials from the surface of the rotating
transfer roll 10. However, the shape of the scraper 220 is not
limited thereto, and the scraper 220 may have any shape able
to separate the foreign materials from the surface of the
transfer roll 10.
15 Further, the scraper 220 may be fastened to a base block
230 hinge-coupled to the housing 210 and rotated within a
predetermined angular range.
Here, the base block 230 may have the scraper 220 fastened
thereto on a lower surface thereof, and may have an inclined
20 surface 231, such that air flowing on the scraper 220 through
the gap G may be guided to the interior of the housing 210.
Furthermore, the base block 230 may be formed, such that
an end portion 232 thereof may have a rounded shape. In the
drawings, a portion of the end portion 232 of the base block
25 230 is illustrated as having a rounded shape. However, the
14
entirety of the end portion 232 of the base block 230 may be
formed to have an arc shape.
Such a shape of the base block 230 may lead to a high-speed
flow of the air guided to the interior of the housing 210 through
5 the gap G, so that air below the scraper 220 may also be guided
to the interior of the housing 210 to flow therein. The end
portion 232 of the base block 230 may be formed to have a rounded
shape, to readily guide air flowing into the housing 210.
The air guide unit 300 may be disposed above the scraper
10 220 on the housing, and may supply air to the gap G formed between
the transfer roll 10 and the air guide unit 300 at high speed.
When the air is supplied to the gap G at high speed, the air
may converge in the gap G to form a high-pressure air layer.
The high-pressure air layer may pressurize the scraper 220.
15 Ultimately, the scraper 220 may be in close contact with the
surface of the transfer roll 10 at a certain level of pressure,
to separate the foreign materials from the surface of the
transfer roll 10 more effectively.
Here, the pressure of the air converging in the gap G by
20 the air guide unit 300 may be about 10 to 15 times of that of
air supplied to the air guide unit 300.
The air passing through the gap G may expand while being
released therefrom, and thus the temperature of the air may be
lowered. The air having the lowered temperature may cool the
25 scraper 220 and the transfer roll 10. Namely, when the scraper
15
220 comes into close contact with the rotating transfer roll
10, frictional heat may occur to reduce the lifespan of the
transfer roll 10 and the scraper 220, and in this case, the
scraper 220 and the transfer roll 10 may be cooled by the air
5 guide unit 300 without using an additional cooling device.
Further, the air flowing into the housing 210 through the
gap G at high speed may cause the air below the scraper 220 to
flow into the housing 210, so that scattered foreign materials
may be collected in the housing 210 more efficiently.
10 In more detail, the air guide unit 300 may include a body
310 provided on the housing 210, and having a chamber 311 storing
air flowing externally; an air knife 320 disposed on the body
310, and forming a lip gap L with the chamber 311 to guide the
air stored in the chamber 311 to be externally discharged; and
15 a guide member 330 protruding from the body 310 to the transfer
roll 10 to form the gap G, and formed to have at least a curved
surface, such that air sprayed from the lip gap L at high speed
may flow on the guide member 330.
The body 310 may have at least a length greater than or
20 equal to the transfer roll 10, may be spaced apart from the
transfer roll 10 by a certain interval, and may be disposed in
the width direction of the transfer roll 10. The body 310 may
have the chamber 311 formed therein to store the air flowing
externally.
25 The chamber 311 may be provided as a hollow portion inside
16
the body 310, and may be formed through an upper portion of the
body 310. The chamber 311 may be connected to an external air
supply line 20, such that air may be supplied to the chamber
311 at a certain level of pressure.
5 The air knife 320 may be provided on an upper portion of
the body 310 to cover an open side of the chamber 311, and may
be disposed, such that only a portion of the chamber 311 may
be open. Namely, the air knife 320 may form the lip gap L with
the chamber 311 to allow the air supplied to the chamber 311
10 to be discharged at high speed. Here, the lip gap L may range
from about 50 μm to about 100 μm.
The guide member 330 may protrude from the body 310 to
the transfer roll 10 to form the gap G with the transfer roll
10, and may be formed to have the curved surface, such that the
15 air sprayed from the lip gap L at high speed may flow on the
guide member 330. Namely, the air sprayed from the lip gap L
at high speed may flow on the guide member 330 by the Coanda
effect, to be guided to the interior of the housing 210. Here,
the guide member 330 may be individually provided, and may be
20 fastened to the body 310 or integrally formed with the body 310.
The guide member 330 may also have various shapes having
an inclined surface, such as a curved surface (a round surface),
a bent surface, or a polygonal surface. However, it may be
preferable that the guide member 330 be formed to have a curved
25 surface.
17
In an exemplary embodiment of an operating state of the
air guide unit 300 as configured above, when the transfer roll
10 is rotated at a speed of 170 m/min and air is supplied to
the chamber 311 of the body 310 at a flow rate 0.03 kg/s, air
5 passing through the lip gap L may be sprayed at a high speed
of 372 m/s, may adhere to the guide member 330, and may be guided
to the gap G. When air flows into the gap G at high speed, the
ambient air may converge in the gap G. In this case, a flow
rate of the air passing through the gap G may be 0.37 kg/s. Thus,
10 the flow rate of the air passing through the gap G may be
increased about 12 times that of the air supplied to the chamber
311.
The distribution of air flow speed generated in the
foreign material removal device 100, and the distribution of
15 air flow speed generated around the foreign material removal
device 100 are analyzed by finite element analysis and
illustrated in FIG. 6.
When the temperature of the air supplied to the chamber
311 is 60°C, the temperature of the air passing through the lip
20 gap L may drop suddenly to 0.6°C by the instant adiabatic
expansion. The cooled air may cool the scraper 220 and the
transfer roll 10.
A discharging means 400 may be disposed inside the housing
210, such that foreign materials guided to the interior of the
25 housing 210 may be collected and externally discharged.
18
The discharging means 400 may include a collecting part
410 disposed in a length direction of the housing 210, and having
a plurality of holes formed in a side of the collecting part
toward the scraper 220 to intake the foreign materials; and a
5 discharging part 420 connected to one end portion of the
collecting part 410 to provide intake force, and externally
discharging the foreign materials intaken by the collecting
part 410.
Although not illustrated in the drawings, an intake pump
10 (not illustrated) may be connected to the discharging part 420
to provide intake force to the collecting part 410 and the
discharging part 420, such that the foreign materials flowing
into the collecting part 410 may be intaken and discharged
externally.
15 Here, the collecting part 410 may be provided in the form
of a pipe having a hollow portion 411, and a plurality of holes
412 may be formed in a side of the collecting part 410 toward
the scraper 220, such that the foreign materials separated from
the transfer roll 10 may flow into the collecting part 410. The
20 collecting part 410 may be formed to be tapered, such that the
internal diameter of the hollow portion 411 may decrease from
the one end portion to the other end portion of the collecting
part 410. Namely, the collecting part 410 may be formed, such
that the diameter of the one end portion connected to the
25 discharging part 420 may be greater than that of the other end
19
portion of the collecting part 410, and thus an inclination,
decreasing from the other end portion to the one end portion,
may be formed on the collecting part 410. Thus, when intake
force is provided by the discharging part 420, the foreign
5 materials stored in the collecting part 410 may be readily moved
to a side of the discharging part 420 on the inclination, thereby
improving foreign material discharging efficiency.
FIG. 7 is a perspective view schematically illustrating
a foreign material removal device, according to another
10 exemplary embodiment in the present disclosure. FIG. 8 is a
partially exploded perspective view schematically
illustrating the foreign material removal device, according to
another exemplary embodiment in the present disclosure. FIG.
9 is a cross-sectional view schematically illustrating an
15 operating state of the foreign material removal device,
according to another exemplary embodiment in the present
disclosure.
Referring to FIGS. 7 through 9, a foreign material removal
device 110, according to another exemplary embodiment in the
20 present disclosure, may have the same configuration as the
foreign material removal device 100, according to the exemplary
embodiment in the present disclosure, described above with
reference to FIGS. 1 through 6, and is only different from the
foreign material removal device 100 with respect to a foreign
25 material separating means.
20
In more detail, the foreign material separating means of
the foreign material removal device 110, according to another
exemplary embodiment in the present disclosure, may be provided
as a wide area nozzle unit 500 spraying a fluid to the entire
5 area of a strip transfer roll 10 in a width direction of the
strip transfer roll 10, in order to separate foreign materials
attached to the strip transfer roll 10, an object, therefrom.
Here, the meaning of the wording "wide area" used herein
refers to a sprayed area expanded by spraying a fluid in an
10 inclined direction, unlike in the related art.
In more detail, the wide area nozzle unit 500 may include
a nozzle body member 510 connected to a fluid supply line, and
inclined tap members 520 inclinedly coupled to the nozzle body
member 510, to spray the fluid to the strip transfer roll 10
15 in a direction inclined with respect to the strip transfer roll
10.
As described above, the wide area nozzle unit 500 may be
provided to spray the fluid in the inclined direction, and thus
the sprayed area with the fluid sprayed to the strip transfer
20 roll 10 may be expanded.
Provided that a portion of the strip transfer roll 10 to
which the fluid is sprayed is a columnar cross section, a
principle that a cross section obtained by cutting the column
in an inclined direction is wider than that obtained by cutting
25 the column in a vertical direction, is applied to constitute
21
the wide area nozzle unit 500.
Here, the nozzle body member 510 may be an element serving
as a body of the wide area nozzle unit 500, and may receive the
fluid to be sprayed and supply the fluid to the inclined tap
5 members 520.
Namely, the nozzle body member 510 may be connected to
the fluid supply line supplying air or a coolant, and may have
one side coupled to the inclined tap members 520, to supply the
received fluid to the inclined tap members 520.
10 The nozzle body member 510 may be connected to a driving
cylinder 540 to be moved in a direction toward one side of the
transfer roll 10 to which the fluid may be sprayed. Accordingly,
the sprayed area with the fluid may be further expanded by
staggering the spraying of the fluid.
15 In more detail, the driving cylinder 540 may be coupled
to the housing 210, and may have a linearly moving rod 541 coupled
to the nozzle body member 510, to allow the nozzle body member
510 to reciprocate in the width direction of the strip transfer
roll 10. However, a configuration for allowing the nozzle body
20 member 510 to reciprocate is not limited thereto, and various
types of conventional driving devices may be used.
The inclined tap members 520 may serve to spray the fluid
to the strip transfer roll 10 in the inclined direction. For
this purpose, the inclined tap members 520 may be inclinedly
25 coupled to the nozzle body member 510. In other words, the
22
inclined tap members 520 may have spray holes, such that the
spray holes may be provided in a direction tilted at a certain
angle, with respect to a direction in which the nozzle body
member 510 may face the strip transfer roll 10.
5 The inclined tap members 520 may be coupled to the nozzle
body member 510 in the inclined direction, and thus the sprayed
area of the fluid sprayed to the strip transfer roll 10 may be
increased.
In addition, the wide area nozzle unit 500 may further
10 include vertical tap members 530 vertically coupled to the
nozzle body member 510, to spray the fluid to the strip transfer
roll 10 in a direction perpendicular to the strip transfer roll
10.
As described above, when the vertical tap members 530 are
15 provided, the vertical tap members 530 may spray the fluid to
a portion of the strip transfer roll 10 in which a sprayed area
of the fluid may not be formed by the inclined tap members 520,
to further expand the sprayed area of the fluid. Thus, the fluid
may be sprayed to the entire surface of the strip transfer roll
20 10.
The inclined tap members 520 of the wide area nozzle unit
500 may be provided between the vertical tap members 530
provided as a plurality of vertical tap members 530.
In other words, even when the plurality of inclined tap
25 members 520 are provided to form a wide sprayed area, there may
23
be an area between the plurality of inclined tap members 520,
to which the fluid may not be sprayed, and the vertical tap
members 530 may be provided between the plurality of inclined
tap members 520, such that the vertical tap members 530 may spray
5 the fluid to the area.
With this configuration, when the wide area nozzle unit
500 sprays the fluid to the surface of the strip transfer roll
10 to separate the foreign materials from the surface of the
strip transfer roll 10, the separated foreign materials may be
10 allowed to flow into the housing 210 by an air guide unit 300,
and may be removed.
In this case, the air guide unit 300 may be provided as
a pair of air guide units 300 which may be disposed above and
below the wide area nozzle unit 500. Namely, the wide area
15 nozzle unit 500 may be disposed in a center, and the air guide
units 300 may be disposed above and below the wide area nozzle
unit 500, to more efficiently remove the foreign materials
separated from the strip transfer roll 10.
FIG. 10 is a cross-sectional view schematically
20 illustrating an operating state of a foreign material removal
device, according to another exemplary embodiment in the
present disclosure. FIG. 11 is a perspective view
schematically illustrating a foreign material removal roll of
the foreign material removal device, according to another
25 exemplary embodiment in the present disclosure. FIG. 12 is a
24
front view schematically illustrating the foreign material
removal device, according to another exemplary embodiment in
the present disclosure. FIG. 13 is a side view schematically
illustrating the foreign material removal device, according to
5 another exemplary embodiment in the present disclosure.
Referring to FIGS. 10 through 13, a foreign material
removal device 120, according to another exemplary embodiment
in the present disclosure, may have the same configuration as
the foreign material removal device 100, according to the
10 exemplary embodiment in the present disclosure, described above
with reference to FIGS. 1 through 6, and is only different from
the foreign material removal device 100 with respect to a
foreign material separating means.
In more detail, the foreign material separating means of
15 the foreign material removal device 120, according to another
exemplary embodiment in the present disclosure, may be provided
as a foreign material removal roll 610 rotatably fastened to
a housing 210, rotated by a driving unit 620, and contacting
a surface of a strip transfer roll 10, an object, to separate
20 foreign materials therefrom.
The foreign material removal roll 610 may be provided to
be rotated by the driving unit 620, and may have a fiber rope
611 wound spirally around a surface thereof to separate the
foreign materials through contact with the strip transfer roll
25 10. Alternatively, the foreign material removal roll 610 may
25
have a foreign material removal groove 612 formed in the surface
thereof to have a spiral shape. Furthermore, the foreign
material removal roll 610 may have the fiber rope 611 wound
spirally around the surface thereof, and the foreign material
5 removal groove 612 spaced apart from the fiber rope 611 and
formed to have the spiral shape. Namely, when viewed in a length
direction of the foreign material removal roll 610, the fiber
rope 611 and the foreign material removal groove 612 may be
provided to be alternately disposed each other.
10 For example, two rows of grooves may be processed in the
surface of the foreign material removal roll 610, while forming
a spiral shape, and the fiber rope 611 may be wound in one of
the two rows of grooves, to increase fastening force of the fiber
rope 611 to the foreign material removal roll 610. The other
15 of the two rows of grooves may be the foreign material removal
groove 612, and foreign materials separated by the fiber rope
611 may be accommodated in the foreign material removal groove
612, and may then be separated and removed in the form of a cake
through rotation of the foreign material removal roll 610.
20 The driving unit 620 may include a driving motor 621
generating rotary force; a driving pulley 622 rotated by the
driving motor; and a belt 623 connecting a rotary shaft 613
disposed on one side of the foreign material removal roll 610
to the driving pulley 622. The foreign material removal device
25 120 may further include a control unit 630 electrically
26
connected to the driving motor 621 of the driving unit 620 to
control rotational speed of the foreign material removal roll
610.
Here, the control unit 630 may control the foreign
5 material removal roll 610 to be rotated in the same direction
as a rotational direction of the strip transfer roll 10, thus
increasing frictional force. Namely, the foreign material
removal roll 610 and the strip transfer roll 10 may be rotated
in a direction opposite to each other in portions in which the
10 foreign material removal roll 610 and the strip transfer roll
10 may contact each other, to increase the frictional force,
thus efficiently separating the foreign materials.
The control unit 630 may control the foreign material
removal roll 610 to be rotated at rotational speed lower than
15 that of the strip transfer roll 10, thus further increasing
frictional force applied to the strip transfer roll 10.
Furthermore, the foreign material removal device 120,
according to another exemplary embodiment in the present
disclosure, may further include a base plate 640 provided below
20 the housing 210; a sliding panel 642 provided on the base plate
640 to slide in forward and backward directions, and fastened
to the housing 210 by a support 641; and a sliding panel driving
unit 643 sliding the sliding panel 642. Here, the control unit
630 may be electrically connected to the sliding panel driving
25 unit 643 to control forward and backward speeds of the sliding
27
panel 642.
The control unit 630 may also control the sliding panel
driving unit 643, such that the foreign material removal roll
610 may separate the foreign materials from the surface of the
5 strip transfer roll 10 by repeatedly contacting and breaking
contact with the strip transfer roll 10.
Namely, while the sliding panel 642 provided on the base
plate 640 slides in the forward and backward directions, the
housing 210 connected to the sliding panel 642 by the support
10 641 may be moved in forward and backward directions, and an
operation of moving the foreign material removal roll 610
provided on a front surface of the housing 210 in forward and
backward directions, such that the foreign material removal
roll 610 may contact and break contact with the strip transfer
15 roll 10, may be periodically repeated, thus maximizing a foreign
material removal effect. Here, the control unit 630 may also
control forward and backward speeds of the sliding panel 642.
With this configuration, when the foreign material
removal roll 610 separates the foreign materials from the
20 surface of the strip transfer roll 10 through contact with the
surface of the strip transfer roll 10 while being rotated, the
separated foreign materials may be allowed to flow into the
housing 210 by an air guide unit 300, and may be removed.
In this case, the air guide unit 300 may be provided as
25 a pair of air guide units 300 which may be disposed above and
28
below the foreign material removal roll 610. Namely, the
foreign material removal roll 610 may be disposed in a center,
and the air guide units 300 may be disposed above and below the
foreign material removal roll 610, to remove the foreign
5 materials separated from the strip transfer roll 10 more
efficiently.
While exemplary embodiments have been shown and described
above, it will be apparent to those skilled in the art that
modifications and variations could be made without departing
10 from the scope of the present invention as defined by the
appended claims.

We claim:
【Claim 1】
A foreign material removal device comprising:
5 a housing disposed in a width direction of an object;
a foreign material separating means provided on the
housing, and separating foreign materials from a surface of the
rotating object; and
an air guide unit disposed on the housing to form a gap
10 with the object, and supplying air to the gap to guide, to the
interior of the housing, the foreign materials separated from
at least the object.
【Claim 2】
15 The foreign material removal device of claim 1, wherein
the air guide unit includes:
a body provided on the housing, and having a chamber
storing externally flowing air;
an air knife disposed on the body, and forming a lip gap
20 with the chamber, to guide the air stored in the chamber to be
externally discharged; and
a guide member protruding from the body to the object to
form the gap, and formed to have at least a curved surface, such
that air sprayed from the lip gap at high speed flows on the
25 guide member.
30
【Claim 3】
The foreign material removal device of claim 1, wherein
the foreign material separating means is provided as a scraper
5 contacting the surface of the object to separate the foreign
materials therefrom.
【Claim 4】
The foreign material removal device of claim 3, wherein
10 the scraper is fastened to a base block hinge-coupled to the
housing and rotated within a predetermined angular range.
【Claim 5】
The foreign material removal device of claim 4, wherein
15 the base block has an inclined surface, such that air flowing
on the scraper through the gap is guided to the interior of the
housing.
【Claim 6】
20 The foreign material removal device of claim 1, wherein
the foreign material separating means is provided as a wide area
nozzle unit spraying a fluid to the entire area of the object
in the width direction of the object, to separate the foreign
materials attached to the object.
25
31
【Claim 7】
The foreign material removal device of claim 6, wherein
the wide area nozzle unit includes:
a nozzle body member connected to a fluid supply line;
5 and
inclined tap members inclinedly coupled to the nozzle body
member, to spray the fluid to the object in a direction inclined
with respect to the object.
10 【Claim 8】
The foreign material removal device of claim 7, further
comprising: vertical tap members vertically coupled to the
nozzle body member, to spray the fluid to the object in a
direction perpendicular to the object.
15
【Claim 9】
The foreign material removal device of claim 8, wherein
the inclined tap members are provided between the vertical tap
members.
20
【Claim 10】
The foreign material removal device of claim 7, wherein
the wide area nozzle unit further includes: a driving cylinder
coupled to the housing, and having a linearly moving rod coupled
25 to the nozzle body member, to allow the nozzle body member to
32
reciprocate in the width direction of the object.
【Claim 11】
The foreign material removal device of claim 6, wherein
5 the air guide unit is provided as a pair of air guide units
disposed above and below the wide area nozzle unit.
【Claim 12】
The foreign material removal device of claim 1, wherein
10 the foreign material separating means is provided as a foreign
material removal roll rotatably fastened to the housing,
rotated by a driving unit, and contacting the surface of the
object to separate the foreign materials therefrom.
15 【Claim 13】
The foreign material removal device of claim 12, wherein
the foreign material removal roll has a foreign material removal
groove formed in a surface thereof to have a spiral shape.
20 【Claim 14】
The foreign material removal device of claim 12, wherein
the foreign material removal roll has a fiber rope wound
spirally around a surface thereof to separate the foreign
materials through contact with the object.
25
33
【Claim 15】
The foreign material removal device of claim 12, wherein
the foreign material removal roll has a fiber rope wound
spirally around a surface thereof to separate the foreign
5 materials through contact with the object, and has a foreign
material removal groove spaced apart from the fiber rope and
formed to have a spiral shape.
【Claim 16】
10 The foreign material removal device of claim 12, wherein
the air guide unit is provided as a pair of air guide units
disposed above and below the foreign material removal roll.
【Claim 17】
15 The foreign material removal device of claim 12, wherein
the driving unit includes:
a driving motor generating rotary force;
a driving pulley rotated by the driving motor; and
a belt connecting a rotary shaft disposed on one side of
20 the foreign material removal roll to the driving pulley.
【Claim 18】
The foreign material removal device of claim 17, further
comprising: a control unit electrically connected to the
25 driving motor of the driving unit to control rotational speed
34
of the foreign material removal roll.
【Claim 19】
The foreign material removal device of claim 12, further
5 comprising:
a base plate provided below the housing to support the
housing with a support;
a sliding panel provided on the base plate to slide in
forward and backward directions, and fastened to the housing;
10 and
a sliding panel driving unit sliding the sliding panel.
【Claim 20】
The foreign material removal device of claim 19, further
15 comprising: a control unit electrically connected to the
sliding panel driving unit to control forward and backward
speeds of the sliding panel.
【Claim 21】
20 The foreign material removal device of claim 20, wherein
the control unit controls the sliding panel driving unit, such
that the foreign material removal roll separates the foreign
materials from the surface of the object by repeatedly
contacting and breaking contact with the object.
25
35
【Claim 22】
The foreign material removal device of claim 1, further
comprising: a discharging means disposed in the interior of the
housing, collecting the foreign materials guided to the
5 interior of the housing, and externally discharging the foreign
materials.
【Claim 23】
The foreign material removal device of claim 22, wherein
10 the discharging means includes:
a collecting part disposed in a width direction of the
housing, and having a plurality of holes formed in a side of
the collecting part toward the foreign material separating
means to intake the foreign materials; and
15 a discharging part connected to one end portion of the
collecting part to provide intake force, and externally
discharging the foreign materials intaken by the collecting
part.
20 【Claim 24】
The foreign material removal device of claim 23, wherein
the collecting part is provided in the form of a pipe having
a hollow portion, and is formed to be tapered, such that the
internal diameter of the hollow portion decreases from the one
25 end portion to the other end portion of the collecting part.
36
【Claim 25】
The foreign material removal device of claim 1, wherein
the object is provided as a strip transfer roll on which strip
5 steel passes.