KR100775487B1 - An apparatus for heating a cold slab in the hot roll utility - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat preservation and preheating apparatus for a rolled atmospheric material, wherein a plurality of rollers (43) are disposed between rollers (34) of a roller table (30) provided to support and move a bar or slab in a normal rolling state. ); A support frame (42) rotatably supporting the roller (43) and installed up and down by a cylinder (41); A drive motor 44 for driving the roller 43 to rotate; And it characterized in that it comprises a sensor provided to detect the atmospheric material at at least two positions in the rolling progress direction, the temperature of the slab when the rolling of the slab already extracted from the furnace by the various factors is stopped It has the effect of preventing the fall and preheating to a rollable temperature by the trailing trailing slab as the rolling progresses normally.

Hot Rolled, Heat, Air, Slab, Preheat

Description

An apparatus for heating a cold slab in the hot roll utility}

1 is a configuration diagram schematically showing a general hot rolling facility;

Figure 2 is a schematic diagram showing the overall rolled air holding material preheating and preheating apparatus according to the present invention;

Figure 3 is an external perspective view showing in detail the heat retaining cover of the present invention;

4 is a partially exploded perspective view showing a roller table dedicated to air quality which is a main part of the present invention;

FIG. 5 is a perspective view illustrating a heat insulation board configuration additionally provided in the roller table dedicated to air cleaners of FIG. 4; FIG.

6 and 7 illustrate the operation of the present invention.

※ Explanation of symbols about main part of drawing ※

10: heat insulation cover 11: heat insulation

12: groove 14: heating burner

15: temperature detection sensor 20: swing arm

25: cylinder 30, 40: roller table

32: drive motor 34: roller                 

41 cylinder 42 support frame

43: roller 44: drive motor

45: heat insulating material 54: heat insulating plate

55 cylinder 56a, 56b sensor

The present invention relates to a heat preservation and preheating device for rolling materials, and more particularly, to prevent the slab temperature from being lowered when rolling of the slab already extracted from the heating furnace is stopped by various factors, and rolling may be performed normally. The present invention relates to a rolling air insulation heat preservation and preheating device that is capable of being preheated to a rollable temperature by a trailing slab.

In general, the hot rolling facility has a configuration as shown in FIG. 1, which is passed through the roughing mill 120 and the finishing mill 130 after the slab is preheated and heated in the heating furnace 110 to form a coil ( 140) to be commercialized.

The temperature of the slab is extracted from the heating furnace 110 is about 1200 ~ 1160 ℃, the slab extracted from the heating furnace 100 is formed as a bar (Bar) easy to roll in the roughing mill (120), this bar The temperature is usually 1030 ℃ and at least 900 ℃ should be a normal rolling in the finishing mill (130).

In the finishing mill 130, a situation in which the rolling of the bar is temporarily stopped occurs, which is caused by plate failure and plate bite due to excessive rolling down or down due to poor rolling, failure of the rolling equipment, or blackout, roll replacement and inspection of equipment. Occurs when unwinding occurs due to necessity or necessity or abnormality of the winder.

When the rolling is temporarily stopped as described above, the slab extraction from the heating furnace 110 is stopped, and the previously extracted slabs and bars are positioned on the roller table 150 between the heating furnace 110 and the rough rolling mill 130. If the waiting time is longer, the slab and bar temperature is significantly lowered, and it is impossible to carry out finishing rolling, and in addition, when the thickness of the slab is 150 mm or less or 12 m or more in length, the heating furnace 110. It is also impossible to recharge the furnace so that follow-up measures such as reheat treatment are taken.

Here, the reheat material treatment refers to drawing out the slab on the roller table 150 to the outside when normal rolling is not performed for the same reason as described above.

Of course, the slabs that are waiting on the roller table can be cut back by the oxygen cutter to a predetermined length and then reloaded. There were three problems.

The present invention is to solve this conventional problem, to prevent the slab temperature is lowered when the rolling of the slab already extracted from the heating furnace is stopped by various factors, and by the trailing slab when the rolling proceeds normally It is an object of the present invention to provide a rolled air preservation and preheating device that can be preheated to a rollable temperature.

As a technical configuration for achieving the above object, the present invention is a device that heats and preheats a bar or slab, which is an atmospheric material waiting in a roller table between rolling mills, to be suitable for rolling, due to various factors. A plurality of rollers disposed between the rollers of the roller table, the roller table being adapted to support and move the bar or slab when; A support frame rotatably supporting the roller and installed up and down by a cylinder; A drive motor for rotating the roller; And a sensor provided to detect the atmospheric material at at least two positions with respect to the rolling progress direction.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view of the apparatus of the present invention as a whole, a heat cover 10 is provided to cover the bar or slab (S) waiting on the roller table, the heat cover 10 is the top of the roller table It has a shape that can cover the whole.

The inner surface of the heat insulating cover 10 is covered with a heat insulating material 11 to block the heat of the bar or slab S from dissipating to the periphery, and the heat insulating material 11 must be able to withstand high temperatures. do.

In addition, a plurality of semicircular grooves 12 are formed at both lower ends of the heat insulating cover 10 so as to enclose both ends of the rollers forming the roller table, and a plurality of locations of the heat insulating cover 10 are formed. The heating burner 14 and the temperature detection sensor 15 capable of detecting the temperature of the bar or the slab S are installed in the bar or the slab S.

In addition, as shown in FIG. 3, the front and rear sides of the heat-retaining cover 10 have a position detecting sensor 16a and 16b that can detect the position of the bar or the slab S. Each of the heat insulating cover 10 is installed at one end of the pivoting arm 20, and the pivoting arm 20 is pivotally driven by the cylinder 22 so that the thermal cover 10 is bar or slab ( It is configured to descend by turning so as to cover S) or vice versa.

In more detail, a pair of supports 24 perpendicular to the bottom of the facility are fixedly installed, and each of the supports 24 is provided with a rotation support block 25, and the rotation support block 25 is provided. Both ends of the rotating shaft 26 is rotatably mounted to the rotating shaft 26, and the rotating shaft 26 is connected to the cylinder 22 by a link means so that the rotating shaft 26 can be driven to rotate by the cylinder 22. Have

As shown in Fig. 2, the roller table of the present invention supports the bar or slab when the normal rolling is made, and the roller table 30, which is capable of transporting in the direction of rolling progress, and the bar or slab when the rolling is stopped. It consists of a roller table 40 dedicated to the atmospheric material which can be supported and transported.

The roller table 30 is rotated by the drive motor 32 and has a general structure having a plurality of rollers 34 installed at predetermined intervals in the rolling progress direction, and a detailed description thereof will be omitted.

As shown in more detail in FIG. 4, the atmospheric roller table 40 includes a support frame 42 which is provided to move up and down by a plurality of vertical cylinders 41, and the support frame 42 of the support frame 42. The rollers 43 are installed in the upper portion and are driven by the driving motor 44 and are provided in plurality in predetermined rolling intervals in the rolling progress direction, and lower portions of both sides in the width direction with respect to the rolling progress direction of the support frame 42, respectively. It is made of a heat insulating material 45 provided to block the movement of heat.

In addition, the lower portion of the supporting material holding means shown in FIG. 5 is installed at the lower portion of the support frame 42, which is a support frame 52 having a rectangular frame shape fixed to the support frame 42, and the support. It is provided on the frame 52 so as to be located on both sides of the bar or the slab (S) and the heat insulating plate 54 which is moved in the width direction of the bar or the slab (S) by the cylinder 55, and the bar or the slab (S) of It includes sensors 56a and 56b respectively installed at the front and rear sides of the rolling progress direction to sense the bar or the slab S.

The operation of the present invention having the above configuration will be described.

When the running of the bar or slab S being stopped by various factors is stopped, the bar or slab S is moved to the upper portion of the roller table provided between the rolling mills.

When the bar or slab S is moved above the roller table, the bar or slab S is lifted by these rollers 43 by raising the cylinder 41 and raising the rollers 43 connected thereto. Support, and this state is shown in FIG. In addition, by driving the cylinder 55, the heat insulating plates 54 connected thereto are moved in a direction close to each other, so that the heat of the bar or the slab S is dissipated downward.

In addition, the cylinder 22 is driven to pivot the pivot arm 20 connected thereto to cover the upper portion of the bar or slab S with the thermal cover 10, and the state of the thermal cover 10 is shown in FIG. Same as the state shown in.

Then, by driving the drive motor 44 to drive the rollers 43 to rotate the bar or the slab (S) located on the top of the rollers 43 to reciprocate in the direction of rolling progress and the opposite direction bar or It prevents the lower surface of the slab S from being locally cooled only at the portion in contact with the roller 43 and also prevents only some of the rollers 43 from deteriorating in contact with the bar or the slab S.

At this time, the internal temperature of the thermal cover 10 and the temperature of the bar or slab S detected by the temperature detection sensor 14 installed in the thermal cover 10 are continuously checked in a facility control computer (not shown). When is lowered below the set temperature, it is preferable to operate the heating burner 14 to maintain the temperature in the predetermined temperature range.

When the above-described operation is repeated and the rolling equipment is normally operated, the trailing slabs S 'are transferred along the upper portions of the rollers 34 in the rolling progress direction, and the cylinders 55 are driven in the opposite direction to each other by The heat of the trailing slab S 'is transferred to the slab S which is reciprocated along the upper portions of the rollers 43 by moving the heat insulating plate 54 in the direction away from each other. Of course, the trailing slab S 'is continuously detected by the sensors 56a and 56b, and when the trailing slab S' is present, the heat insulating plate 54 is opened and the trailing slab S 'is absent. It is preferable to close the heat insulating plate 54 to minimize the heat dissipation of the slab S downward.

That is, the slab S is heated by the heat of the trailing slab S ', and when the temperature of the slab S heated by the trailing slab S' is raised to a temperature suitable for rolling, the trailing slab ( When it is determined that it does not interfere with the running of S '), the cylinder 41 is lowered so that the slab S can be rolled along the normal path.

Of course, at this time, the heat retaining cover 10 covering the slab S is returned to an initial state by driving the cylinder 22 to wait for the next work.

As described above, according to the rolling atmospheric material preservation and preheating apparatus according to the present invention, when the rolling of the slab already extracted from the heating furnace is stopped by various factors, the temperature of the slab is reduced by covering the upper part of the slab with a heat retaining cover. If the slab temperature is detected to be lowered, the heating burner installed in the thermal cover is operated to heat the slab so that the temperature can be maintained in a certain range. It has the effect of being preheated to a rollable temperature by a trailing slab to be rolled.

Claims (4)

In a device for keeping and preheating a bar or slab, which is an atmospheric material waiting on a roller table between rolling mills, for various purposes, A plurality of rollers 43 disposed between the rollers 34 of the roller table 30 provided to support and move the bar or slab in the normal rolling state; A support frame (42) rotatably supporting the roller (43) and installed up and down by a cylinder (41); A drive motor 44 for driving the roller 43 to rotate; And And a sensor provided to detect the atmospheric material at at least two positions with respect to the rolling progress direction. According to claim 1, wherein the heat insulating plate 54 mounted on the support frame 42 so as to be slid in the width direction on both sides in the width direction of the atmospheric material, and the cylinder for driving the heat insulating plate 54 to slide ( And further comprising 55). According to claim 1, wherein the heat cover having a shape covering the upper portion of the atmospheric material is provided with a heat shielding heat insulating material 11 on the inner surface, and the heat retaining cover 10 as necessary Rolling air holding and preheating device, characterized in that it further comprises a cylinder 22 connected to the heat retaining cover (10) to move to the top of the air or to another position from the top of the air. The heating cover 10 is provided with a heating burner 14 for heating the atmospheric material and a temperature detecting sensor 15 for detecting the temperature of the atmospheric material in a plurality of places. Rolled air material insulation and preheating device characterized in that.

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