JP2019147165A - Coiler front face purging equipment - Google Patents

Abstract

To provide coiler front face purging equipment that does not cause quality defects due to scaling even with a product type for which requirements for surface quality are demanding, without introducing damage to a side guide and without involving a large-scale equipment modification.SOLUTION: Coiler front face purging equipment installed on a front face of a coiler comprises an injection nozzle for injecting high-pressure water downward to a place where a steel plate passes, a drain box fixed to an upper part of a side guide and receiving the high-pressure water going toward the side guide, and a drain pipe for discharging the high-pressure water from the drain box.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a coiler front purge facility installed in front of a coiler of a hot rolling line.

  In the steel mill hot rolling line, the finished rolled steel sheet is wound into a coil by a coiler and shipped.

  FIG. 5 is a side view showing the coiler and the equipment on the front side of the coiler. As shown in FIG. 5, the finish-rolled steel plate 1 passes through a side guide 2 for centering the steel plate 1, a deflector roll 3 and a pinch roll 4 for changing the traveling direction of the steel plate 1. The coiler 5 winds the coil (see, for example, Patent Document 1).

  At that time, if the steel plate 1 is wound up by the coiler 5 with the scale / foreign matter adhering to the surface of the steel plate 1, quality defects such as wrinkles and rust are generated on the surface of the steel plate 1.

  Therefore, in many cases, a side purge equipment 90 is installed on the front surface of the coiler 5 to inject high-pressure water from both sides of the steel plate 1 to remove (descaling) scale / foreign matter on the surface of the steel plate 1.

JP 2003-025015 A

  However, in recent years, demand specifications of customers have become stricter, and excellent surface properties (less surface irregularities, no scale adhesion, no rust generation, etc.) have been demanded. Since high-pressure water is jetted from both sides, removal of scales and the like on the steel sheet surface cannot be made uniform, and there are cases where scales and the like on the steel sheet surface are not completely removed.

  Although it is possible to achieve complete removal of the scale on the steel plate surface by increasing the high pressure water injection pressure of the side purge equipment, it is necessary to make major equipment modifications to the high pressure water supply system. This results in excessive removal performance, which only increases production costs.

  On the other hand, in order to uniformly inject high-pressure water onto the steel plate surface, it is sufficient to inject high-pressure water from the upper surface of the steel plate on the front surface of the coiler, but there are the following problems.

  That is, as described above, a side guide for centering the steel plate is installed on the front surface of the coiler, and the plate width of the steel plate passed through the coiler varies depending on the product. An opening / closing mechanism (for example, a hydraulic cylinder) that adjusts the opening according to the above is provided. Therefore, depending on the width of the steel plate, high-pressure water is also injected into the side guide (particularly, the opening / closing mechanism), which may cause malfunction of the side guide and further cause a failure.

  The present invention has been made in view of the circumstances as described above, and does not cause significant damage to the side guide without causing significant equipment modification, and is caused by scales and the like even in varieties that require strict surface texture specifications. It is an object of the present invention to provide a coiler front purge facility that does not cause poor quality.

  In order to solve the above problems, the present invention has the following features.

[1] A coiler front purge facility installed in front of the coiler,
An injection nozzle that injects high-pressure water downward at the location where the steel plate passes;
A drainage box fixed to the upper part of the side guide and receiving high-pressure water toward the side guide,
A drain pipe for discharging high-pressure water from the drainage box;
A coiler front purge facility characterized by comprising:

  [2] The coiler front purge equipment according to [1], wherein the spray nozzle is arranged so that high-pressure water can be sprayed over the entire width of the portion through which the steel plate passes.

  [3] The coiler front purge equipment according to [1] or [2], wherein the drainage box moves following the movement of the side guide opening adjustment.

  [4] The coiler front purge facility according to any one of [1] to [3], wherein a bottom surface of the drainage box is inclined so that a position where the drain pipe is installed is lowered.

  According to the present invention, it is possible to obtain a coiler front purge facility which does not cause quality defects caused by scales or the like even in a product having a strict requirement on the surface properties, without causing significant equipment modification, without causing damage to the side guide. be able to.

It is a side view which shows one Embodiment of this invention. It is a front which shows the coiler front purge equipment in one embodiment of the present invention. It is a front which shows the coiler front purge equipment in one embodiment of the present invention. It is a figure which shows the example of the drainage box in one Embodiment of this invention. It is a side view which shows the installation of the conventional coiler front.

  An embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a side view showing an embodiment of the present invention. As shown in FIG. 1, in this embodiment, as an existing facility, as shown in FIG. 5, a pair of side guides 2 for centering the steel plate 1, and a traveling direction of the steel plate 1 are changed. A deflector roll 3, a pinch roll 4, and a coiler 5 that winds the steel plate 1 in a coil shape are disposed. Then, instead of the side purge equipment 90 as shown in FIG. 5, the coiler front purge equipment 10 is arranged as a new equipment on the front face of the coiler 5 (in front of the pinch roll 4).

  2 and 3 are front views showing the coiler front purge equipment 10. FIG. FIG. 2 shows a state in which a steel plate 1a having the maximum plate width passes through the steel plate passed through the coiler 5, and FIG. 3 shows a state in which a steel plate 1b having a narrower plate width than the steel plate 1a having the maximum plate width is passed. It shows the state of being boarded.

  As shown in FIG. 1 to FIG. 3, the coiler front purge equipment 10 includes a nozzle header 11 and an injection nozzle (spray nozzle) 12 that injects high-pressure water 12 downward (in an obliquely downward direction) to a portion through which the steel plate 1 passes. A drain box 14 fixed to the upper part of each of the pair of side guides 2 and receiving the high-pressure water 13 directed toward the side guides 2, and a drain pipe 15 for discharging the high-pressure water received by the drain box 14 from the drain box 14. It has.

  Then, as shown in FIG. 2, a plurality of injections are performed so that the high-pressure water 13 can be injected over the entire width of the portion where the steel plate 1 may pass (that is, the portion where the steel plate 1 a having the maximum plate width passes). A nozzle 12 is disposed.

  Moreover, since the drainage box 14 is fixed to the upper part of the side guide 2, it moves following the movement of the opening degree adjustment by the opening / closing mechanism (not shown) provided in the side guide 2. Yes.

  Thereby, as shown in FIG. 2, the coiler front purge equipment 10 injects high-pressure water 13 from the upper part of the surface of the steel plate 1a to the entire width of the steel plate 1a when the steel plate 1a having the maximum plate width passes through. In addition, the high pressure water 13 does not collide with the side guide 2 whose opening is widened in accordance with the plate width of the steel plate 1a having the maximum plate width.

  Moreover, as shown in FIG. 3, when the steel plate 1b whose plate width is narrower than the steel plate 1a of the maximum plate width passes, the high pressure water 13 may be sprayed from the upper part of the surface of the steel plate 1b to the full width of the steel plate 1b. In addition, since the high-pressure water 13 directed to the side guide 2 whose opening is narrowed in accordance with the plate width of the steel plate 1b is received by the drain box 14 and discharged from the drain pipe 15, the high-pressure water 13 is discharged to the side guide 2. There is no collision.

  Here, the injection nozzle 12 and the drainage box 14 will be described.

  About the injection nozzle 12, while the collision pressure of the high pressure water 13 to the steel plate 1 becomes more than predetermined value (value required for descaling), the high pressure water 13 is injected to the full width of the steel plate 1a of the maximum plate width. It is important to select the model, number, flow rate, installation height, injection angle (attack angle, torsion angle), lapping allowance, etc.

  An example of the drainage box 14 is shown in FIG. As shown in FIG. 4, the drainage box 14 has a box shape, and is fixed to a fixing post 16 fixed to the upper end of the side guide 2 by welding with a bolt (not shown). The material is preferably made of SUS to prevent corrosion.

  And the bottom face of drainage box 14 inclines so that the position which installed drain pipe 15 installed in the bottom face of drainage box 14 may become low.

  Here, in consideration of drainability from the drainage box 14, the volume of the drainage box 14, the inclination angle of the bottom surface, and the diameter of the drain pipe 15 are determined according to the injection amount of the high-pressure water 13 received by the drainage box 14. Good.

  In addition, a rotation stop is provided so that the drainage box 14 does not come off from the fixed post 16 due to vibration or the like, and if the drainage box 14 comes off from the fixed post 16, The box 14 is connected to the side guide 2 by a fall prevention chain 17.

  In this way, the coiler front purge facility 10 in this embodiment uses existing facilities (such as the side guide 2), so that it is not necessary to make a major facility modification, and the high-pressure water 13 toward the side guide 2 is used. Is received by the drainage box 14 and discharged from the drain pipe 15, so that the side guide 2 is not damaged by the collision of the high-pressure water 13. And since the high-pressure water 13 can be uniformly injected from the upper part to the surface of the steel plate 1, it is suppressed that the quality defect resulting from a scale etc. generate | occur | produces even if the required specification of surface property is severe.

DESCRIPTION OF SYMBOLS 1 Steel plate 1a Steel plate of the maximum plate width 1b Steel plate of narrow plate width 2 Side guide 3 Deflector roll 4 Pinch roll 5 Coiler 10 Coiler front purge equipment 11 Nozzle header 12 Injection nozzle 13 High pressure water 14 Drainage box 15 Drain pipe 16 Fixed post 17 Falling Prevention chain 90 Side purge equipment

Claims (4)

A coiler front purge facility installed in front of the coiler,
An injection nozzle that injects high-pressure water downward at the location where the steel plate passes;
A drainage box fixed to the upper part of the side guide and receiving high-pressure water toward the side guide,
A drain pipe for discharging high-pressure water from the drainage box;
A coiler front purge facility characterized by comprising:   The coiler front purge equipment according to claim 1, wherein the spray nozzle is arranged so that high-pressure water can be sprayed over the entire width of the portion through which the steel plate passes.   The coiler front purge equipment according to claim 1 or 2, wherein the drainage box moves following the movement of opening adjustment of the side guide.   The coiler front purge equipment according to any one of claims 1 to 3, wherein a bottom surface of the drainage box is inclined so that a position where the drain pipe is installed is lowered.

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