KR101193862B1 - Apparatus for measuring speed of strip - Google Patents
Apparatus for measuring speed of strip Download PDFInfo
- Publication number
- KR101193862B1 KR101193862B1 KR20100073181A KR20100073181A KR101193862B1 KR 101193862 B1 KR101193862 B1 KR 101193862B1 KR 20100073181 A KR20100073181 A KR 20100073181A KR 20100073181 A KR20100073181 A KR 20100073181A KR 101193862 B1 KR101193862 B1 KR 101193862B1
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- KR
- South Korea
- Prior art keywords
- strip
- speed
- unit
- speed measuring
- measuring unit
- Prior art date
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Abstract
The present invention relates to a strip speed measuring apparatus, which is located at an exit side of a finishing mill and is disposed below a conveying path of a strip sent from a finishing mill to measure a speed of the strip by an induced current generated when the strip is transferred. A phase injection section disposed at the exit side of the finishing mill and disposed at the front side of the speed measurement section and injecting fluid toward the top of the strip to remove foreign substances on the upper surface of the strip, and at the exit side of the speed measurement section at the exit side of the finishing mill. And a bottom injection portion disposed to spray the fluid toward the bottom of the strip to remove foreign matter from the bottom surface of the strip.
According to the present invention, the speed of the strip sent out from the finishing mill can be accurately measured in real time using an induction current.
Description
The present invention relates to a strip speed measuring apparatus, and more particularly, to a strip speed measuring apparatus for measuring the speed of the strip sent from the finishing mill using the induction current.
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 above technical configuration is a background art for helping understanding of the present invention, and does not mean a conventional technology well known in the art.
An object of the present invention is to provide a strip speed measuring apparatus that can accurately measure the speed of the strip sent from the finishing mill in real time using an induction current.
The strip speed measuring apparatus according to the present invention is located at the exit side of the finishing mill and disposed below the conveying path of the strip sent out from the finishing mill to measure the speed of the strip by the induced current generated during the feeding of the strip. Speed measuring unit; An injector disposed at an outlet side of the finishing mill and disposed at a front side of the speed measuring unit and configured to spray a fluid toward an upper portion of the strip to remove foreign substances from an upper surface of the strip; And a lower injection part disposed at an outlet side of the finishing mill and disposed at the front side of the speed measurement part, and spraying a fluid toward the lower part of the strip to remove foreign substances on the lower surface of the strip.
Preferably, the speed measuring unit, iron core; A primary coil wound on one side of the iron core; A secondary coil wound on the other side of the iron core; A reference current applying unit which applies a reference current to the primary coil; An induction current measuring unit measuring an induction current induced in the secondary coil by the transfer of the strip; And a speed calculator configured to receive the induced current from the inductive current measuring unit and calculate the speed of the strip.
More preferably, the iron core is formed in a U-shape, the primary coil is wound on one end of the iron core, the secondary coil is wound on the other end of the iron core, one end and the other of the iron core The end is arranged perpendicular to the feed path of the strip.
More preferably, the speed measurement unit further comprises a protection unit for protecting the foreign matter, the protection unit, surrounding the speed measurement unit, injecting a fluid above the speed measurement unit to block the falling of foreign matter in the speed measurement unit Protective spray; A protective cover that includes the speed measuring unit and exposes the speed measuring unit to the outside according to whether the speed measuring unit is operated; And an opening / closing member which slides the protective cover so that the speed measuring part is exposed to the outside when the speed measuring part is operated.
More preferably, the upper injection portion is movable up and down to adjust the height according to the thickness of the strip.
More preferably, the phase injection unit, the spray phase spraying the fluid toward the upper portion of the strip; A connecting rod on which the upper spray is mounted; A drive unit installed in the connecting rod; 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.
According to the present invention, it is possible to accurately measure the speed of the strip sent from the finishing mill through the speed measuring unit in real time.
In addition, according to the present invention, it is possible to accurately measure the speed of the strip in real time, it is possible to solve the problem of strip quality defects, such as malfunction of the equipment, strip breaking or strip overlap.
In addition, according to the present invention, since the speed measuring unit operates in a non-contact state with the strip, it is possible to block the degradation of durability due to the collision with the strip, thereby achieving time and material cost reduction in terms of maintenance and repair of the equipment.
In addition, according to the present invention, since the foreign matter remaining on the surface of the strip is removed by the upper injection section and the lower injection section before the strip passes through the speed measurement section, it is possible to accurately measure the speed of the strip.
In addition, according to the present invention, it is possible to block the falling of the foreign matter to the speed measuring unit during the operation of the speed measuring unit through the fluid spray in the protective spray it is possible to prevent the accuracy of the strip speed measurement due to the foreign matter.
In addition, according to the present invention, the speed measuring unit is prevented from being exposed to the outside through the protective cover when the speed measuring unit is inoperative, thereby preventing contamination of the speed measuring unit by foreign matter.
1 is a view schematically showing a strip speed measuring apparatus according to an embodiment of the present invention.
Figure 2 is a block diagram schematically showing a speed measuring unit in the strip speed measuring apparatus according to an embodiment of the present invention.
3 is a graph showing a proportional relationship between an induced current and a strip speed in the strip speed measuring apparatus according to an embodiment of the present invention.
4 is a view showing a speed measuring unit and a protection unit in the strip speed measuring apparatus according to an embodiment of the present invention.
5 is a view showing a state in which the protective cover is opened in the strip speed measuring apparatus according to an embodiment of the present invention.
6 is a view showing a state in which the protective cover is closed in the strip speed measuring apparatus according to an embodiment of the present invention.
7 is a view showing a state in which the image injection unit is positioned when the thick strip is sent in the strip speed measuring apparatus according to an embodiment of the present invention.
8 is a block diagram showing a control flow of the strip speed measuring apparatus according to an embodiment of the present invention.
Hereinafter, an embodiment of a strip speed measuring apparatus 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, the definitions of these terms should be made based on the contents throughout the specification.
1 is a view schematically showing a strip speed measuring apparatus according to an embodiment of the present invention, Figure 2 is a block diagram schematically showing a speed measuring unit in the strip speed measuring apparatus according to an embodiment of the present invention, Figure 3 Is a graph showing the proportional relationship between the induced current and the strip speed in the strip speed measuring apparatus according to an embodiment of the present invention. 4 is a view showing a speed measuring unit and a protection unit in the strip speed measuring apparatus according to an embodiment of the present invention, Figure 5 shows a state in which the protective cover is opened in the strip speed measuring apparatus according to an embodiment of the present invention. 6 is a view showing a state in which the protective cover is closed in the strip speed measuring apparatus according to an embodiment of the present invention. FIG. 7 is a view illustrating a state in which an upper injection part is positioned when a thick strip is sent out in a strip speed measuring apparatus according to an embodiment of the present invention, and FIG. 8 is a view illustrating a strip speed measuring apparatus according to an embodiment of the present invention. A block diagram showing the control flow.
1 and 8, the strip
The
2, 3 and 8, the
The
Since one end and the other end of the
The
The reference
The
The
The phenomenon in which a current is generated in a conductive wire by a change of magnetic flux is called an induction current. The induction current is obtained by
here,
Is the induced current, n is the number of turns, Is the change in magnetic flux, Is the amount of change in time, and the induced current is proportional to the number of turns of the coil and the amount of change in the magnetic flux per unit time.The
Operation of the
At this time, when the strip S passes through the
The
As such, the
In addition, the present invention can accurately measure the speed of the strip (S) in real time by the
The
Referring to FIG. 1, the
As a result, foreign substances such as water on the surface of the strip S are removed by the fluid injected at a high pressure before the strip S reaches the
The
The
The
The driving
The
The
The
In the present exemplary embodiment, the driving
The
Thus, before the strip S sent from the finishing mill F reaches the
The
The
4 to 6 and 8, the
The
Since a kind of protective film is formed above the
The
The fixed
The moving
The opening and closing
Hereinafter will be described the operation principle of the strip speed measuring apparatus according to an embodiment of the present invention.
The strip S sent out from the finishing mill F is transferred to the post process by the feed roller R. FIG. At this time, the
Before the strip S passes through the
The distance between the
For example, as shown in FIG. 7, when the strip S sent from the finishing mill F is a thick plate compared to FIG. 1, the
The strip S from which foreign substances on the surface are removed by the
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 strip speed measuring apparatus disposed on the outlet side of the finishing mill has been described as an example, but this is merely illustrative, and the technical spirit of the present invention may be applied to other devices other than the finishing mill. Accordingly, the true scope of the present invention should be determined by the following claims.
10: speed measurement unit 11: iron core
12: Primary coil 13: Secondary coil
14: reference current applying unit 15: induction current measuring unit
16: speed calculation unit 20: phase injection unit
21: upper spray 22: connecting rod
23: drive unit 24: rotary gear unit
25: rack gear part 30: lower injection part
40: protection part 41: protection spray
42: protective cover 43: opening and closing member
50:
Claims (6)
An injector disposed at an outlet side of the finishing mill and disposed at a front side of the speed measuring unit and configured to spray a fluid toward an upper portion of the strip to remove foreign substances from an upper surface of the strip;
A lower injection part disposed at an outlet side of the finishing mill and disposed at the front side of the speed measurement part, and spraying a fluid toward the lower part of the strip to remove foreign substances on the lower surface of the strip; And
It includes a protection unit for protecting the speed measurement unit from the foreign matter,
The protection unit may include: a protection spray surrounding the speed measurement unit and injecting a fluid upwardly of the speed measurement unit so that foreign matters fall into the speed measurement unit;
A protective cover that includes the speed measuring unit and exposes the speed measuring unit to the outside according to whether the speed measuring unit is operated; And
Strip opening and closing member for sliding the protective cover so that the speed measuring unit is exposed to the outside during the operation of the speed measuring unit.
The speed measuring unit, iron core;
A primary coil wound on one side of the iron core;
A secondary coil wound on the other side of the iron core;
A reference current applying unit which applies a reference current to the primary coil;
An induction current measuring unit measuring an induction current induced in the secondary coil by the transfer of the strip; And
And a speed calculator configured to receive the induced current from the inductive current measuring unit and calculate a speed of the strip.
The iron core is formed in a U-shape,
The primary coil is wound on one end of the iron core, the secondary coil is wound on the other end of the iron core,
One end of the iron core and the other end of the strip speed measuring apparatus, characterized in that arranged at right angles to the conveying path of the strip.
The phase injection unit is a strip speed measuring apparatus, characterized in that the vertical movement to adjust the height according to the thickness of the strip.
The phase injection unit may include: an phase spray for injecting a fluid toward an upper portion of the strip;
A connecting rod on which the upper spray is mounted;
A drive unit installed in the connecting rod;
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.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20100073181A KR101193862B1 (en) | 2010-07-29 | 2010-07-29 | Apparatus for measuring speed of strip |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20100073181A KR101193862B1 (en) | 2010-07-29 | 2010-07-29 | Apparatus for measuring speed of strip |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20120011412A KR20120011412A (en) | 2012-02-08 |
KR101193862B1 true KR101193862B1 (en) | 2012-10-26 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR20100073181A KR101193862B1 (en) | 2010-07-29 | 2010-07-29 | Apparatus for measuring speed of strip |
Country Status (1)
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KR (1) | KR101193862B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101990948B1 (en) * | 2017-09-07 | 2019-06-19 | 주식회사 포스코 | Apparatus and method for spraying powder in hot rolling process |
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2010
- 2010-07-29 KR KR20100073181A patent/KR101193862B1/en not_active IP Right Cessation
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KR20120011412A (en) | 2012-02-08 |
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