KR940007177B1 - Method of removing impurities of galvanized sheets and apparatus therefor - Google Patents

Abstract

a pair of brush rolls (110a)(110b) for cleaning and grinding the basic steel material; upper and lower servomotors (131a)(131a') for adjusting the intervals between brush rolls (110a)(110b), which are positioned at the both sides of the brush rolls (110a)(110b); electric motors (145a)(145b) for rotating the brush rolls (110a)(110b), the universal joints (141a)(141b) respectively connecting between the electric motors (145a)(145b) and the brush rolls (110a)(110b); and a water supply device for injecting the water to be adjacent the brush rolls (110a)(110b).

Description

Removal method of foreign material of galvanizing material and device

1 is a configuration diagram for explaining the process (process) of a general galvanized steel pipe production equipment

2 is a configuration diagram showing the operating state of the pickling and washing equipment according to the prior art

3 is a block diagram showing a state in which a facility control computer is used to remove foreign substances in the galvanized steel pipe according to the present invention.

Figure 4 is a block diagram showing a state in which the foreign matter removing apparatus according to the present invention is mounted on a pickling and washing facility

Figure 5 is a flow chart (step chart) showing a step of removing foreign matter according to the present invention step by step

Figure 6 is an external perspective view showing a foreign matter removing apparatus according to the present invention

7 is a front view of the foreign matter removing apparatus according to the present invention

8 is an external perspective view showing a bearing block and a bearing block support of the foreign matter removing apparatus according to the present invention;

9 is a front view showing a state in which an end portion of a brush roll penetrates through a wall of a washing facility according to the present invention.

10 is a front view showing a side cover of the foreign matter removing apparatus according to the present invention

11 is a block diagram showing the positional relationship between the brush roll and the pure water supply device of the foreign matter removing apparatus according to the present invention.

* Explanation of symbols for the main parts of the drawings

100: foreign material removal device 110a, 1l0b: brush rol1

120a, l20a ': Roll control part 123a, l23b: Upper, lower bearing block

140a, 140b: Roll drive unit 14la, 141b: Universal Joint

145a, 145b: electric motor 320: welding machine

330: Scale Breaker 340: Pickling and washing equipment

S ₁ : Welding completion detection sensor S ₂ : Welding position detection sensor

DCS: Facility Control Computer SCC: Central Computer

The present invention relates to a method and apparatus for removing foreign matter (oxides, oxide stains, residual C1, rolled oil, etc.) attached to the front and back of the material steel sheet in the galvanized steel sheet production equipment, more specifically pickling and washing tank (Pickling) and galvanized steel pipe production equipment to prevent contamination by foreign matters inside the plating equipment and to improve the quality of products by automatically removing foreign matters attached to the front and back sides according to the characteristics of the material steel sheet in the Rinsing Tank. It relates to a method and a device for removing foreign substances.

In general, the galvanized steel pipe production equipment 300, which is made of hot rolled coil, has a coiled hot rolled steel sheet (H) in a pay-off reel 310 as shown in FIG. It is supplied to the welding machine 320, and after passing through the welding machine 320 enters the pickling and washing facility 340 in the state in which the scale is broken in the front and rear in the scale breaker 330, pickling (Pickling) After rinsing and rinsing, the dimensions are adjusted in the Side Trimmer 350, and the plating proceeds to the Funuce 360 and the Zinc Pot 370. The work is done. Then, the hot-rolled steel sheet (H) plated as described above passes through the air cooling device (380) and the water cooling device (390) to enter the rough mill (Skin pas mil1) (400) to correct the shape and smooth the roughness And after removing the internal stress, it is transferred to the after-treatment facility 410 to improve the corrosion resistance, and finally, the coil is wound in the tension reel (Tension reel) 420 to the desired galvanized steel pipe is completed production.

On the other hand, in the facilities for producing galvanized steel pipes as described above, the surface cleanliness of the hot rolled steel sheet (H) should be excellent before performing the galvanizing operation. If, when the foreign matter is attached to the front and rear continuously through the heating furnace 360 and the galvanizing bath 370, the plating adhesion is lowered and the interior of the heating furnace 360 and the galvanizing bath 370 If contaminants accumulate as mentioned above and contaminate the molten zinc, it is attached to the hot-rolled steel sheet (H) flowing in the next process to cause a defect of the product. Therefore, a pickling and washing facility 340 for cleaning the front and rear surfaces of the hot rolled steel sheet H before the introduction of the heating furnace 360 and the galvanizing bath 370 is essential.

A pickling and washing facility 340 that is generally used is a hydrochloric acid (342) in the pickling tank (341) while maintaining a constant level (Level) inside the pickling tank (341) as shown in FIG. After passing through to remove the iron oxide (Scale) attached to the front and rear, and then transferred to the subsequent washing tank (Rinsing Tank) (343). The cleaning tank 343 washes the hot rolled steel sheet H in three steps to remove hydrochloric acid components attached to the front and rear surfaces, thereby preventing secondary corrosion by hydrochloric acid remaining on the hot rolled steel sheet H, and maintaining surface cleanness. To make the plating work smoothly. First, the first tank 343a of the washing tank 343 is positioned adjacent to the pickling tank 341 and hydrochloric acid remaining in the hot rolled steel sheet H by inclining the hot rolled steel sheet H from the pickling tank 341. After dropping by gravity, hydrochloric acid in the back and front of the hot rolled steel sheet (H) is squeezed and removed by the ringer roll (345), and purified water is supplied through the pure water supply pipe (346). Sprayed, washed and then moved to tanks 343b and 343c two or three times.

In the second and third tanks (343b) (343c) to remove the maximum residual hydrochloric acid component by repeatedly spraying the pure water to the front and rear of the hot-rolled steel sheet (H) to remove a plurality of ringer rolls (345) Finally, the hot rolled steel sheet (H) is dried by transferring to a hot dryer (347).

On the other hand, in the process of performing continuous hot dip galvanizing operation of cold rolled steel sheet, the rolling oil sprayed during cold rolling on the front and rear sides of the cold rolled steel sheet should be removed in the pretreatment process before performing the hot dip galvanizing operation.

This is because the cold rolled steel plates are simply washed (rolled oil removed) using the brush roll in the pretreatment process, but these brush rolls are manually controlled without computer control, and the brush roll dimensions and roll intervals vary depending on the thickness of the cold rolled steel sheet. Only simple cleaning is done.

This is because when the galvanizing operation is performed while the rolling oil remains on the cold rolled steel sheet, the plating adhesion is significantly lowered, so that an alkaline solution is sprayed to the front and rear surfaces of the cold rolled steel sheet to remove the rolled oil, and then to the ringer roll 1. Weaving should be done 2-3 times.

However, in the pretreatment operation of the galvanized steel sheet carried out with hydrochloric acid as described above, the oxide layer is removed from the pickling tank 341, and the hydrochloric acid remaining in the hot-rolled steel sheet H is removed from the washing tank 343 as pure water, As 345, pure water and residual hydrochloric acid are squeezed to complete the work, but the finished hot-rolled steel sheet (H) has a difference in roughness and C1 components as shown in Table 1 on the front and rear surfaces.

TABLE 1

Roughness and Residual C1 Components in Pickled Hot Rolled Steel Sheets

* Unit: roughness (Ra), * C1: mg / m2

In particular, the residual C1 component degrades plating adhesion when the hot rolled steel sheet H passes through the galvanizing bath 370 of the heating furnace 360, and remains in the plating layer to generate defects. That is, the residual C1 component contaminates the equipment inside the heating furnace 360, deteriorates the atmosphere, and accumulates the residual C1 in the galvanizing bath 370, thereby causing a problem of continuously lowering the material of the plated steel sheet.

In addition, since the extent of the oxide layer remaining on the front and rear surfaces of the hot rolled steel sheet H is not constant in the width direction or the longitudinal direction, when the oxide layer is removed with hydrochloric acid, the roughness of the washed hot rolled steel sheet H is uneven. Since the size of the zinc crystal (Spangle) formed after the plating operation was to cause a non-uniform problem.

The present invention is to solve the above problems, to effectively remove the foreign matter, especially the C1 component attached to the material steel sheet used in the continuous molten zinc plating treatment equipment before the galvanizing operation to improve the plating adhesion, the plating equipment inside It is an object of the present invention to provide a method and apparatus for removing foreign substances from a galvanized steel sheet, which does not contaminate and secures uniformity of roughness so that the size of zinc crystals formed after plating is maintained uniformly.

In order to achieve the above object, the present invention, in the method of removing foreign matter adhering to the front and back of the material steel sheet in the pickling and washing process of the continuous zinc plating treatment equipment, by detecting the position of the welded portion of the material steel sheet to calculate the distance To clean and grind before and after galvanized steel pipes by controlling the brush roll spacing of the debris removal device located in pickling and washing facilities according to the weight, length, thickness, width and material of the steel sheet. By establishing a method for removing foreign substances.

In addition, the present invention is provided with a pair of brush rolls for cleaning and polishing the material steel sheet, by adjusting the distance between the brush rolls by the upper and lower servo motors on both sides of the brush roll, the electric for rotating the brush roll Connected via a motor or a universal joint, it is forward and reverse rotation, provided with a pure water supply device for injecting pure water adjacent to the brush roll to provide a foreign material removal device for removing foreign matter from the steel sheet.

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

As shown in FIG. 3, in order to remove foreign substances in the raw material steel sheet P according to the present invention, a central computer SCC used for the control of the galvanized steel sheet production facility 300 and the central computer SCC are shown. A facility control computer (DCS) provided with various information from the apparatus is used, and the foreign matter removing apparatus 100 of the present invention is mounted in the washing facility 343 of the pickling and washing facility 340. In addition, the welding machine 320 is equipped with a welding detection sensor (S1) for detecting the completion point of the melting point of the material steel sheet (P) and transmits a welding completion signal to the central computer (SCC) and the facility control computer (DCS), the welding machine 310 In front of the scale crusher 330 located at the rear end, a weld position detection sensor S2 for detecting a weld portion of the material steel sheet P and generating a weld detection signal with the facility control computer DCS is located. The computer (SCC) is equipped with a signal transmission device for supplying a variety of information of the weight, length, thickness, width, material, working methods of the material steel sheet (P), such a signal transmission device is a conventional transmission line (line) You can use In addition, from the facility control computer (DCS) to calculate the length of the material steel sheet (P), and to determine whether the automatic operation and also in parallel operation to transmit a signal to the foreign material removal apparatus 100 to be described in more detail below A signal transmission device is provided, and the foreign matter removing device 100 inside the pickling and washing facility 340 washes and polishes before and after the material steel sheet P according to various control information to remove foreign substances.

Hereinafter, with reference to Figure 5 will be described step by step the foreign matter removal method according to the present invention.

When the raw material steel sheet P enters the continuous zinc plating production facility 300, the welding machine 320 performs welding of the raw material steel sheet P, and when the welding is completed, the welding detection sensor S1 is the central computer (SCC). And the welding completion signal of the material steel plate (P) to the equipment control computer (DCS). When the welding completion signal is transmitted to the central computer (SCC), the central computer (SCC) transmits various information such as weight, length, thickness, width, material, work method, etc. of the material steel sheet (P) through a signal transmission line Store it in the facility control computer (DCS).

As the material steel sheet P gradually progresses, the weld position detection sensor S2 located in front of the scale crusher 330 detects the weld portion of the steel sheet P, and transmits the signal to the facility control computer DCS. Will transmit. At this time, the facility control computer DCS calculates the number of roll rotations of the scale crusher 330 from the moment of transmission, and continuously calculates the position of the welded portion of the material steel sheet P and the distance to the foreign matter removing device 100 to control the facility. Output to CRT of computer (DCS).

The distance calculation method used here is referred to as the distance from the weld position detection processor (S ₂ ) to the foreign matter removal device (100) as X, and the rotational speed of the scale crusher 330 * 2πR ("R": If radius) = Y, it calculates continuously until XY = 0. If XY = 0, that is, when the material steel sheet (P) reaches the debris removal device 100, will the driver automatically perform the operating conditions of the debris removal device 100 by using the facility control computer (DCS)? Alternatively, it is determined whether to use manual operation using the operation panel Pane1, which is performed by using a selector switch (not shown) provided in a cab (not shown), or an input key (not shown) of a facility control computer (DCS). Use C) to select and change on the CRT. Then, in the step of controlling the operating conditions of the foreign material removing apparatus 100, the interval of the brush (110a) (110b) of the brush of the foreign material removing apparatus 100 is adjusted according to the thickness and width of the material steel sheet (P), pure water supply Determine whether to operate the device 160, and adjust the forward and reverse rotation direction and the rotation speed of the brush roll (110a) (110b), while using the foreign matter removal unit (110a) (110b) in parallel, or alone It is determined whether or not to try to operate the foreign matter control device 100. On the other hand, when changing the operating conditions of the foreign material removing device 100 during the cleaning and polishing of the material steel sheet (P), that is, changing the interval between the brush roll (110a) (110b) of the facility control computer (DCS) It is controlled by the control, which is adjusted according to the thickness, width and material of the material. The spacing of these rolls is operated as thickness at 85% -98% of the thickness of the steel sheet P.

If there is a large amount of foreign material, the interval of 85% is maintained, and in the case of 98%, a small amount of foreign material is performed.

In addition, when it is necessary to change the rotational direction and the number of rotations or to switch to the single operation in parallel operation, the operation is appropriately changed using the facility control computer DCS. When the cleaning and polishing of the raw material steel sheet P is completed, the facility control computer DCS returns to the original state.

Next, the foreign matter removal apparatus 100 used in the present invention will be described. The foreign material removing apparatus 100 of the present invention has the same configuration as shown in FIG. 6, and the foreign material removing units 100a and 100b are installed in parallel in parallel. One of the foreign matter removal unit (100a) (100b) is used to remove the foreign matter in the material steel plate (P), the other foreign matter removal unit (100a) (100b) to repair or disable the used foreign matter removal unit If a condition occurs, it can be used instead of replacement, and during normal operation, any one of the plurality of foreign matter removal unit (100a) (100b) is operated, but if necessary, the simultaneous operation is possible, the foreign matter removal unit (100a) Since 100b is identical in configuration and effect to each other, only one of them will be described in more detail below. In order to clarify the foreign substance removing apparatus 100 of the present invention, the structure of the cleaning equipment 343 at the place where the foreign substance removing apparatus 100 is mounted will first be schematically described along the cross section.

The washing facility 343 is formed of acid-resistant bricks to have a rectangular cross-section and is formed on the left and right walls 343a and 343a 'formed of steel structures, and on the lower sides of the left and right walls 343a and 343a'. A water tank 343b constructed with acid resistant bricks for storing the wash water is located. An upper lid 343c operated by an air cylinder (not shown) is positioned at an upper portion thereof to form a rectangular cross-sectional shape.

The foreign material removal unit 100a according to the present invention has a pair of brush rolls (Brush Rol1) 100a and 110b passing the material steel sheet P therebetween in the washing facility 343 and the brush roll 110a. ) 110b is rotatably supported while having a roll control unit (120a, 120a ') to move up and down, and through the roll adjustment unit (120a, 120a') brush roll (110a) ( Roll drive unit (140a) (l40b) for forward and reverse rotation of 110b, while supplying pure water from the front and rear sides of the brush roll (110a) (110b) while washing the material steel sheet (P) brush roll ( It is equipped with a pure water supply device 160 to achieve a smooth rotation operation of 11Oa (11Ob). The brush rolls (110a, 110b) is made of a heat-resistant and acid-resistant material has a surface suitable for polishing the surface of the material steel sheet (P), each side end portion (112a), 112b is a washing facility (343) It passes through the left and right walls 343a and 343a 'forming a roll control unit 120a and 120a'.

At this time, both end portions 112a and 112b of the brush rolls 110a and l10b are left and right walls 343a and 343a 'formed on the upper and lower cutouts 114a and 114b. 115a) 115b is connected through a plurality of hinges 116 made of an acid resistant material and penetrates through a fixed center, and long holes 117a are disposed in the center of the repair covers 115a and 115b in the up and down directions. ) (117b) is formed so that the ends of the brush roll (110a) (110b) at a predetermined interval to form a space so that the upper and lower flows, the long hole (117a) Fixing tubes 118a and 118b are attached to upper corners of the side surfaces, and side covers 119a and 119b are suspended from the fixing tubes 118a and 118b to the bottom. The side cover (11la) (119b) is formed by overlapping with a line of several brush made of a synthetic resin strong acid resistance to effectively block the external leakage of the wash water through the long holes (117a, 117b), the repair Covers 115a and 115b are fixed with a locking device L, and both side ends 112a and 112b of the brush rolls 110a and 110b positioned outside the walls 343a and 343a 'are respectively. The synthetic flexi is covered with a flexible hose (F) to protect it from corrosion, and the flexi hose (F) extends to the bearing block, which will be described later.

On the other hand, the roll adjusting unit (120a) (120a ') having a bearing block for moving up and down while supporting the one end end (112a, 112b) of the brush roll (110a) (110b) rotatably, respectively, washing facility (343) Doors on the outside of the left and right walls 343a and 343a ' Bearing block supports 121a and 121a 'are positioned. The bearing block supports 121 and 121a 'are completely fixed to the floor by pedestals 122a and 122a' made of I-shaped steel, respectively, and inside the bearing block supports 121a and 121a '. Upper and lower bearing blocks 123a and 123b are positioned, respectively. The left and right side surfaces of the upper and lower bearing blocks 123a and 123b are formed with a predetermined length of the groove B in a longitudinal direction, and the bearing block supports 121a and 121a 'correspond to the groove B. At one side of the guide) is a guideclamp (125c) (125a ') of the bearing block guides (124a, 124a').

Each of the bearing block guides 124a and 124a 'has a pair of air cylinders 126a and 126a' fixed to both side frames D of the bearing block supports 121a and 121a ', respectively. 126a) 126a ') The guide clamps 125a and 125a ', which guide the upper and lower edges of the mold guide member G, are connected to each other and are fitted into the recesses B of the bearing blocks 123a and 123b. Accordingly, the bearing blocks 123a and 123b are operated by the air cylinders 126a and 126a 'so that the actuating rod is lowered toward the bearing blocks 123a and 123b by a pair of guide clamps 125a and 125a'. It is fixed. In addition, the upper surface U of the bearing block 123a is connected to one end of the rack (127a) formed with a screw thread is extended to the upper portion, only the other side of the rack (127a) bearing block support (121a) ( 121a ') extends upward through the center of the upper frame (E). As described above, the lower bearing block 123b is connected to one end of the rack 127b to the lower surface U 'and extends downward, and the other end of the rack 12 is bearing block supports 12la and 121a'. It extends downward through the center of the lower frame (E '). On the other hand, the ends of the rack 127a extending to the top of the bearing block support (121a) (121a '), respectively, in the pinion (not shown) inside the gear connecting portion (129a) fixed to the upper frame (E) The pinion is connected to the upper side rail 130a across the upper portion of the washing chamber ratio 343, respectively, the upper side rail 130a is capable of forward and reverse rotation and electrically operated upper servo motor 131a. Is connected to the axis. In addition, the upper side stand 130a is connected to the coupling 132a near both ends and is detachable. The coupling 132a is connected to each other using a cylindrical pipe member 133a and a plurality of pins 133b. do. The gear connecting portion 129a is a generally known structure in which the rack 127a and the pinion (not shown) are geared to each other inside the body portion, and the bolt is mounted on the upper frame E of the bearing block supports 12la and 121a '. It is firmly fixed by means of bolt. In addition, the threaded portion of the lower end of the rack 121b connected to the lower bearing block 123b is also connected to the pinion (not shown) through the gear connecting portion 129 'fixed to the lower frame E'. In the above, the structures of the gear connecting portions 129a and 129a 'use racks and pinions, but the present invention is not limited thereto, and a known gear reduction device using a bevel gear or the like is used. Of course it is okay.

The pinions are respectively connected to the lower side rail 130a 'penetrating the inside of the washing facility, the lower side rail 130a' is capable of forward and reverse rotation, and the shaft of the lower servo motor 131a 'that is electrically operated. Is connected to. On the other hand, the lower side rail (130a ') is protected by the acid-resistant pipe member 134 extending across the interior of the washing facility 343, the same as the upper cross (130a) via the coupling 132a' Both ends are detachably joined.

In addition, a limit switch 135a for detecting the lower limit position of the upper bearing block 123a is attached to the center portion of the bearing block supports 121a and 121a ', and the limit for detecting the upper and lower positions of the lower bearing block 123b is attached. The switch 135a 'is attached. When the upper and lower limit switches 135a and l35a 'reach the upper and lower bearing blocks 123a and 123b at a predetermined position to prevent the upper and lower brush rolls 110a and 110b from colliding with each other. It is configured to generate an electrical signal. On the other hand, near the both ends of the acid-resistant pipe member 134, an inner plate 136, which is inclined downward through the walls 343a and 343a ', is positioned, and the long holes 117a of the walls 343a and 343a' are positioned. The wash water dropped onto the hose (F) through the flexi through (117b) is guided to the water tank (343b) to be recovered

The roll driving units 140a and 140b for rotating the brush rolls 110a and 110b forward and reverse as needed are respectively extended through bearing blocks l23a and 123b of the roll adjusting units 120a and 120a '. The positive and reverse rotation electric motors 145a and 145b are connected to one side ends 112a and 112b of the brush rolls 110a and 110b, respectively, via a universal joint 141a and 141b. do. The electric motors 145a and 145b drive the brush rolls 110a and 110b in a forward or reverse direction according to an electric signal transmitted from the facility control computer DCS.

The universal joints 141a and 141b used in the above are well-known to transmit the rotational force of the electric motors 145a and 145b to the brush rolls 110a and 110b even when the shafts are not the same. Equipped with structure. On the other hand, during the rotation operation of the brush roll 110a (110b), since the pure water is continuously supplied during contact with the front and rear surfaces of the material steel sheet P, the cleaning effect and the polishing effect can be enhanced. The pure water supply device 160 is positioned adjacent to the rolls 110a and 110b. The pure water supply device 160 is a pure water supply pipe 164 having a plurality of injection nozzles 162 in the front and rear sides of each brush roll (110a, 110b) is the longitudinal direction of the brush roll (110a, 110b) Is installed along the extension, one side end 164a of the pure water supply pipe 134 is connected to the pure water pipe 166 installed outside the washing facility 343 through the wall 343a to supply pure water. At this time, the pure water supply pipe 164, as shown in Figure 11, the raw material steel by the brush roll (110a) (110b) as a supply port of pure water from the front and rear sides of each brush roll (110a) (110b) Improve the cleaning and polishing effect of (P).

Hereinafter, the operation and effects of the present invention will be described.

The raw material steel sheet P passing through the welding machine 320 enters the pickling facility 341, and the welding unit position information of the raw material steel sheet P detected by the welding position detecting sensor S2 is transferred to the facility control computer DCS. Is entered. Gradually, when the material steel sheet P proceeds to reach the foreign material removing device l00, information on the size, length, material, and thickness of the material steel sheet P stored by the facility control computer ⒧CS, and the position of the welded portion The foreign material removing apparatus 100 is driven by the information.

Various signals transmitted from the facility control computer (DCS) to the debris removal device 100 include one of the upper and lower servomotors 131a and 131a 'of the roll control unit 120a and 120a'. Rotate or reverse. In this case, the upper and lower servomotors 131a and 131a 'may be rotated at the same time or may be independently rotated. The rotation operation of the upper and lower servomotors 131a and 131a 'connects the pinions respectively, and the racks 127a and 127b geared to the pinions at the gear connecting portions 129a and 129a' are respectively upper and lower. Will move down. Accordingly, the upper and lower bearing blocks 12a and 123b are moved up and down in the bearing block supports 121a and 121a ', and the brush rolls 110a and 110b are moved up and down. At this time, the upper and lower bearing blocks 123a and 123b move upward and downward along the guide clamps 125a and 125a 'of the bearing block guides 124a and 124a'. The air cylinders 126a and 126a 'of the bearing block guide parts 124a and 124a' respectively push the actuating rods to the bearing blocks 123a and 123b to guide guides 125a into the recesses B. Of course, the 125a 'is held in the fitted state. As the bearing blocks 123a and 123b move up and down, both end portions 112a and 112b of the brush rolls 110a and 110b are hung on the walls 343a and 343a 'of the washing facility 343. It moves up and down within the long hole 117a (11 city). On the other hand, when the air cylinders 126a and 126a 'retract the operating rod and detach the loader guide clamps 125a and 125a' from the groove B, the brush rolls 110a and 110b are used during maintenance. ), The air cylinders 126a and 126a 'should always be maintained in a state in which the guide lamps 125a and 125a' are coupled to the groove B. If the distance between the brush roll (110a) (110b) is properly adjusted in accordance with the information of the material sheet (P) to remove the foreign matter as described above, another signal transmitted from the facility control computer (DCS) is calculated In accordance with this, the electric motors 145a and 145b are rotated to rotate the brush rolls 110a and 110b forward or reversely.

The universal joints 141a and 141b connected to the axes of the electric motors 145a and 145b rotate one end portions 112a and 112b of the brush rolls 110a and 110b, respectively, and the brush rolls 110a and (b). 110b is rotated while maintaining an appropriate level through the bearing blocks 123a and 123b. In addition, pure water is supplied to the pure water supply pipe 164 of the pure water supply device 160, and pure water is continuously supplied to the brush rolls 110a and 110b through the injection nozzle 162, at which time the brush roll 110a ( The material steel sheet P enters between 110b), and cleaning and polishing are performed by brush rolls 110a and 110b. In the above, a method of automatically removing a foreign matter using a facility control computer (DCS) has been described, but the foreign matter removing device 100 may be operated by a manual operation of a driver.

This work is performed by the operator checking the number of revolutions of the brush furnace 110a (110b) or the interval between the brush rolls 110a and 110b displayed on the CRT (not shown) of the facility control computer (DCS). This is achieved by applying correction in accordance with the surface condition of (P). In other words, by manually driving the upper and lower servo motors (131a, 131a ') in the operation panel (Pane1) (not shown) installed in the field to adjust the distance between the brush roll (110a, 110b), or electric The rotation speed of the motors 145a and 145b is increased or decreased to achieve more effective cleaning and polishing operations.

According to the present invention as described above, by uniformly roughening the raw material steel sheet (P) by washing and polishing the raw material steel sheet (P) by brush roll (11Oa) (110b), zinc crystal (Spangle) after plating By minimizing the size deviation of), galvanized steel sheet of good quality can be obtained. In addition, since the C1 component remaining in the material steel sheet P is reduced to 1 mg / m 2 or less, even when the material steel sheet P passes through the heating furnace 360 or the zinc plating bath 370, It does not deteriorate the atmosphere and does not contaminate the molten zinc, so that the poor plating of the material steel sheet P is remarkably improved.

In addition, according to the present invention, since the intervals or rotational speeds of the brush rolls 11Oa and 11Ob can be additionally adjusted according to the change in the moving speed of the material steel sheet P, the surface of the material steel sheet P is very uniformly polished. In addition, the automatic operation by the use of the equipment control computer (DCS) is made is an advantage that can be performed very effectively the pretreatment process before the galvanizing operation.

In addition, the degree of polishing of the material steel sheet (P) is changed according to the material of the brische roll (11Oa) (110Ob), this is applied when changing the surface roughness of the finished material steel sheet (P), in a process that does not require polishing It is possible by changing only the material of the brush roll (110a) (110b) of the structure of this invention.

Claims (11)

In the pickling and washing process of the continuous zinc plating treatment equipment, the foreign material adhering to the front and rear surfaces of the material steel sheet P is removed. The distance of the welded portion of the material steel sheet P is detected and the distance is calculated. Material steel sheet before the galvanizing operation by controlling the interval between the brush roll (110a) (110b) of the debris removal device 100 located in the pickling and washing facility 340 according to the weight, length, thickness, width and material of P) ( P) Removal of foreign substances, characterized by cleaning the front and rear, polishing. According to claim 1, wherein the step of adjusting the interval of the brush roll (110a) (110b) to adjust the interval of the brush roll (110a) (l10b) at an interval of 85-98% with respect to the thickness of the material steel sheet (P). Removing foreign matters characterized in that. The method of claim 1, wherein the controlling of the operating conditions of the foreign matter removing device comprises determining whether the pure water supply of the pure water supplying device is possible. The method of claim 1, wherein the controlling of the operating conditions of the foreign matter removing apparatus 100 includes removing the foreign matters of the brush rolls 110a and 110b by calculating the forward and reverse rotation speeds. Way. The method of claim 1, wherein the controlling of the operating conditions of the foreign substance removing apparatus (100) comprises determining whether to drive the parallels of the foreign substance removing units (100a) (100b). In a device for removing foreign matter attached to the front and back of the material steel sheet (P) in the pickling and washing process of the continuous zinc plating treatment equipment, a pair of brush rolls (110a) (110b) for cleaning and polishing the material steel sheet (P) ), And adjust the distance between the brush roll (110a) (l10b) by the upper and lower servomotors (131a, 131a ') on both sides of the brush roll (110a) (l10b), the brush roll ( The electric motors 145a and 145b for rotating the 110a and 110b are connected via the universal joints 141a and 141b, and are rotated forward and backward, and adjacent to the brush rolls 110a and 110b. Foreign material removal method characterized in that to remove foreign substances in the material steel sheet (P) by equipping the pure water supply device (160) for spraying 7. The upper and lower bearing blocks 123a of claim 6, wherein racks 127a and 127b and pinions are interposed between the brush rolls 110a and 110b and the upper and lower servo motors 131a and 131a '. Removing foreign substances, characterized in that the interval between the brush roll (110a) (10b) by adjusting the (123b) up and down 8. The upper and lower bearing blocks 123a and 123b are controlled by the lower limit position and the upper limit position by limit switches 135a and 135a 'attached to the bearing block supports 121a and 121a'. Foreign material removal method characterized in that The wall covers 343a and 343a 'through which both side ends 112a and 112b of the brush rolls 110a and 110b pass through the side covers 119a and 119b made of synthetic resin. The foreign matter removal method, characterized in that to prevent the external leakage of the wash water. 7. The foreign material according to claim 6, wherein the driving of the upper and lower servo motors 131a and 131a 'and the electric motors 145a and 145b is controlled according to a signal transmitted from a control computer DCS. How to remove. 7. The method of claim 6, wherein the driving of the upper and lower servomotors (131a) (131a ') and the electric motors (145a) (145b) is adjustable by manual operation of the driver.