JPS6020443B2 - Extraction material modification equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for correcting the position and condition of heated extraction material on the extraction hearth of a walking heating furnace.

A walking-type heating furnace transports the material by moving the movable hearth up, forward, down, and backward relative to the fixed hearth, heats it with a burner, etc. during this time, and sends the heated material from the extraction port to the rolling process, etc. However, if the area of the extraction hearth is made large, it is advantageous because the extraction hearth can have a storage function.

Figure 1 shows a heating furnace, in which 1 is a material charging port on the bottom side of the furnace;
Reference numeral 2 designates a pusher for pushing the material M, such as a slab, flume, or billet, inserted onto the movable hearth to a predetermined position on the movable hearth, 4 a fixed hearth, and 3 a movable hearth. Note that this figure shows a walking hearth type heating furnace, so 3 and 4 are movable and fixed hearths, but in a walking beam type heating furnace, these are called a movable beam and a fixed beam. However, there is no distinction made here, and they are simply referred to as fixed and movable hearths. A indicates the direction in which the material is conveyed by the movement of the movable hearth, and HF indicates the heating furnace body. Reference numeral 6 denotes an extraction part provided on the fixed hearth on the head side of the heating furnace, and 5 represents an extraction port provided in the furnace side wall of the extraction part.

FIG. 2 is a schematic plan view of this extraction section, where M, ~ and 2 are heated materials carried onto the extraction section by a movable hearth, and 7 is a discharger installed on the furnace wall on the opposite side of the extraction port 5. (not shown) This is a closing door for advancing and retracting. The extractor 6 is wide enough to allow a plurality of billets, in this example four billets M, to M4, to be arranged side by side. Multiple pieces of heated material M. The reason why the sides are closely juxtaposed on the extraction part 6 is as follows.

That is, assuming that the front end of the rectangular loop-shaped movement locus of the movable hearth 3 is 3a in FIG. 2, the dotted line M' is the end point of the material conveyance. However, in the forward movement process of the next movement cycle of the movable hearth 3, the material M' is pushed by the front end of the movable hearth 3 and advances to a position where the rear edge of the material M' contacts the front end 3a. The same process is repeated thereafter, and in the end, a plurality of materials M' are arranged in close contact with each other on the extraction hearth. However, this applies when the material M is placed in a state perpendicular to the conveyance direction in the furnace from the furnace bottom side to the furnace head side, and the conveyance is performed correctly, and the material M is placed in a non-orthogonal state , if a temperature difference occurs due to heating or bends due to softening, they may not necessarily be juxtaposed closely.
The vehicle may be placed at an angle as shown in M4 in Figure 2, or it may be placed sideways as shown in M4' in Figure 3.

For extraction, a discharger (such as pusher 2) is sent out from Sekiguchi 7 to push the tail end of each material one by one and sent out one by one from extraction port 5. If the material is in an abnormal state, the extraction will not proceed smoothly, and the material may stick together during the process, or multiple pieces may come out together. The present invention aims to provide a correction device for correcting the abnormal position and state of the extractor material and bringing it into a state of close juxtaposition perpendicular to the conveyance direction, and is characterized by the following: A plurality of rods are arranged outside the furnace wall perpendicular to the side material conveyance direction, and are arranged along the furnace wall and extend into the furnace through the furnace wall, and the rods are moved horizontally forward and backward. The present invention is provided with a drive device that rotates in the vertical direction to push the heated extraction material on the extraction hearth of the heating furnace back toward the bottom of the furnace.

This will be explained below using examples. In FIGS. 2 and 3, 10 (a, b, c are suffixes to distinguish each other) is a correction device according to the present invention, which is attached to a furnace wall HF orthogonal to the conveyance direction A of the furnace head extraction part of the heating furnace HF. A plurality of them, three in this example, are disposed outside the furnace along the furnace wall.

Each has the same structure, including a rod 11 that protrudes into the furnace through the entrance 8 provided on the furnace wall HF', a member 12 that supports the rod in a slidable manner, a truck 13, and an upper end fixed to the truck. A column 14 rotatably supports one end of the support member 12, a cylinder portion 15b' includes a piston rod 15a pivotally connected to the end of the support member 12, a ram 15 fixed to the truck 13, and a cylinder portion 16a. The piston rod 16b fixed to the support member 12 includes the ram 16 fixed to the rod 11, the running wheels 13a of the truck 13, and its rails 17.
etc. Since the formal attire 10 has the above configuration, the rod 11 can be rotated in the vertical plane about the pivot point 12a by the ram 15, and the rod can be moved forward and backward in the horizontal direction by the ram 16. Yes, trolley 13
It can be moved forward to the head of the heating furnace and retracted from there.

The height of the rod 11 is adjusted so that it is located halfway up the material M on the extraction hearth 6 in a horizontal state. For this purpose, the height (length) of the support column 14 is preferably adjustable. If the materials M, to M4 on the extraction hearth are partially slanted as shown in FIG.
Place the tip of 1 on the middle of the hearth side material M on the extraction hearth,
In this state, move the rod 11 forward to remove the material M on the extraction part.
~Push the earth back towards the hearth. With this operation, the gap between M and M4 is partially or completely filled. Next, the movable hearth 3
Add the above-mentioned material extrusion operation to the extraction hearth side.
In this way, the materials M, to M4 are pushed back from the right side and extruded from the left side, and inevitably form a state substantially perpendicular to the direction of conveyance, and are brought into a state of close juxtaposition. Material M on the extraction hearth, ~
When M4 is partially stacked, the rod 11 is tilted by the ram 15 so that the tip inside the furnace is raised as shown in FIG.
Then, by operating the ram 16, the rod tip pushes the material base towards the bottom of the furnace and knocks it off from above the material M3. When the material M4' is pushed down, it rests on the extraction hearth 6 and is probably in a flattened state as shown in FIG. Correction from this state to the correct juxtaposition state is performed by the operation described above. In addition, the material M, ground...
. . . To prevent the cart 13 from moving when pressing ..., an appropriate movement prohibition mechanism (not shown) is provided. In addition, the extraction section is widened so that a large number of materials can be placed side by side, and if other materials are piled up on top of the material at the bottom of the furnace, it cannot be handled by rotating the rod 11 by the ram 15 alone. In that case, the height of the pivot point 12a is adjusted using the support 14. However, when the extraction hearth is relatively narrow and the number of materials on the extraction hearth is small, it is sufficient to use only the number of rods, and this method is simpler in terms of operation and mechanism. As explained above, according to the present invention, the material pushed diagonally onto the extraction hearth or the material pushed in a stacked state is used for the back and forth movement of the rod provided on the cart outside the extraction hearth. Suitable for extracting materials by pushing the material back with a drive device that moves up and down and then pushing it again with a movable hearth, or by pushing down the stacked material and pushing it again with a movable hearth. Since the state can be corrected to a normal state, there is no need to stop the operation of the furnace or make it impossible to extract the material, making the extraction operation easier.

Although the present invention has been explained using a normal walking hearth type heating furnace as an example, the present invention can also be applied to a walking beam type heating furnace. It goes without saying that the present invention can also be applied to a heating furnace in which the charging port is provided in the divided portion.

[Brief Description of the Drawings] Figure 1 is a schematic cross-sectional view of a walking heating furnace in which the extraction section has a buffer function, and Figures 2 and 3 are schematic plan and side views showing embodiments of the present invention. It is. In the drawing, SF is the walking type heating furnace body, 6 is the extraction hearth, A is the material conveyance direction, HF' is the furnace wall, 11 is the rod,
M, ~M4 are heated materials, 1 is the bag entrance on the bottom side of the furnace, 15,
16 is a drive device. Fig. 1 Fig. 2 Foil Fig. 3

Claims (1)

[Claims] 1. A plurality of furnace walls are arranged along the outside of the furnace wall perpendicular to the material conveyance direction on the extraction side of the walking heating furnace,
Then, a rod penetrates the furnace wall and extends into the furnace, and the rod is moved horizontally forward and backward and rotated vertically to thrust the heated extraction material on the heating furnace extraction hearth toward the furnace tail side. An extracted material modification device characterized by comprising a drive device for pushing back down.