KR100752519B1 - Foreign substance removing device - Google Patents

Abstract

An apparatus for removing foreign substances, which can reduce the operation load of a worker and can increase the productivity by improving the structure of a lower part of chute gates of a bunker hopper, thereby increasing the removal efficiency of foreign substances and eliminating a main impediment cause of charging and coal collecting facilities, is provided. An apparatus for removing foreign substances comprises: a bunker hopper(100); chute gates(2,2a) mounted on a lower part of the bunker hopper and interlocked with the starting of an actuator(1) such that the chute gates can be opened or closed; a foreign substance filtering part installed below the chute gates and interlocked with opening and closing actions of the chute gates to filter foreign substances mixed with coal discharged from the chute gates; a foreign substance removing part interlocked with an opening action of the chute gates to move foreign substances filtered by the foreign substance filtering part; and a foreign substance storing part(7) installed at one side of the foreign substance removing part to store the foreign substances filtered by the foreign substance filtering part. The foreign substance filtering part includes bunker gate gears(3,3a,4,4a), pinion gears(5,5a), rack gears(6,6a), and a screen(8). The foreign substance removing part includes a scraper(11), and a driving part comprising drum supports(15,15a), a wire drum(12) and a cylinder(14).

Description

Foreign Material Removal Device {FOREIGN SUBSTANCE REMOVING DEVICE}

1 is a view showing a hopper foreign matter removal operation according to the prior art.

Figure 2 is a coupling diagram showing the configuration of the foreign matter removal apparatus according to an embodiment of the present invention.

Figure 3 is an exploded view showing the configuration of the foreign matter removal apparatus according to an embodiment of the present invention.

4 is a view showing the screen and the scraper configuration of the foreign material removing apparatus according to an embodiment of the present invention.

5 is an operation state diagram of the foreign matter removal apparatus according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

One ; Actuators 2, 2a; Chute gate

3, 3a, 4, 4a; Bunker gate gear 5, 5a; Pinion gear

6, 6a; Rack gear 7; Foreign substance storage

7a; Liner sensor 8; screen

8a, 8b, 8c, 8d; Guide roller 9; Vibration part

10; Base members 10a, 10b, 10c, and 10d; spring

11; Scraper 12; Wire drum

13; Rack gear 14; cylinder

15, 15a; Drum support 100; Bunker hopper

101; Screen 103; Way hopper

105; Charging vehicle hopper 105a; Bunker gate

The present invention relates to a debris removal device, and more particularly, to easily remove various debris introduced into the bunker hopper when coal is fed into the hopper for the basis weight of coal in a coke oven, and the iron liner dropping off the side of the chute wall. The present invention relates to a foreign matter removal device that can be removed.

1 is a view showing a hopper foreign matter removal operation according to the prior art.

Referring to FIG. 1, the operation of the chute gates 2 and 2a positioned below the bunker hopper 100 is an unmanned automatic operation device that is made as the actuator 1 is driven and the bunker gate gear is rotated. In this relationship, the chute gates 2 and 2a can be opened and operated continuously even when foreign matter (dropped liner) falls on the screen 101.

On the other hand, coal that is transferred from the coal yard (YARD) and then stored in the bunker hopper 100 through the COAL MOISTURE CONTROL SYSTEM is introduced into each foreign material (for example, iron pieces, chips, cloth, cables, rubber plates). ), And so on. In addition, a phenomenon in which the chute wall liner and the call bunker synthetic liner of the coal transportation line is dropped due to the fixed bolt wear occurs and is charged into the coal mining carbonization chamber of the way hopper 103.

When these foreign matters are charged to the coal mining chamber of the way hopper 103, the coke quality is affected during the coking process.

In addition, when the coal in the bunker hopper 100 is coal-loaded into the hopper 105, the liner (foreign material) dropped out of the bunker gate 105a takes a lot of time for action, thereby increasing productivity due to delay in operation. A problem occurs.

In addition, when coal is discharged to the bottom and coal is accumulated on the dropped liner, the connection of the wire 101a supporting the screen 101 is dropped by the load. In addition, the case of losing the role of the screen 101 frequently occurs, and the worker must remove the handle using a hook to pull out the dropped liner.

As described above, the removal of foreign matter from the hopper hopper according to the related art has a problem of causing an increase in productivity due to delay of work load and action work.

It is an object of the present invention to improve the chute gate lower configuration of the bunker hopper to increase the efficiency of the foreign matter removal operation to reduce the work load of the operator, to provide a foreign matter removal device that can increase productivity by eliminating obstacles to charging coal mining equipment. .

In order to achieve the above object, the present invention is mounted on the bottom of the bunker hopper, bunker hopper, the chute gate is opened and closed in conjunction with the actuation of the actuator, is installed in the chute gate lower and linked to the opening and closing operation of the chute gate, Foreign substance filtering unit for filtering foreign substances mixed in coal discharged from the coal, foreign matter processing unit for moving the foreign matter filtered in the foreign matter filtering unit in conjunction with the opening operation of the chute, foreign matters installed in one side of the foreign substance processing unit and filtered through the foreign substance filtering unit It is preferable to include a foreign matter storage unit for storing.

In the above configuration, it further comprises a base member mounted to the lower portion of the chute gate, foreign matter filtering portion is installed in the base member can be moved along the base member in conjunction with the chute gate opening operation.

The foreign matter filtration part is axially coupled to both sides of the chute gate, and is connected to both sides of the chute gate to the bunker gate gear rotated in conjunction with the actuation of the actuator, and the pinion gear and the pinion gear meshing with the bunker gate gear, Lacquer gears arranged in both longitudinal directions and connected to pinion gears and connected to both ends of the rack gear, respectively, are installed at the lower part of the chute gate, and are moved to the lower part of the chute gate when the actuator is started to filter foreign substances mixed with coal. It may include a screen.

It may be mounted to the foreign matter storage unit, the sensor may further include a sensor for detecting the foreign matter flowing into the foreign matter storage unit.

A guide rail may be installed in the longitudinal direction of the base member.

The guide rail includes a first guide rail formed on the front side in the longitudinal direction of the base member and a second guide rail formed on the rear side of the first guide rail, wherein the first guide rail is higher than the position of the second guide rail. It can be located at.

Coupled to both sides of the screen, it may further include a guide roller which is moved along the guide rail.

The rack gear may include a first member in which a gear part is formed and a second member bent in a downward direction from the first member, and a pin hole may be formed in one end of the second member.

The screen has a first screen member formed in a first direction at a predetermined interval and a predetermined gap formed in a second direction intersecting the first screen member, and a groove through which coal passes in combination with the first screen member. It may include a second screen member to form a.

The first screen member may be formed of a rod, and the second screen member may be formed below the first screen member.

The apparatus may further include a vibration unit mounted on one side of the base member to apply vibration to the base member, and further including a vibration absorbing unit mounted on the bottom surface of the base member.

The foreign matter treatment unit may include a scraper and a driving unit for transmitting power to a scraper, which is supported by the base member, the one surface of which is in contact with the upper surface of the screen and is driven by the transmission of an external force, and moves along the upper surface of the screen to move the foreign matter placed on the upper surface of the screen. .

Guide rollers coupled to both sides of the scraper, the guide rail is mounted to the upper surface of the base member may further include a guide rail for guiding the movement of the guide roller.

Grooves contacting the first screen member may be formed on one surface of the scraper.

The driving unit is a drum support at which one end of each side is fixedly coupled to the upper surface of the base member, both sides are axially coupled to the drum support, a wire drum for winding a wire connected to a scraper, and a rod is connected to one side of the wire drum. It may include a cylinder for providing a rotational force to the.

Bearings may be coupled between the wire drum and both shafts of the drum support.

A rack gear is connected to the rod of the cylinder, and a pinion gear connected to the rack gear may be formed on the wire drum.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

Figure 2 is a combined view showing the configuration of the foreign material removing apparatus according to an embodiment of the present invention, Figure 3 is an exploded view showing the configuration of the foreign material removing apparatus according to an embodiment of the present invention.

The present invention is dropped from the wall of the bunker hopper (100) dropping or bunkers during the coal mining operation in the way hopper 103 for the basis weight (weight jam) work, which is a preliminary process of coal charging (COAL) in the coke oven (COKE OVEN) The present invention relates to an apparatus for filtering and removing various foreign matters (wood chips, cloth, cable rubber plates, chute wall liners, etc.) introduced into the hopper 100.

2 and 3, the foreign material removing apparatus according to an embodiment of the present invention includes a foreign material filtering unit, a foreign material processing unit, and a foreign material storage unit 7, and chute gates 2 and 2a of the bunker hopper 100. The foreign matter filter unit is installed in the lower part to separate the caught foreign matter into the foreign matter storage unit 7 through the foreign matter treatment unit to prevent foreign matter from entering the hopper 103.

The foreign matter filtration unit is mounted at the bottom of the bunker hopper 100 and is installed at the bottom of the chute gates 2 and 2a which are opened and closed in conjunction with the activation of the actuator 1. The foreign matter filtering unit is linked to the opening and closing operations of the chute gates 2 and 2a, and filters foreign substances mixed with coal discharged from the chute gates 2 and 2a.

The foreign material filtering portion includes bunker gate gears 3, 3a, 4, 4a, pinion gears 5, 5a, rack gears 6, 6a, and a screen 8.

The bunker gate gears 3, 3a, 4, 4a are axially coupled to both sides of the chute gates 2, 2a and rotated in conjunction with the activation of the actuator.

The pinion gears 5, 5a are coupled to the shafts 5-1 on both sides of the chute gates 2, 2a and are engaged with the bunker gate gears 3, 3a, 4, 4a.

The rack gears 6 and 6a are arranged in both longitudinal directions of the chute gates 2 and 2a above the pinion gears 5 and 5a and mesh with the pinion gears 5 and 5a. The rack gears 6 and 6a may include a first member having a gear portion and a second member refracted downward from the first member, and pin holes may be formed at one end of the second member. That is, referring to FIG. 3, in a state in which the pinhole 8-1 formed at one end of the second member and the pin hole 6-1 formed at one end of the screen 8 are placed at the mutually engaged position. Can be fastened with a pin.

The screen 8 is connected to both ends of the rack gears 6 and 6a, respectively, and is installed in a square shape at the bottom of the chute gates 2 and 2a, and the chute gates 2 and 2a when the actuator 1 is started. It moves to the bottom and filters foreign matter mixed with coal. The screen 8 is formed at a predetermined interval in a first screen member 81 formed in a first direction at a predetermined interval and in a second direction crossing the first screen member 81, and having a first screen member. And a second screen member 82 which, in combination with 81, forms a groove through which coal passes. The first screen member 81 may be formed of a rod, and the second screen member 82 may be formed under the first screen member 81.

In the above-described configuration, the embodiment of the present invention further includes a base member 10 mounted below the chute gates 2 and 2a, and the foreign matter filtration unit is installed in the base member 10 to allow the chute gates 2 and 2a to be installed. When the opening operation is interlocked can be moved along the base member 10.

Guide rails 10e and 10f may be installed in the longitudinal direction of the base member 10.

The guide rails 10e and 10f are the first guide rail 10e formed in the front side in the longitudinal direction of the base member 10, and the second guide rail 10f formed in the rear side of the first guide rail 10e. It includes, the first guide rail (10e) is located above the position of the second guide rail (10f).

And, the guide rollers 8a, 8b, 8c, 8d moving along the guide rails 10e, 10f are coupled to both sides of the screen 8. The guide rollers 8a, 8b, 8c, 8d coupled to the screen 8 are first guide rollers 8a, 8c and second which are moved along the first guide rail 10e formed in the base member 10. And second guide rollers 8b and 8d moved along the guide rail 10f.

With the above-described configuration, the screen 8 has an inclined angle with a constant inclination as shown in FIGS. 2 and 3 when coupled to the base member 10, and enables forward and backward reciprocating movement.

On the other hand, one side of the base member 10 further includes a vibration portion 9 for applying vibration to the base member 10, the vibration absorbing portion (10a, 10b, 10c, 10d) mounted on the lower surface of the base member 10 ) May be further included.

The vibrator 9 is configured to prevent clogging due to a foreign material jam when the bunker hopper 100 is mined, and may be mounted on the tip center upper portion of the base member 10.

In addition, the vibration absorbing portions 10a, 10b, 10c, and 10d may be configured as springs mounted on the lower surface of the base member 10 in a rectangular direction, and may freely vibrate by the activation of the vibrating portion 9. 8) Vibration vibration is applied so that coal falls well to the bottom.

The foreign matter treatment unit includes a scraper 11 and a driving unit, and moves the foreign matter filtered in the foreign matter filtering unit in conjunction with the opening operation of the chute gates 2 and 2a.

The scraper 11 is supported by the base member 10 so that one surface is in contact with the upper surface of the screen 8 and is driven by the transmission of an external force. The scraper 11 is moved along the upper surface of the screen 8 to move the foreign matter placed on the upper surface of the screen 8. Guide rollers 11c, 11d, 12e, and 12f are coupled to both sides of the scraper 11, and guide rails for guiding movement of the guide rollers 11c, 11d, 12e, and 12f to the upper surface of the base member 10 ( 11a, 11b) are formed.

Referring to FIG. 3, a pair of guide rollers 11c and 11d are inserted into the guide rail 11a on one side of the scraper 11 so that the up / down operation of the scraper 11 is smooth. And a pair of guide rollers 12e and 12f are inserted into the guide rail 11b also on the other side of the scraper 11. The guide rails 11a and 11b are rounded outward so that the guide rails 11a and 11b are turned down during the up operation of the scraper 11.

In addition, a groove 110 may be formed on one surface of the scraper 11 to contact the first screen member 81.

4 is a view showing the configuration of the screen 8 and the scraper 11 of the foreign matter removing apparatus according to an embodiment of the present invention.

Referring to FIG. 4, when the scraper 11 is down on the screen 8, a plurality of concave grooves 110 are formed at the bottom of the scraper 11 so that the first screen member 81 of the screen 8 is concave. The second screen member 82 of the screen 8 is fixedly welded to the lower portion of the first screen member 81 to be inserted into the groove 110. In this configuration, the groove 110 of the scraper 11 is not caught by the second screen member 82 when the groove 110 is moved in contact with the first screen member 81 of the screen 8.

The drive unit includes drum supports 15 and 15a, a wire drum 12, and a cylinder 14, and transmits power to the scraper 11.

Both ends of the drum supports 15 and 15a are fixedly coupled to the upper surface of the base member 10, respectively.

The wire drum 12 is axially coupled to the drum supports 15 and 15a and winds up a wire 12b connected to the scraper 11. A bearing may be coupled between the wire drum 12 and both rotation shafts of the drum supports 15 and 15a.

The cylinder 14 has a rod connected to one side of the wire drum 12, and provides rotational force to the wire drum 12. A rack gear 13 is connected to the rod of the cylinder 14, and a pinion gear 12a connected to the rack gear 13 may be formed in the wire drum 12.

In the above configuration, the cylinder 14 is supported by the drum supports 15 and 15a on both sides.

The foreign matter storage unit 7 is installed on one side of the foreign matter processing unit to store the foreign matter filtered through the foreign matter filtration unit.

Meanwhile, the exemplary embodiment of the present invention may further include a detection sensor unit 7a mounted on the foreign matter storage unit 7 and detecting a foreign matter introduced into the foreign matter storage unit 7.

5 is an operation state diagram of the foreign matter removal apparatus according to an embodiment of the present invention.

First, when coal in the bunker hopper 100 is coal mined in the charging vehicle hopper 105 by the opening of the bunker gate 105a, the charging vehicle again fills the bunker hopper 100 with coal.

At this time, when the actuator 1 is activated to open the chute gates 2 and 2a, the bunker gate gears 3, 3a, 4 and 4a are engaged with each other to rotate and the chute gates 2 and 2a are opened.

As shown in FIG. 5, when the bunker gate gears 3, 3a, 4, and 4a are rotated by the actuation of the actuator 1, the rotational force of the bunker gate gears 3, 3a, 4, and 4a is reduced by the pinion gear 5,. Delivered to 5a). That is, the bunker gate gears 3, 3a, 4, and 4a are rotated by the movement of the chute gates 2 and 2a which are connected to the actuator 1 to open and close the shaft. The pinion gears 5 and 5a fixed by (5-1) are engaged with the bunker gate gears 3 and 4 to rotate.

When the pinion gears 5 and 5a are rotated, the rack gears 6 and 6a arranged above the pinion gears 5 and 5a move in the longitudinal direction.

The screen 8 is connected to one end of the rack gears 6 and 6a. The movement of the rack gears 6 and 6a enables forward and backward reciprocation of the screen 8. As for the movement of the screen 8, the guide rollers 8a and 8c are moved along the 1st guide rail 10e formed in the base member 10, and the guide rollers 8b and 8d along the 2nd guide rail 10f. Is moved so that the screen 8 is moved with an inclination angle. When the screen 8 is moved to the lower portion of the chute gates 2 and 2a, foreign matter mixed and introduced into the coal is filtered out of the screen 8. When the vibrating unit 9 is moved during the movement of the screen 8, the vibrating unit 9 vibrates according to the starting of the vibrating unit 9 so that coal accumulated by foreign matter falls into the bottom of the bunker hopper 100.

In this state, the rack gear 13 connected to the rod of the cylinder 14 meshes with the pinion gear 12a located in the center of the wire drum 12, and the pinion gear (in accordance with the movement of the rack gear 13) 12a) is rotated. As the pinion gear 12a is rotated, the wire drum 12 is interlocked to rotate.

When the wire drum 12 is rotated, wires 12b connected to both sides of the scraper 11 are wound or unwound on the wire drum 12 according to the rotation direction of the wire drum 12.

If the chute gates 2 and 2a are in the open position, the cylinder 14 is operated, and the pinion gear 12a meshed with the rack gear 13 rotates the wire drum 12 to be connected to the scraper 11. The wire 12b is wound to lift the scraper 11.

On the contrary, when the wire 12b is wound on the wire drum 12 and released, the wire 12b is moved down by the weight of the scraper 11 and the concave groove 110 of the scraper 11 is formed on the first screen of the screen 8. It comes in contact with the member 81. In this state, when the screen 8 is moved to the bunker hopper 100 chute gate (2, 2a) portion, the screen 8 according to the contact state of the groove 110 of the scraper 11 and the first screen member 81 Foreign matter placed on it will be filtered out. As the chute gates 2 and 2a open, the scraper 11 presses on the screen 8 to store the filtered foreign matter in the foreign matter storage unit 7.

That is, when the screen 8 moves, the scraper 11 presses on the screen 8 to store foreign substances caught on the screen 8 when the bunker hopper 100 is coalesced in the previous process in the foreign matter storage unit 7. In this case, by using the vibration of the vibrator 9 and the inclination angle of the screen 8, foreign matters filtered by the screen 8 may be induced to fall well into the foreign matter storage unit 7.

When the liner dropped in the foreign matter storage unit 7 installed at the bottom of the screen 8 comes off, the detection sensor unit 7a detects the foreign material liner caught on the blade of the rotating rod and does not rotate to alarm the central cab. Will supply a signal.

Then, the central cab generates an alarm signal and informs the driver of the charging vehicle. In addition, when a large amount of foreign matter is filled in the foreign matter storage unit 7, the rotation is stopped by the rotation rod blades, and this state is also detected by the detection sensor unit 7a and is known to the driver.

When the mining of the bunker hopper 100 is completed, the chute gates 2 and 2a are closed by the activation of the actuator 1. At this time, the pinion gears 5 and 5a and the rack gears 6 and 6a move in opposite directions to the opening operation of the chute gates 2 and 2a. When the chute gates 2 and 2a are closed, the scraper 11 releases the wire 12b wound on the wire drum 12 again by the operation of the cylinder 14 so that the scraper 11 is adhered to the screen 8. Then, waiting for coal mining in the next process is prepared to separate the foreign matter into the foreign matter storage unit (7). At the same time, when the chute gates 2 and 2a are closed, the vibrator 9 is also stopped.

On the other hand, the detailed description of the present invention has been described with reference to specific embodiments, of course, various modifications are possible without departing from the scope of the invention.

In the above embodiment, the rotation method of the wire drum has been described as an indirect drive method, but a person skilled in the art may improve the rotation method of the wire drum differently.

For example, in the embodiment of the present invention has been described a configuration for engaging the pinion gear positioned in the center of the wire drum through a rack gear connected to the rod of the cylinder, provided with a separate cylinder for the rotation of the wire drum, By installing a drive motor on one side of the wire drum can be configured to rotate the wire drum directly. In addition, gears may be formed on both sides of the wire drum, and may be configured to mesh with gears connected to the motor.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below but also by the equivalents of the claims.

As described above, the foreign matter removal apparatus according to the present invention is mixed with the coal by introducing and entering the coal by removing various foreign substances introduced into the bunker hopper during coaling of the way hopper before charging into the coke oven carbonization chamber and the iron liner dropped from the side of the chute wall. It can improve the coke quality in the process of coking in the carbonization process of carbonization chamber by filtering foreign matter.

In addition, it prevents the work load caused by manual foreign material withdrawal work and the operation delay caused by action work by preventing the pinching of the gate due to the damming of the meshing network caused by the way hopper coal load and the breakage of the liner dropped in the bunker gate. In addition, the efficiency of productivity can be improved by eliminating the obstacles of the charging coal mining facility.

Claims (19)

Bunker hopper; A chute gate mounted to a lower portion of the bunker hopper, the chute gate being opened and closed in conjunction with the actuation of the actuator; A foreign material filtering unit installed under the chute gate and interlocked with the opening / closing operation of the chute gate and filtering foreign matter mixed with coal discharged from the chute gate; A debris processing unit for moving the debris filtered in the debris filtering unit in conjunction with the opening operation of the chute gate; Is installed on one side of the foreign matter processing unit, foreign matter removal apparatus including a foreign matter storage unit for storing the foreign matter filtered through the foreign matter filtration unit. The method of claim 1, And a base member mounted below the chute gate, wherein the foreign matter filtering unit is installed in the base member to move along the base member in conjunction with the chute gate when the chute gate is opened. The method of claim 2, The foreign material filtering unit A bunker gate gear that is axially coupled to both sides of the chute gate and rotates in association with the actuation of the actuator; A pinion gear axially coupled to both sides of the chute gate and engaged with the bunker gate gear; A rack gear disposed at both sides of the chute gate at an upper side of the pinion gear and engaged with the pinion gear; And a screen connected to both ends of the rack gear and installed at a lower portion of the chute gate to move the lower portion of the chute gate when the actuator is activated to filter foreign substances mixed with coal. The method of claim 1, The foreign matter removal device is mounted to the foreign matter storage unit, further comprising a detection sensor unit for detecting the foreign matter flowing into the foreign matter storage unit. The method of claim 3, The foreign material removal device that the guide rail is installed in the longitudinal direction of the base member. The method of claim 5, The guide rail A first guide rail formed on the front side in the longitudinal direction of the base member; The foreign material removal device including a second guide rail formed on the rear side of the first guide rail. The method of claim 6, The first guide rail is a foreign material removing device located above the position of the second guide rail. The method of claim 6, It is coupled to both sides of the screen, foreign matter removing apparatus further comprises a guide roller which is moved along the guide rail. The method of claim 3, The rack gear A first member having a gear portion; A second member refracted in a downward direction from the first member, The foreign material removal device is formed with a pin hole at one end of the second member. The method of claim 3, The screen is A first screen member formed in a first direction at a predetermined interval; And a second screen member formed at a predetermined interval in a second direction crossing the first screen member and forming a groove through which coal passes in combination with the first screen member. The method of claim 10, The first screen member is formed of a rod, and the second screen member is a foreign matter removal device is formed under the first screen member. The method of claim 2, And a vibration unit mounted on one side of the base member to apply vibration to the base member. The method of claim 12, And a vibration absorber mounted on the bottom surface of the base member. The method of claim 10, The foreign substance treatment unit A scraper supported by the base member, the one surface of which is in contact with the upper surface of the screen and driven by the transfer of external force, which moves along the upper surface of the screen to move the foreign matter placed on the upper surface of the screen; Debris removal device comprising a drive unit for transmitting power to the scraper. The method of claim 14, Guide rollers coupled to both sides of the scraper; And a guide rail mounted on an upper surface of the base member to guide the movement of the guide roller. The method of claim 14, One side of the scraper is foreign matter removal device is formed with a groove in contact with the first screen member, respectively. The method of claim 14, The driving unit A drum support on which one end of each side is fixedly coupled to an upper surface of the base member; A wire drum having both sides axially coupled to the drum support and winding a wire connected to the scraper; The rod is connected to one side of the wire drum, foreign matter removal apparatus comprising a cylinder for providing a rotational force to the wire drum. The method of claim 17, The foreign material removal device that the bearing is coupled between the wire drum and both rotation shafts of the drum support. The method of claim 17, A rack gear is connected to the rod of the cylinder, And a pinion gear connected to the rack gear in the wire drum.

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