JPS6055565B2 - Side charging type walking furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a material charging structure for a walking furnace.

In a walking heating furnace or walking heat treatment furnace, when charging material into the furnace from the bottom of the furnace, an opening is provided in the side wall of the furnace, that is, near the front wall, and the material is charged vertically from there. Many methods have been adopted.

This method is shown in FIGS. 1 and 2.

A side wall 1 extending in the longitudinal direction of the walking hearth type heating furnace is a side wall 2 extending in the width direction of the furnace, that is, a front wall.

Reference numeral 3 denotes a furnace bottom side charging port for material M, which has an opening in the side wall 1. The material M is charged into a horizontal charging hearth 6 by a charging car 5 that is movably placed on a roller table 4 placed close to the outside of the furnace at the charging port 3 .

Next, the material M on the charging hearth 6 is transferred to the end of the fixed hearth 8, that is, the material M shown by the chain line, by a charging device 7 that penetrates the front wall 3 and projects from outside the furnace into the furnace. It will be pushed into position. Material M pushed into the end of the fixed hearth 8
is sequentially transported in the direction of arrow A, that is, toward the extraction side, in a transport cycle of lowering, retreating, raising, and advancing the movable hearth 9.
However, since the charging material M is a slab-rolled steel billet or a steel billet extracted from a continuous casting machine, it is inevitable that the material will be bent during the cooling process or when the material is cut.

In addition, the pushing metal at the tip of the charging car 5 is only in contact with the material, and the direction of the charged material is not determined because it is pushed out onto the charging hearth 6 through the straight roller table 4. There were many things. If such curved material is charged in an unstable direction, it may be pushed beyond the charging hearth and into the furnace.

In this case, hook the tip of the material to the movable hearth opening,
This may make charging impossible or collide with materials already charged into the furnace, disrupting the spacing between the materials in the furnace and causing uneven heating of the materials. Furthermore, if the material entered too far inside the furnace, the material could not be pushed completely with the material pushing stroke of the charging device provided on the front wall, making it impossible to obtain an appropriate material spacing. On the other hand, when the mounting material was pushed toward the front wall, it collided with the front wall, damaging the wall surface.

In the present invention, the material charging path, that is, the material charging hearth 6 is directed from the end of the fixed hearth 8 toward the hearth butt wall, that is, the front wall side.
A taper roller having an inclination angle approximately equal to that of the material charging path is provided near the outside of the material charging port 3, and The object of the present invention is to provide a material charging hearth for a walking furnace that completely eliminates the above-mentioned troubles by disposing, for example, a guide plate having an uneven shape when viewed from a longitudinal section at a portion corresponding to the material height.

An embodiment based on the present invention will be explained with reference to FIGS. 3 and 4.

Numbers 1 to 9 in the figures correspond to the locations indicated in FIGS. 1 and 2.

In the present invention, the charging hearth 6 is connected from the end of the fixed hearth 8 to the front wall 2.
The fixed hearth 8 level L is inclined linearly downward toward the fixed hearth 8 level L. Therefore, the material charged from the charging port 3 is guided in the direction of inclination of the charging hearth 6, that is, toward the front wall 2 side, by the component force due to the frictional force of its own weight.

In addition, near the outside of the furnace of the material charging port 3, taper rollers 4 having approximately the same inclination angle as the charging hearth 6 are arranged in parallel in the same inclination direction as the charging hearth. FIG. 4 shows an embodiment in which a guide plate 10 is provided at a portion corresponding to the material height inside the front wall of the furnace. The guide plate 10 is made of heat-resistant steel or the like, and has an uneven shape when viewed from a longitudinal section so that it can withstand material impact from the lateral direction X, and has a large section modulus to increase mechanical strength. At the same time, it has a cross-sectional structure that is less prone to thermal distortion, increasing its effectiveness. Further, the guide plate 10 is fixed from outside the front wall furnace through a channel or the like by tightening bolts. With the present invention configured as described above, the wrapping material is conveyed on the roller table along the slope of the tapered roller,
It is restricted to the front wall side, which is the inclined direction of the material charging path in the furnace.

Further, since the front wall is provided with a guide plate having an uneven shape, even if the material is restricted to the front wall side, the side wall is protected. Therefore, even if curved material is charged from the charging port with unstable directionality, various problems such as exceeding the range of the charging hearth or colliding with the front wall will occur. Trouble will be avoided.

Although the present invention has been explained using a walking hearth type furnace as an example, it can be applied not only to a walking beam type furnace but also to a busher type furnace as long as the material is side-charged, and the same effect can be obtained. Needless to say.

[Brief explanation of the drawing]

FIG. 1 is a plan sectional view of a walking hearth furnace showing a conventional example, FIG. 2 is a side sectional view taken along line a-a in FIG. 1, and FIG. 3 is a plan sectional view of a walking hearth furnace showing an embodiment of the present invention. FIG. 4 is a side sectional view taken along line bb in FIG. 3, and FIG. 5 is a perspective view of the present invention. 1: side wall, 2: front wall, 3: charging port, 4: roller table, 5: charging car, 6: charging hearth, 8: fixed hearth, 10: guide plate.

Claims (1)

[Claims] 1. In a walking furnace in which rollers are arranged outside the furnace and materials are charged from the side of the furnace, the material charging path in the width direction of the furnace is sloped downward toward the side wall of the furnace bottom, and the inclination angle and A side charging type walking furnace, characterized in that the rollers are also formed with substantially equal inclination angles, and a guide plate is provided on the inner wall of the furnace tail.