KR101225795B1 - Apparatus for preventing upward movement of front part of strip - Google Patents

Abstract

The present invention relates to a device for preventing upward of a strip, comprising: a feed roller portion for transferring a strip sent out from a finishing mill, a frame portion positioned above the feed roller portion, and a frame portion for spraying fluid toward the strip; An electromagnet roller having a sander, a moving part provided in the frame part and moving the frame part up and down, and a control part for controlling the operation of the injection part and the moving part, and the feed roller part having an electromagnet part for generating electromagnetic force to correct upward of the strip. It is characterized by including.
According to the present invention, it is possible to prevent the front end of the strip sent out from the finishing mill through the injection unit for injecting high-pressure fluid and the electromagnet roller generating the electromagnetic force to solve the problem of poor strip quality such as overlapping the strip. Can be.

Description

{APPARATUS FOR PREVENTING UPWARD MOVEMENT OF FRONT PART OF STRIP}

The present invention relates to a device for preventing upward of a strip, and more particularly, to a device for preventing upward of a strip which can improve the quality of the product by preventing the leading end of the strip sent out from the finishing mill.

Typical steelmaking consists of a steelmaking process to produce molten iron, a steelmaking process to remove impurities from molten iron, a continuous casting process to make solid iron into solid, and a rolling process to make iron into steel or wire.

The rolling process is a process of passing an intermediate material such as a slab, a bloom, etc. produced in a continuous casting process through a plurality of rotating rollers and applying a continuous force to increase or decrease the thickness thereof. The rolling process is roughly classified into hot rolling and cold rolling.

The technical structure described above is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

It is an object of the present invention to provide an apparatus for preventing upstream of a strip that can prevent the tip of the strip from being fed from the finishing mill to be raised to improve product quality.

An apparatus for preventing upward of a strip according to an aspect of the present invention includes: a feed roller unit for transferring a strip sent from a finishing mill; A frame part positioned above the feed roller part; An injection part provided in the frame part and injecting a fluid toward the strip; A moving part provided in the frame part and moving the frame part up and down; And a control unit for controlling the operation of the injection unit and the moving unit, wherein the transfer roller unit has an electromagnet roller having an electromagnet unit for generating an electromagnetic force to correct upward of the strip.

More preferably, the sensor further comprises a detection sensor disposed on the exit side of the finishing mill to detect that the strip is sent from the finishing mill, the detection sensor is configured to send a detection signal to the controller when the transmission of the strip is detected; The control unit controls the operation of the injection unit and the electromagnet roller based on the detection signal.

More preferably, further comprising a protective roller rotatably installed in the frame portion, the bottom of the protective roller is disposed below the lower end of the injection portion.

More preferably, the moving unit, the driving unit coupled to the frame portion; A rotary gear part connected to the driving part and rotated by driving of the driving part; And a rack gear part engaged with the rotary gear part and guiding the vertical movement of the rotary gear part.

More preferably, a plurality of the electromagnet rollers are arranged on the outlet side of the finishing mill, and the control unit sequentially operates the electromagnet rollers, starting with the electromagnet rollers disposed closest to the finishing mill.

More preferably, a plurality of the electromagnet portion is disposed on the electromagnet roller at the same rotation angle interval with respect to the center of rotation of the electromagnet roller.

More preferably, a plurality of the protective rollers are arranged in the conveying direction of the strip, and the injection portion is disposed between the protective rollers, respectively.

More preferably, the injection unit comprises a supply pipe for receiving a fluid from an external source; A discharge pipe communicating with the supply pipe and arranged in plurality in a width direction of the strip; And a nozzle in communication with the discharge pipe and injecting the fluid supplied from the discharge pipe toward the strip.

More preferably, the distance between the nozzle disposed on the outermost side of the one side and the nozzle disposed on the outermost side of the other side is the same as the width of the feed roller.

According to the present invention, it is possible to prevent the front end of the strip sent out from the finishing mill through the high-pressure fluid injected from the injection unit, thereby solving the problem of poor strip quality such as overlapping the strip.

In addition, since the front end of the strip sent out from the finishing mill can be corrected by the electromagnet provided in the electromagnet roller, it is possible to solve the problem of poor strip quality such as strip overlap.

In addition, since the upper end of the strip is prevented, measurement data such as temperature, thickness, and width of the strip can be accurately measured, thereby improving control performance.

In addition, since problems such as overlapping strips can be solved, durability of the winding equipment can be improved.

In addition, since the injection roller is prevented from colliding with the strip by the protection roller, it is possible to prevent degradation of durability due to the collision, thereby achieving time and material cost reduction in terms of maintenance and repair of the facility.

In addition, since the fluid starts to be injected from the injection unit when the strip is discharged from the finishing mill, unnecessary use of the fluid can be prevented.

1 is a view schematically showing a device for preventing the upward of the strip according to an embodiment of the present invention.
2 is a view showing a state in which part I of the electromagnet roller is operated in the upward prevention device of the strip according to the embodiment of the present invention.
3 is a view showing a state in which part II of the electromagnet roller is operated in the upward prevention device of the strip according to an embodiment of the present invention.
4 is a view showing a state in which part III of the electromagnet roller is operated in the upward prevention device of the strip according to an embodiment of the present invention.
Figure 5 is a bottom view schematically showing a state in which the injection portion and the protective roller is installed in the upward prevention device of the strip according to an embodiment of the present invention.
Figure 6 is a perspective view showing the relationship between the injection portion and the protection roller in the upward prevention device of the strip according to an embodiment of the present invention.
Figure 7 is a side view showing the relationship between the injection portion and the protective roller in the upward prevention device of the strip according to an embodiment of the present invention.
8 is a view schematically showing the injection unit in the upward prevention device of the strip according to an embodiment of the present invention.
9 is a view schematically showing the electromagnet roller in the apparatus for preventing the upward of the strip according to an embodiment of the present invention.
10 is a cross-sectional view schematically showing the electromagnet roller in the device for preventing the upward of the strip according to an embodiment of the present invention.
11 is a block diagram showing the control flow of the device for preventing the upward of the strip according to an embodiment of the present invention.

Hereinafter, an embodiment of an apparatus for preventing upward of a strip according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

Further, terms to be described below are defined in consideration of the functions of the present invention, which may vary according to the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a view schematically showing a device for preventing the upward of the strip according to an embodiment of the present invention. Figure 2 is a view showing a state in which the part I of the electromagnet roller in the apparatus for preventing the upward of the strip according to an embodiment of the present invention, Figure 3 is an electromagnet roller in the apparatus for preventing the upward of the strip according to an embodiment of the present invention 4 is a view showing a state in which part II of the operation, Figure 4 is a view showing a state in which the part III of the electromagnet roller in the upward prevention device of the strip according to an embodiment of the present invention. Figure 5 is a bottom view schematically showing a state in which the injection portion and the protective roller is installed in the apparatus for preventing upstream of the strip according to an embodiment of the present invention, Figure 6 is a top view preventing apparatus for the strip according to an embodiment of the present invention Figure 7 is a perspective view showing the relationship between the injection portion and the protective roller, Figure 7 is a side view showing the relationship between the injection portion and the protective roller in the upward prevention device of the strip according to an embodiment of the present invention, Figure 8 is an embodiment of the present invention Figure is a schematic diagram showing the injection portion in the upward prevention device of the strip. FIG. 9 is a view schematically showing an electromagnet roller in an apparatus for preventing upward of a strip according to an embodiment of the present invention, and FIG. 10 is a cross-sectional view schematically showing an electromagnet roller in an upward prevention apparatus for a strip according to an embodiment of the present invention. to be. 11 is a block diagram showing the control flow of the device for preventing the upward of the strip according to an embodiment of the present invention.

1, 5 and 11, the apparatus for preventing upward of the strip 1 according to an embodiment of the present invention is the frame portion 10, the injection portion 20, the moving portion 30, the protective roller ( 40), the feed roller unit 50, the control unit 60, the sensor comprises a 61.

The frame part 10 is disposed at the outlet side of the finishing mill F, and is located above the feed roller part 50 for transferring the strip S sent from the finishing mill F to a post process. The frame unit 10 includes an installation frame 11, a vertical frame 12, and a horizontal frame 13.

The installation frame 11 is arranged side by side in the transport direction of the strip (S) with the protective roller 40 therebetween. The protective roller 40 is hinged (h) at one end to the installation frame 11 on one side, and hinged (h) at the other end to the installation frame 11 on the other side, so as to be rotatable to the installation frame 11 as a whole. Is installed.

In addition to the protective roller 40, the spraying unit 20 is installed in the installation frame 11. The injection unit 20 is installed in the installation frame 11 alternately with the protective roller 40. That is, when the plurality of protective rollers 40 are installed in the installation frame 11 to be arranged in the conveying direction of the strip S, in other words, in the longitudinal direction of the strip S, the injection part 20 is the protective roller 40. It is installed in the installation frame 11 to be disposed between each. Like the protective roller 40, the injection unit 20 may be installed in a plurality of installation frame (11).

The vertical frame 12 is coupled to one end (left reference end of FIG. 1) and the other end (right end of FIG. 1) of the installation frame 11, respectively, and extends upwardly therefrom. The installation frame 11 and the horizontal frame 13 are connected by the vertical frame 12.

The upper end of the vertical frame 12 on one side (left) is coupled with one end (left end) of the horizontal frame 13, and the upper end of the vertical frame 12 on the other side (right) is the other end (right side) of the horizontal frame 13. Combined with).

The horizontal frame 13 connects the vertical frame 12 on one side and the vertical frame 12 on the other side to support each vertical frame 12 so as not to shake.

The moving part 30 is installed in the center of the horizontal frame 13. By the operation of the moving unit 30, the horizontal frame 13 is moved up and down, and thus the injection unit 20 installed in the installation frame 11 is also moved up and down.

1, 5 to 8, and 11, the injection unit 20 is installed in the installation frame 11, to spray the fluid toward the upper portion of the strip (S) to prevent the upward of the strip (S). do. Such fluid may be air.

The injection unit 20 includes a supply pipe 21, a discharge pipe 22, and a nozzle 23, and a plurality of injection units 20 are disposed between the protection rollers 40. The operation of the injection unit 20 is controlled by the control unit 60.

The supply pipe 21 receives fluid from an external source (not shown), and branches from the external source and extends between the protective rollers 40, respectively.

The discharge pipe 22 communicates with the supply pipe 21, is branched into a plurality from one supply pipe 21, and arranged side by side in the width direction of the strip S. The discharge pipe 22 is installed in the installation frame 11 by the mounting portion 11a.

The nozzle 23 communicates with the discharge pipe 22 and sprays the fluid supplied through the supply pipe 21 and the discharge pipe 22 toward the upper portion of the strip S to prevent the strip S from being upward.

The distance between the nozzle 23a disposed at the outermost side of the one side and the nozzle 23b disposed at the outermost side of the other side is equal to the width of the feed roller unit 50. Therefore, it is possible to spray the fluid evenly to the front end of the strip (S) narrower than the width of the feed roller 50.

The strip S sent from the finishing mill F, in particular, a strip S having a thin thickness, may be upwardly generated due to a speed difference between upper and lower work rolls of the finishing mill F, and an upwardly generated strip. (S) may be more severe due to the air resistance generated during the transfer.

At the time when the upward movement of the strip S occurs, the upward movement of the strip S is suppressed by injecting a high pressure fluid upwardly through the strip S through the injection unit 20. In addition, when the upward direction of the strip (S) is generated by continuously injecting a high-pressure fluid through the injection unit 20 it is possible to gradually reduce the degree of upward of the strip (S) to the flat state (S) Allow entry into the process.

This can solve the problem of poor quality of the strip (S) due to the overlap of the strip (S), it is possible to block the degradation of the durability of the winding equipment occurs when the overlapping strip (S) is wound. Of course, as the upper end of the strip S is prevented, measurement data such as temperature, thickness, and width can be measured accurately, thereby improving control performance.

1, 2 and 12, the detection sensor 61 is disposed on the outlet side of the finishing mill (F) to detect that the strip (S) is sent from the finishing mill (F).

The detection sensor 61 transmits a detection signal to the control unit 60 when transmission of the strip S is detected at the outlet side of the finishing mill F. FIG. The controller 60 controls the operation of the injection unit 20 based on the transmitted detection signal. That is, since the control unit 60 operates the injection unit 20 only when the delivery of the strip S is detected, the control unit 60 can suppress the injection of the fluid in an unnecessary situation.

The moving part 30 is coupled to the center portion of the horizontal frame 13 and moves the entire frame part 10 up and down by moving the horizontal frame 13 up and down. The moving part 30 includes a driving part 31, a rotary gear part 32, and a rack gear part 33.

The driving unit 31 is installed in the horizontal frame 13 to generate power for rotating the rotary gear unit 32. The driving unit 31 includes a driving motor for generating power, and supplies the generated power connected to the rotary gear unit 32 to the rotary gear unit 32. The operation of the driver 31 is controlled by the controller 60.

The rotary gear unit 32 is connected to the driving unit 31 and rotated by the power generated by the driving unit 31. The rotary gear part 32 may be a pinion gear.

The rack gear part 33 is configured to engage with the rotary gear part 32 to guide the vertical movement of the rotary gear part 32 according to the rotation of the rotary gear part 32. To this end, the rack gear part 33 is provided with a guide part (not shown) to prevent the separation of the rotary gear part (32).

The rack gear portion 33 is fixed to the support (C). The support C may be another adjacent device that can prevent the rack gear part 33 from shaking when the moving part 30 is operated. For example, it may be a roller table that supports the feed roller unit 50.

In this embodiment, the driving unit 31 is installed in the horizontal frame 13, the rack gear unit 33 is illustrated as being fixed to the support (C), but is not limited thereto. Therefore, the driving unit 31 is fixed to the support (C), the rack gear unit 33 is configured to be installed in the horizontal frame 13, various modifications for the vertical movement of the moving unit 30 is possible, of course. .

1, 5 to 8, the protective roller 40 is hinged to each of the pair of mounting frame 11 (h) is installed rotatably on the mounting frame (11). The plurality of protective rollers 40 are arranged in the conveying direction of the strip S.

The lowermost surface of the protective roller 40 is disposed below the nozzle 23 which forms the lowest end of the injection part 20. Therefore, even when the strip (S) is abnormally transported and bounces upward, the protective roller (40) is contacted before colliding with the spraying unit (20), thereby preventing the spraying unit (20) from being damaged by the strip (S). Can be.

In addition, since the protective roller 40 is rotatably installed in the installation frame 11, even if the strip S is in contact with the protective roller 40, the feed speed does not decrease.

1, 9 to 11, the feed roller unit 50 transfers the strip (S) rolled by the finishing mill (F) to a later process. The conveying roller part 50 is provided with the electromagnet roller 51 which has the electromagnet part 52 which produces | generates an electromagnetic force so that the upward direction of the strip S may be correct | amended. A plurality of electromagnet rollers 51 are arranged in succession on the outlet side of the finishing mill (F).

The electromagnet portion 52 is provided in plural in a line along the width direction of the electromagnet roller 51. The electromagnet unit 52 generates an electromagnetic force under the control of the controller 60, and consists of an iron core core and a coil surrounding the same. The electromagnetic force is proportional to the current value applied to the coil, and the current value is set differently according to the steel type, thickness, width, etc. of the strip S to be transferred. The configuration of the electromagnet portion 52 is general, and a detailed description thereof will be omitted.

The electromagnet portion 52 is arranged in plural at the same rotation angle interval with respect to the center of rotation of the electromagnet roller 51. In the present embodiment, four electromagnet parts 52 are disposed on the electromagnet roller 51 at intervals of 90 degrees of rotation angle. Accordingly, due to the rotation of the electromagnet roller 51, the electromagnet portion 52 on one side is moved away from the strip S, so that the electromagnet portion 52 on the other side approaches the strip S, so that the electromagnet portion 52 continues to the strip S. Electromagnetic force can be provided to correct the upward direction of the front end of the strip (S).

1 to 4 and 11, a plurality of electromagnet rollers 51 are arranged in succession on the outlet side of the finishing mill F to correct the upward direction of the strip S. As shown in FIG.

The electromagnet roller 51 is operated sequentially in accordance with the feed rate of the strip (S). In detail, when the strip S detects that the strip S is sent out from the finishing mill F, the controller 60 turns on part I of the electromagnet roller 51 based on the detection signal. When part I of the electromagnet roller 51 is turned on, the electromagnet part 52 provided in part I of the electromagnet roller 51 is operated to generate an electromagnetic force. At this time, the remaining parts (parts II and III) except part I of the electromagnet roller 51 are in an OFF state.

Since part I of the electromagnet roller 51 is in the ON state, the strip S to be transferred is lowered toward the electromagnet roller 51 by the electromagnetic force generated in part I of the electromagnet roller 51, and the upward direction of the strip S is It is gradually corrected. At this time, the injection unit 20 corrects the upward direction of the strip (S) by injecting a high pressure fluid to the top of the strip (S).

The strip S passes through part I of the electromagnet roller 51 and then enters part II of the electromagnet roller 51 by operation of the feed roller part 50. At this time, the controller 60 turns off part I of the electromagnet roller 51 and turns on part II of the electromagnet roller 51. The strip S passing through part II of the electromagnet roller 51 is further corrected by the electromagnetic force generated in part II of the electromagnet roller 51. At this time, the operation of the injection unit 20 is performed.

Similarly, when the strip S enters part III of the electromagnet roller 51, the control unit 60 turns off part II of the electromagnet roller 51 and turns on part III of the electromagnet roller 51. The strip S passing through part III of the electromagnet roller 51 is flattened by the upward correction of the strip S by the electromagnetic force generated in part III of the electromagnet roller 51. In conjunction with the operation of part III of the electromagnet roller 51, the injection unit 20 is also operated.

When the strip S passes part I of the electromagnet roller 51, the part I of the electromagnet roller 51 is turned off, and when the strip S passes part II of the electromagnet roller 51, the electromagnet roller 51 Turning off part II of) is to prevent the feed speed of the strip S from being lowered by the electromagnetic force generated in part I / II of the electromagnet roller 51. Therefore, when the strip S passes the part, the electromagnet roller 51 of the part is switched from the ON state to the OFF state.

In this embodiment, the control unit 60 operates each part of the electromagnet roller 51 sequentially in accordance with the feed rate of the strip (S). The controller 60 sequentially takes the electromagnet roller 51 closest to the finishing mill F from the moment when the strip S is discharged from the finishing mill F in consideration of the predetermined feed speed of the strip S. Each part of the electromagnet roller 51 is operated.

Hereinafter will be described the operation principle of the device for preventing the upward of the strip according to an embodiment of the present invention.

The strip S sent from the finishing mill F is transferred to the post process by the feed roller 50. At this time, the upward prevention device of the strip for preventing the upward of the strip (S) is disposed on the outlet side of the finishing mill (F).

The strip S sent out from the finishing mill F is generated by a speed difference between the upper and lower work rolls of the finishing mill F, and the like. Therefore, the injection unit 20 sprays a high-pressure fluid toward the upper portion of the strip S so that the electromagnet roller 51 generates an electromagnetic force in accordance with the time point at which the strip S passes, thereby suppressing the upward movement of the strip S. And induces a downward direction of the strip S. As a result, the strip S is flattened before it is corrected and enters the winding facility.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary and will be understood by those of ordinary skill in the art that various modifications and equivalent other embodiments are possible. will be.

In addition, the apparatus for preventing the upward movement of the strip disposed on the outlet side of the finishing mill is described as an example, but this is merely illustrative, and the technical spirit of the present invention may be applied to other equipment other than the finishing mill. Accordingly, the true scope of the present invention should be determined by the following claims.

1: upward prevention device of strip 10: frame part
11: installation frame 12: vertical frame
13: horizontal frame 20: injection unit
30: moving part 31: driving part
32: rotating gear part 33: rack gear part
40: protective roller 50: feed roller portion
51: electromagnet roller 52: electromagnet part
60: control unit 61: detection sensor

Claims (9)

Feed roller unit for transporting the strip sent from the finishing mill;
A frame part positioned above the feed roller part;
An injection part provided in the frame part and injecting a fluid toward the strip;
A moving part provided in the frame part and moving the frame part up and down;
A control unit controlling an operation of the injection unit and the moving unit; And
A protection roller rotatably installed in the frame part,
The feed roller unit is provided with an electromagnet roller having an electromagnet portion for generating an electromagnetic force to correct the upward of the strip,
The lowermost surface of the protective roller is disposed below the lowest end of the injection portion,
The protective roller is arranged in plurality in the conveying direction of the strip,
The injection unit is prevented upward of the strip, characterized in that disposed between the protective roller, respectively.
The method of claim 1,
A sensing sensor disposed at an outlet side of the finishing mill and sensing that the strip is sent out of the finishing mill;
The detection sensor transmits a detection signal to the control unit when the transmission of the strip is detected, and the control unit controls the operation of the injection unit and the electromagnet roller based on the detection signal.
delete The method of claim 1,
The moving unit, the driving unit coupled to the frame unit;
A rotary gear part connected to the driving part and rotated by driving of the driving part; And
And a rack gear part engaged with the rotary gear part and guiding the vertical movement of the rotary gear part.
5. The method of claim 4,
The electromagnet roller is arranged in plurality on the outlet side of the finishing mill,
And the control unit sequentially operates the electromagnet rollers, starting with the electromagnet rollers disposed closest to the finishing mill.
The method of claim 5,
The electromagnet portion, the plurality of electromagnet rollers upward prevention device, characterized in that a plurality of arranged at the same rotation angle interval based on the center of rotation of the electromagnet roller.
delete The method of claim 1,
The injection unit comprises a supply pipe for receiving fluid from an external source;
A discharge pipe communicating with the supply pipe and arranged in plurality in a width direction of the strip; And
And a nozzle in communication with the discharge pipe and injecting the fluid supplied from the discharge pipe toward the strip.
9. The method of claim 8,
And a distance between the nozzle disposed at one outermost side and the nozzle disposed at the outermost outer side is the same as the width of the feed roller.

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