JPS6212287B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a heating furnace extraction device.

In order to achieve energy savings in heating furnaces, various methods are already being developed, such as strengthening the skid insulation, extending the length of the furnace to reduce the exhaust gas temperature, and strengthening waste heat recovery.

However, the material to be heated to be heated to the rolling temperature is usually extracted from the furnace body by providing a large opening corresponding to the size of the material to be heated, and mechanically extracting the material through this opening. (End extraction method) To briefly explain the conventional end extraction method, as shown in Fig. 1, when the material to be heated is sufficiently heated and reaches the extraction point of the furnace, the door 3 is opened and the extractor 2
Extracted from the furnace using a mechanical method. Therefore,
The extraction end of the furnace has a fairly large opening, taking into account the height of the heated material and the deformation of the heated material.

In response to this, a side extraction method has been devised, and methods have also been implemented to make this opening smaller.
In this case, there is a method in which a roller is provided in the furnace, the material to be heated is placed on the roller, and the material is extracted by driving the roller. However, since the heating temperature of a heating furnace for a steel rolling mill is high, the rollers in this furnace must be water-cooled from the viewpoint of high-temperature strength. Therefore, the heat loss caused by water cooling is large, and the equipment is complicated and expensive, and maintenance requires considerable consideration. In addition, in side extraction, as shown in FIG. 2, a water-cooled roller 4 is provided in the furnace, and the heated material 1 is placed on the roller 4, conveyed in a direction perpendicular to the length of the furnace, and extracted from the extraction port 5, so that the opening area is However, the water cooling device 6 for the rollers 4 always causes a large amount of heat loss, and the rollers 4 are each provided with a rotating device and further provided with a water cooling device, resulting in a very complicated structure.

As shown in the above background, there is a strong demand from related departments for an extraction device with a small opening in the furnace body and a simple mechanism.

In the present invention, a rail is laid in the width direction of the heating furnace outside the furnace, an extraction truck is arranged on the rail, and a ram is arranged on the extraction truck, which is connected to a drive device and can freely move forward and backward in the length direction of the heating furnace. This device extracts the material to be heated from the opening in the side wall of the heating furnace by moving the ram along with the extraction cart in the width direction of the heating furnace.

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

FIG. 3 shows a sectional view of the invention, and FIG. 4 shows a plan view of the invention.

A ram opening 18 is provided in the extraction end wall 11' in the furnace length direction of the heating furnace body 11, and the extraction ram 13 is inserted through the extraction port 16 provided in the side wall of the heating furnace.
The material to be heated 12 is transferred onto the extraction ram 13 by a walking beam 14. Since the extraction ram 13 can be moved horizontally through the ram opening 18, the extraction ram 13 can be moved on the rail 1 laid outside the furnace.
The material to be heated 12 is moved in the width direction of the heating furnace while being supported by the extraction cart 15 that moves on the extraction cart 15.
is extracted from the extraction port 16. Extraction ram 1 outside the furnace
The heated material 12 on the top 3 is transferred to a rolling roller table (not shown).

During heating when the heated material 12 is not extracted, the extraction ram 13
is pulled out of the furnace by the drive device 21 on the cart 15 and stands by, and during this time the ram opening 18 in the furnace wall is closed to the door 1.
9 to prevent heat dissipation.

A cover 20 is attached to the ram 13, and the cover 20 can prevent the heat inside the furnace from dissipating to the outside of the furnace during the extraction operation.

Further, the furnace body door 19 is divided in the furnace width direction, and the ram 13
As the material 12 to be heated is transferred and moved to the extraction port 16 (side part), the plurality of divided doors 19 are closed one after another, making it possible to minimize heat dissipation. Alternatively, extend the cover 20 left and right to remove the extraction ram 1.
3 can be made long enough to close the opening of the furnace body at the point where the material to be heated 12 is extracted.

After the ram 13 has finished extracting the heat target material 12, it is moved backward, and the extraction cart 15 returns to its original position and waits for extraction.

The advantages of the present invention are Thermal efficiency is improved because the extraction opening area is small.

The extraction mechanism is simple and maintenance work can be done outside the furnace.

The roller table at the extraction end of the conventional method can be omitted, reducing equipment costs.

A split door should be attached to the opening of the heating furnace so that it can be opened and closed. Also, by covering the extraction ram, heat dissipation can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of an example of a conventional device. FIG. 2 is a side sectional view of another example of a conventional device. FIG. 3 is a longitudinal sectional view of the present invention. FIG. 4 is a plan view of the present invention. 11: Heating furnace body, 11': Extraction end wall in the furnace length direction, 12: Material to be heated, 13: Extraction ram, 14:
Walking beam, 15: extraction truck, 16: side wall extraction port, 17: truck rail, 18: opening for ram at the long end of the furnace, 19: door of opening 18, 20: ram cover, 21: drive device on the truck.

Claims (1)

[Claims] 1. A ram opening is provided in the extraction end wall in the longitudinal direction of the heating furnace, a rail is laid near the outside of the furnace along the extraction end wall in the longitudinal direction of the heating furnace, and an extraction cart is placed on the rail, and the extraction A ram is connected to the drive device on the cart and is movable in the longitudinal direction of the heating furnace.The tip of the ram is inserted into the furnace, the material to be heated is placed on it, and the ram is moved along with the extraction cart into the heating furnace. An extraction device for a heating furnace, characterized in that the material to be heated is extracted from an opening in a side wall of the heating furnace by moving it in the width direction of the furnace.